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[Bug 1526537] Re: blk_update_request: I/O error

To: kernel-packages@xxxxxxxxxxxxxxxxxxx
From: "D. Charles Pyle" <dcharlespyle@xxxxxxx>
Date: Sat, 09 Apr 2016 18:16:52 -0000
Reply-to: Bug 1526537 <1526537@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
Still seeing this in 4.4.0 kernels on Ubuntu 16.04.

$ dmesg | grep -i blk
[    5.660121] systemd[1]: systemd 229 running in system mode. (+PAM +AUDIT +SELINUX +IMA +APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ -LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD -IDN)
[   60.473635] blk_update_request: I/O error, dev loop0, sector 151271776
[   64.663131] blk_update_request: I/O error, dev loop0, sector 193202168
[   67.053226] blk_update_request: I/O error, dev loop0, sector 155758640
[   67.119192] blk_update_request: I/O error, dev loop0, sector 155758648
[   67.189707] blk_update_request: I/O error, dev loop0, sector 155758656
[   67.353011] blk_update_request: I/O error, dev loop0, sector 154296456
[   67.411390] blk_update_request: I/O error, dev loop0, sector 155758664
[   67.469595] blk_update_request: I/O error, dev loop0, sector 154296464
[   67.529317] blk_update_request: I/O error, dev loop0, sector 155758672
[   67.586518] blk_update_request: I/O error, dev loop0, sector 155758680
[   67.669838] blk_update_request: I/O error, dev loop0, sector 155758688
[   67.746886] blk_update_request: I/O error, dev loop0, sector 155758696
[   72.829706] blk_update_request: 8 callbacks suppressed
[   72.829712] blk_update_request: I/O error, dev loop0, sector 155758768
[   73.164340] blk_update_request: I/O error, dev loop0, sector 155758776
[   73.672569] blk_update_request: I/O error, dev loop0, sector 155758784
[   80.571864] blk_update_request: I/O error, dev loop0, sector 155758792
[   80.660314] blk_update_request: I/O error, dev loop0, sector 67514472
[   80.735506] blk_update_request: I/O error, dev loop0, sector 158408744
[   80.789497] blk_update_request: I/O error, dev loop0, sector 67514480
[   80.843609] blk_update_request: I/O error, dev loop0, sector 67514488
[   80.898603] blk_update_request: I/O error, dev loop0, sector 67514496
[   80.957007] blk_update_request: I/O error, dev loop0, sector 67514504
[   99.165416] blk_update_request: I/O error, dev loop0, sector 158408720
[  100.452488] blk_update_request: I/O error, dev loop0, sector 158409144
[  100.452497] blk_update_request: I/O error, dev loop0, sector 158409184
[  106.492835] blk_update_request: I/O error, dev loop0, sector 67515384
[  107.409988] blk_update_request: I/O error, dev loop0, sector 155760968
[  705.902224] blk_update_request: I/O error, dev loop0, sector 158410984
[  707.433389] blk_update_request: I/O error, dev loop0, sector 158411328
[  710.156894] blk_update_request: I/O error, dev loop0, sector 154299240
[  711.846610] blk_update_request: I/O error, dev loop0, sector 158411440
[  712.162845] blk_update_request: I/O error, dev loop0, sector 158411664
[  713.730702] blk_update_request: I/O error, dev loop0, sector 158411680
[  800.300872] blk_update_request: I/O error, dev loop0, sector 154299328
[  880.661945] blk_update_request: I/O error, dev loop0, sector 155762080
[  881.002646] blk_update_request: I/O error, dev loop0, sector 158411848
[  883.469054] blk_update_request: I/O error, dev loop0, sector 158411968
[ 1489.772068] blk_update_request: I/O error, dev loop0, sector 158412376
[ 2018.027178] blk_update_request: I/O error, dev loop0, sector 130638328
[ 2031.753835] blk_update_request: I/O error, dev loop0, sector 160431360
[ 2031.774355] blk_update_request: I/O error, dev loop0, sector 160431384
[ 2031.786216] blk_update_request: I/O error, dev loop0, sector 160431496
[ 2031.786916] blk_update_request: I/O error, dev loop0, sector 160431544
[ 2031.788537] blk_update_request: I/O error, dev loop0, sector 160431696
[ 2031.801450] blk_update_request: I/O error, dev loop0, sector 130638544
[ 2031.803146] blk_update_request: I/O error, dev loop0, sector 130638672
[ 2031.803366] blk_update_request: I/O error, dev loop0, sector 130638680
[ 2041.632516] blk_update_request: I/O error, dev loop0, sector 130638800
[ 2041.633634] blk_update_request: I/O error, dev loop0, sector 130638928
[ 2041.633845] blk_update_request: I/O error, dev loop0, sector 130638936
[ 2104.926648] blk_update_request: I/O error, dev loop0, sector 130640656
[ 2104.926911] blk_update_request: I/O error, dev loop0, sector 130640664
[ 2113.298548] blk_update_request: I/O error, dev loop0, sector 116244168
[ 2113.300456] blk_update_request: I/O error, dev loop0, sector 152088160
[ 2113.300827] blk_update_request: I/O error, dev loop0, sector 152088168
[ 2113.301032] blk_update_request: I/O error, dev loop0, sector 152088176
[ 2113.301396] blk_update_request: I/O error, dev loop0, sector 152088192
[ 2113.302102] blk_update_request: I/O error, dev loop0, sector 152088256
[ 2113.302301] blk_update_request: I/O error, dev loop0, sector 152088264
[ 2113.302506] blk_update_request: I/O error, dev loop0, sector 152088272
[ 2113.302812] blk_update_request: I/O error, dev loop0, sector 152088288
[ 2114.032757] blk_update_request: I/O error, dev loop0, sector 130640832
[ 2119.398439] blk_update_request: 4 callbacks suppressed
[ 2119.398443] blk_update_request: I/O error, dev loop0, sector 152088392
[ 2119.398816] blk_update_request: I/O error, dev loop0, sector 152088400
[ 2119.400832] blk_update_request: I/O error, dev loop0, sector 116244336
[ 2119.401162] blk_update_request: I/O error, dev loop0, sector 152088440
[ 2119.401434] blk_update_request: I/O error, dev loop0, sector 152088448
[ 2119.417108] blk_update_request: I/O error, dev loop0, sector 152088456
[ 2119.417364] blk_update_request: I/O error, dev loop0, sector 116244344
[ 2119.431849] blk_update_request: I/O error, dev loop0, sector 152088464
[ 2119.432440] blk_update_request: I/O error, dev loop0, sector 152088488
[ 2119.432803] blk_update_request: I/O error, dev loop0, sector 116244368
[ 2124.462209] blk_update_request: 17 callbacks suppressed
[ 2124.462213] blk_update_request: I/O error, dev loop0, sector 158597192
[ 2124.472993] blk_update_request: I/O error, dev loop0, sector 158597336
[ 2124.473342] blk_update_request: I/O error, dev loop0, sector 158486656
[ 2124.473578] blk_update_request: I/O error, dev loop0, sector 158486672
[ 2140.051957] blk_update_request: I/O error, dev loop0, sector 130640992
[ 2140.052293] blk_update_request: I/O error, dev loop0, sector 130641000
[ 2140.052472] blk_update_request: I/O error, dev loop0, sector 130641008
[ 2140.998325] blk_update_request: I/O error, dev loop0, sector 84436784
[ 2140.998788] blk_update_request: I/O error, dev loop0, sector 84436792
[ 2142.289229] blk_update_request: I/O error, dev loop0, sector 84436880
[ 2142.289732] blk_update_request: I/O error, dev loop0, sector 84436904
[ 2142.289934] blk_update_request: I/O error, dev loop0, sector 84436912
[ 2143.154434] blk_update_request: I/O error, dev loop0, sector 130641096
[ 2143.154784] blk_update_request: I/O error, dev loop0, sector 130641112
[ 2145.516285] blk_update_request: 10 callbacks suppressed
[ 2145.516289] blk_update_request: I/O error, dev loop0, sector 84436992
[ 2145.516604] blk_update_request: I/O error, dev loop0, sector 84437000
[ 2145.517069] blk_update_request: I/O error, dev loop0, sector 84437008
[ 2146.272149] blk_update_request: I/O error, dev loop0, sector 84437056
[ 2146.272451] blk_update_request: I/O error, dev loop0, sector 84437064
[ 2146.272884] blk_update_request: I/O error, dev loop0, sector 84437072
[ 2147.156530] blk_update_request: I/O error, dev loop0, sector 158597896
[ 2147.156794] blk_update_request: I/O error, dev loop0, sector 158597904
[ 2147.157186] blk_update_request: I/O error, dev loop0, sector 158597912
[ 2147.926803] blk_update_request: I/O error, dev loop0, sector 158597984
[ 2150.929381] blk_update_request: 7 callbacks suppressed
[ 2150.929385] blk_update_request: I/O error, dev loop0, sector 130641432
[ 2150.930334] blk_update_request: I/O error, dev loop0, sector 130641480
[ 2151.725016] blk_update_request: I/O error, dev loop0, sector 84437272
[ 2151.725254] blk_update_request: I/O error, dev loop0, sector 130641520
[ 2151.725446] blk_update_request: I/O error, dev loop0, sector 130641528
[ 2151.725647] blk_update_request: I/O error, dev loop0, sector 130641536
[ 2151.725846] blk_update_request: I/O error, dev loop0, sector 130641544
[ 2151.726042] blk_update_request: I/O error, dev loop0, sector 130641552
[ 2151.726252] blk_update_request: I/O error, dev loop0, sector 130641560
[ 2151.726446] blk_update_request: I/O error, dev loop0, sector 130641568
[ 2156.140251] blk_update_request: 17 callbacks suppressed
[ 2156.140255] blk_update_request: I/O error, dev loop0, sector 158598240
[ 2156.140484] blk_update_request: I/O error, dev loop0, sector 158598248
[ 2156.140687] blk_update_request: I/O error, dev loop0, sector 158598256
[ 2156.140968] blk_update_request: I/O error, dev loop0, sector 158598272
[ 2156.143178] blk_update_request: I/O error, dev loop0, sector 158598280
[ 2156.151593] blk_update_request: I/O error, dev loop0, sector 84437360
[ 2156.151928] blk_update_request: I/O error, dev loop0, sector 84437368
[ 2156.152160] blk_update_request: I/O error, dev loop0, sector 84437376
[ 2156.152368] blk_update_request: I/O error, dev loop0, sector 84437384
[ 2156.152598] blk_update_request: I/O error, dev loop0, sector 84437392
[ 2161.645089] blk_update_request: 388 callbacks suppressed
[ 2161.645093] blk_update_request: I/O error, dev loop0, sector 158488096
[ 2161.645545] blk_update_request: I/O error, dev loop0, sector 158488112
[ 2161.645858] blk_update_request: I/O error, dev loop0, sector 158488128
[ 2161.646142] blk_update_request: I/O error, dev loop0, sector 158488144
[ 2161.646384] blk_update_request: I/O error, dev loop0, sector 158488152
[ 2161.646679] blk_update_request: I/O error, dev loop0, sector 158488168
[ 2161.646885] blk_update_request: I/O error, dev loop0, sector 158488176
[ 2161.647111] blk_update_request: I/O error, dev loop0, sector 158488184
[ 2161.647416] blk_update_request: I/O error, dev loop0, sector 158488200
[ 2161.647710] blk_update_request: I/O error, dev loop0, sector 158488216
[ 2167.073513] blk_update_request: 25 callbacks suppressed
[ 2167.073516] blk_update_request: I/O error, dev loop0, sector 158598760
[ 2167.073831] blk_update_request: I/O error, dev loop0, sector 158488352
[ 2167.074005] blk_update_request: I/O error, dev loop0, sector 158488360
[ 2168.203889] blk_update_request: I/O error, dev loop0, sector 158598840
[ 2169.177477] blk_update_request: I/O error, dev loop0, sector 158598848
[ 2171.375908] blk_update_request: I/O error, dev loop0, sector 160523312
[ 2171.376195] blk_update_request: I/O error, dev loop0, sector 160523320
[ 2171.376396] blk_update_request: I/O error, dev loop0, sector 160523328
[ 2171.376598] blk_update_request: I/O error, dev loop0, sector 160523336
[ 2172.281347] blk_update_request: I/O error, dev loop0, sector 160523504
[ 2172.285458] blk_update_request: I/O error, dev loop0, sector 160523512
[ 2172.285951] blk_update_request: I/O error, dev loop0, sector 160523536
[ 2172.286274] blk_update_request: I/O error, dev loop0, sector 160523552
[ 2173.238879] blk_update_request: I/O error, dev loop0, sector 160523688
[ 2173.239241] blk_update_request: I/O error, dev loop0, sector 160523696
[ 2173.239668] blk_update_request: I/O error, dev loop0, sector 160523728
[ 2177.726055] blk_update_request: I/O error, dev loop0, sector 158598952
[ 2177.726387] blk_update_request: I/O error, dev loop0, sector 158598960
[ 2178.483778] blk_update_request: I/O error, dev loop0, sector 158488528
[ 2178.484177] blk_update_request: I/O error, dev loop0, sector 158488536
[ 2178.484454] blk_update_request: I/O error, dev loop0, sector 158488544
[ 2178.484643] blk_update_request: I/O error, dev loop0, sector 158488552
[ 2178.484831] blk_update_request: I/O error, dev loop0, sector 158488560
[ 2178.485022] blk_update_request: I/O error, dev loop0, sector 158488568
[ 2178.485209] blk_update_request: I/O error, dev loop0, sector 158488576
[ 2178.485397] blk_update_request: I/O error, dev loop0, sector 158488584
[ 2183.227593] blk_update_request: 20 callbacks suppressed
[ 2183.227599] blk_update_request: I/O error, dev loop0, sector 158599248
[ 2183.227926] blk_update_request: I/O error, dev loop0, sector 158599256
[ 2183.228471] blk_update_request: I/O error, dev loop0, sector 158599264
[ 2183.228754] blk_update_request: I/O error, dev loop0, sector 158599272
[ 2183.229192] blk_update_request: I/O error, dev loop0, sector 158599280
[ 2183.230527] blk_update_request: I/O error, dev loop0, sector 158599384
[ 2183.366003] blk_update_request: I/O error, dev loop0, sector 158599488
[ 2183.528266] blk_update_request: I/O error, dev loop0, sector 158599616
[ 2183.528671] blk_update_request: I/O error, dev loop0, sector 158599648
[ 2183.529552] blk_update_request: I/O error, dev loop0, sector 158599768
[ 2189.934967] blk_update_request: 34 callbacks suppressed
[ 2189.934972] blk_update_request: I/O error, dev loop0, sector 160524360
[ 2189.944173] blk_update_request: I/O error, dev loop0, sector 158602936
[ 2189.944679] blk_update_request: I/O error, dev loop0, sector 158602944
[ 2189.945498] blk_update_request: I/O error, dev loop0, sector 158603040
[ 2189.945655] blk_update_request: I/O error, dev loop0, sector 158603048
[ 2191.461195] blk_update_request: I/O error, dev loop0, sector 158600736
[ 2191.461580] blk_update_request: I/O error, dev loop0, sector 158600760
[ 2191.461847] blk_update_request: I/O error, dev loop0, sector 158600768
[ 2191.462073] blk_update_request: I/O error, dev loop0, sector 158489064
[ 2191.476809] blk_update_request: I/O error, dev loop0, sector 158489080
[ 2195.826743] blk_update_request: 375 callbacks suppressed
[ 2195.826746] blk_update_request: I/O error, dev loop0, sector 158603664
[ 2195.826997] blk_update_request: I/O error, dev loop0, sector 158603672
[ 2196.694170] blk_update_request: I/O error, dev loop0, sector 160525168
[ 2196.695386] blk_update_request: I/O error, dev loop0, sector 160525264
[ 2196.700680] blk_update_request: I/O error, dev loop0, sector 160525520
[ 2196.700874] blk_update_request: I/O error, dev loop0, sector 160525536
[ 2196.701080] blk_update_request: I/O error, dev loop0, sector 160525552
[ 2196.701297] blk_update_request: I/O error, dev loop0, sector 160525576
[ 2196.701477] blk_update_request: I/O error, dev loop0, sector 160525592
[ 2196.701631] blk_update_request: I/O error, dev loop0, sector 160525600
[ 2202.367030] blk_update_request: 6521 callbacks suppressed
[ 2202.367035] blk_update_request: I/O error, dev loop0, sector 158600992
[ 2202.367342] blk_update_request: I/O error, dev loop0, sector 158601000
[ 2202.367616] blk_update_request: I/O error, dev loop0, sector 158601008
[ 2202.367880] blk_update_request: I/O error, dev loop0, sector 158601016
[ 2202.368330] blk_update_request: I/O error, dev loop0, sector 158601024
[ 2202.368767] blk_update_request: I/O error, dev loop0, sector 158601032
[ 2202.384972] blk_update_request: I/O error, dev loop0, sector 158601040
[ 2202.385163] blk_update_request: I/O error, dev loop0, sector 158601048
[ 2202.385412] blk_update_request: I/O error, dev loop0, sector 158601056
[ 2202.385815] blk_update_request: I/O error, dev loop0, sector 158601080
[ 2207.881935] blk_update_request: 1541 callbacks suppressed
[ 2207.881940] blk_update_request: I/O error, dev loop0, sector 160669776
[ 2207.882457] blk_update_request: I/O error, dev loop0, sector 160669792
[ 2207.883128] blk_update_request: I/O error, dev loop0, sector 160669824
[ 2207.883804] blk_update_request: I/O error, dev loop0, sector 160669856
[ 2207.884642] blk_update_request: I/O error, dev loop0, sector 160669896
[ 2207.885326] blk_update_request: I/O error, dev loop0, sector 160669928
[ 2207.887957] blk_update_request: I/O error, dev loop0, sector 160670056
[ 2207.889078] blk_update_request: I/O error, dev loop0, sector 160670120
[ 2207.890063] blk_update_request: I/O error, dev loop0, sector 160670152
[ 2207.891155] blk_update_request: I/O error, dev loop0, sector 160670192
[ 2213.218112] blk_update_request: 903 callbacks suppressed
[ 2213.218115] blk_update_request: I/O error, dev loop0, sector 160673976
[ 2218.374328] blk_update_request: I/O error, dev loop0, sector 160674072
[ 2218.395446] blk_update_request: I/O error, dev loop0, sector 160629200
[ 2220.202246] blk_update_request: I/O error, dev loop0, sector 160538032
[ 2220.295727] blk_update_request: I/O error, dev loop0, sector 160538040
[ 2220.478294] blk_update_request: I/O error, dev loop0, sector 160538056
[ 2222.275936] blk_update_request: I/O error, dev loop0, sector 160629216
[ 2222.278182] blk_update_request: I/O error, dev loop0, sector 160629280
[ 2222.344013] blk_update_request: I/O error, dev loop0, sector 160674288
[ 2222.422756] blk_update_request: I/O error, dev loop0, sector 160629456
[ 2225.400957] blk_update_request: 25 callbacks suppressed
[ 2225.400962] blk_update_request: I/O error, dev loop0, sector 160538272
[ 2225.401190] blk_update_request: I/O error, dev loop0, sector 160538280
[ 2227.939050] blk_update_request: I/O error, dev loop0, sector 160538392
[ 2227.949112] blk_update_request: I/O error, dev loop0, sector 160538400
[ 2227.955079] blk_update_request: I/O error, dev loop0, sector 160538408
[ 2227.955310] blk_update_request: I/O error, dev loop0, sector 160538416
[ 2227.955524] blk_update_request: I/O error, dev loop0, sector 160538424
[ 2227.955796] blk_update_request: I/O error, dev loop0, sector 160538440
[ 2227.956322] blk_update_request: I/O error, dev loop0, sector 160538456
[ 2227.956538] blk_update_request: I/O error, dev loop0, sector 160538464
[ 2231.089738] blk_update_request: 10 callbacks suppressed
[ 2231.089743] blk_update_request: I/O error, dev loop0, sector 160538536
[ 2232.183058] blk_update_request: I/O error, dev loop0, sector 160630816
[ 2232.183345] blk_update_request: I/O error, dev loop0, sector 160675912
[ 2234.356741] blk_update_request: I/O error, dev loop0, sector 160670696
[ 2235.284996] blk_update_request: I/O error, dev loop0, sector 160630920
[ 2235.285704] blk_update_request: I/O error, dev loop0, sector 160630952
[ 2235.285924] blk_update_request: I/O error, dev loop0, sector 160630960
[ 2235.286190] blk_update_request: I/O error, dev loop0, sector 160630976
[ 2235.286510] blk_update_request: I/O error, dev loop0, sector 160630984
[ 2235.286720] blk_update_request: I/O error, dev loop0, sector 160630992
[ 2237.286490] blk_update_request: 2 callbacks suppressed
[ 2237.286495] blk_update_request: I/O error, dev loop0, sector 160670856
[ 2237.287422] blk_update_request: I/O error, dev loop0, sector 160670896
[ 2238.643940] blk_update_request: I/O error, dev loop0, sector 160631016
[ 2238.644588] blk_update_request: I/O error, dev loop0, sector 160631032
[ 2238.645013] blk_update_request: I/O error, dev loop0, sector 160631072
[ 2238.647246] blk_update_request: I/O error, dev loop0, sector 116289736
[ 2238.647636] blk_update_request: I/O error, dev loop0, sector 116289760
[ 2238.649115] blk_update_request: I/O error, dev loop0, sector 116289896
[ 2238.664602] blk_update_request: I/O error, dev loop0, sector 116290032
[ 2238.665031] blk_update_request: I/O error, dev loop0, sector 116290064
[ 2242.307212] blk_update_request: 324 callbacks suppressed
[ 2242.307217] blk_update_request: I/O error, dev loop0, sector 67477888
[ 2242.324166] blk_update_request: I/O error, dev loop0, sector 160638528
[ 2242.330275] blk_update_request: I/O error, dev loop0, sector 160638536
[ 2242.330492] blk_update_request: I/O error, dev loop0, sector 160638544
[ 2242.349320] blk_update_request: I/O error, dev loop0, sector 67477968
[ 2242.349597] blk_update_request: I/O error, dev loop0, sector 160638552
[ 2242.369692] blk_update_request: I/O error, dev loop0, sector 67477976
[ 2242.388167] blk_update_request: I/O error, dev loop0, sector 67477984
[ 2242.388671] blk_update_request: I/O error, dev loop0, sector 67478008
[ 2242.398358] blk_update_request: I/O error, dev loop0, sector 67478048
[ 2247.382634] blk_update_request: 710 callbacks suppressed
[ 2247.382639] blk_update_request: I/O error, dev loop0, sector 118203048
[ 2248.398377] blk_update_request: I/O error, dev loop0, sector 160641216
[ 2248.608664] blk_update_request: I/O error, dev loop0, sector 118203104
[ 2248.608991] blk_update_request: I/O error, dev loop0, sector 118203112
[ 2248.609324] blk_update_request: I/O error, dev loop0, sector 118203128
[ 2248.609594] blk_update_request: I/O error, dev loop0, sector 118203136
[ 2248.609863] blk_update_request: I/O error, dev loop0, sector 118203144
[ 2248.610277] blk_update_request: I/O error, dev loop0, sector 118203152
[ 2248.610562] blk_update_request: I/O error, dev loop0, sector 118203160
[ 2248.611000] blk_update_request: I/O error, dev loop0, sector 118203168
[ 2253.635685] blk_update_request: 228 callbacks suppressed
[ 2253.635690] blk_update_request: I/O error, dev loop0, sector 160678768
[ 2254.581967] blk_update_request: I/O error, dev loop0, sector 160642080
[ 2254.621619] blk_update_request: I/O error, dev loop0, sector 160642088
[ 2254.624442] blk_update_request: I/O error, dev loop0, sector 160686760
[ 2255.515315] blk_update_request: I/O error, dev loop0, sector 160642096
[ 2255.518378] blk_update_request: I/O error, dev loop0, sector 160642104
[ 2258.105244] blk_update_request: I/O error, dev loop0, sector 160686784
[ 2258.122115] blk_update_request: I/O error, dev loop0, sector 160686792
[ 2258.141869] blk_update_request: I/O error, dev loop0, sector 160686808
[ 2258.150115] blk_update_request: I/O error, dev loop0, sector 160682240
[ 2261.170850] blk_update_request: 188 callbacks suppressed
[ 2261.170855] blk_update_request: I/O error, dev loop0, sector 160642240
[ 2261.171176] blk_update_request: I/O error, dev loop0, sector 160642248
[ 2261.915024] blk_update_request: I/O error, dev loop0, sector 160678912
[ 2261.915515] blk_update_request: I/O error, dev loop0, sector 160678920
[ 2261.916221] blk_update_request: I/O error, dev loop0, sector 160678944
[ 2261.916478] blk_update_request: I/O error, dev loop0, sector 160678952
[ 2261.916725] blk_update_request: I/O error, dev loop0, sector 160678960
[ 2261.926360] blk_update_request: I/O error, dev loop0, sector 160679176
[ 2262.711613] blk_update_request: I/O error, dev loop0, sector 160686928
[ 2262.711806] blk_update_request: I/O error, dev loop0, sector 160686936
[ 2266.383869] blk_update_request: 132 callbacks suppressed
[ 2266.383874] blk_update_request: I/O error, dev loop0, sector 160642656
[ 2266.384313] blk_update_request: I/O error, dev loop0, sector 160642664
[ 2267.418738] blk_update_request: I/O error, dev loop0, sector 160679792
[ 2267.420442] blk_update_request: I/O error, dev loop0, sector 160679800
[ 2267.420769] blk_update_request: I/O error, dev loop0, sector 160679808
[ 2267.421224] blk_update_request: I/O error, dev loop0, sector 160679816
[ 2267.421566] blk_update_request: I/O error, dev loop0, sector 160679832
[ 2267.421769] blk_update_request: I/O error, dev loop0, sector 160679840
[ 2267.421964] blk_update_request: I/O error, dev loop0, sector 160679848
[ 2267.422225] blk_update_request: I/O error, dev loop0, sector 160642696
[ 3855.442288] blk_update_request: 79 callbacks suppressed
[ 3855.442292] blk_update_request: I/O error, dev loop0, sector 88529336
[ 3855.442561] blk_update_request: I/O error, dev loop0, sector 88529344
[ 3856.028325] blk_update_request: I/O error, dev loop0, sector 160602152
[ 3856.028785] blk_update_request: I/O error, dev loop0, sector 88529384
[ 3856.029021] blk_update_request: I/O error, dev loop0, sector 88529392
[ 3856.029201] blk_update_request: I/O error, dev loop0, sector 88529400
[ 3856.029560] blk_update_request: I/O error, dev loop0, sector 88529408
[ 3856.029867] blk_update_request: I/O error, dev loop0, sector 88529432
[ 3856.031632] blk_update_request: I/O error, dev loop0, sector 88529544
[ 3856.032152] blk_update_request: I/O error, dev loop0, sector 88529568
[ 3861.203654] blk_update_request: 571 callbacks suppressed
[ 3861.203658] blk_update_request: I/O error, dev loop0, sector 84350240
[ 3861.203904] blk_update_request: I/O error, dev loop0, sector 160603544
[ 3861.204194] blk_update_request: I/O error, dev loop0, sector 160603552
[ 3861.204387] blk_update_request: I/O error, dev loop0, sector 160603560
[ 3861.204699] blk_update_request: I/O error, dev loop0, sector 160603568
[ 3861.204869] blk_update_request: I/O error, dev loop0, sector 160608248
[ 3861.205044] blk_update_request: I/O error, dev loop0, sector 67519016
[ 3861.205215] blk_update_request: I/O error, dev loop0, sector 67519248
[ 3861.205390] blk_update_request: I/O error, dev loop0, sector 67519256
[ 3861.206523] blk_update_request: I/O error, dev loop0, sector 218382576
[ 3906.461647] blk_update_request: 32 callbacks suppressed
[ 3906.461652] blk_update_request: I/O error, dev loop0, sector 118221032
[ 3906.463514] blk_update_request: I/O error, dev loop0, sector 118221080
[ 3906.463778] blk_update_request: I/O error, dev loop0, sector 118221096
[ 3906.464581] blk_update_request: I/O error, dev loop0, sector 118221176
[ 3906.464896] blk_update_request: I/O error, dev loop0, sector 118221200
[ 3906.465139] blk_update_request: I/O error, dev loop0, sector 118221216
[ 3906.465384] blk_update_request: I/O error, dev loop0, sector 118221224
[ 3906.465765] blk_update_request: I/O error, dev loop0, sector 118221256
[ 3906.466045] blk_update_request: I/O error, dev loop0, sector 118221272
[ 3906.466356] blk_update_request: I/O error, dev loop0, sector 118221296
[ 4042.077321] blk_update_request: 170 callbacks suppressed
[ 4042.077325] blk_update_request: I/O error, dev loop0, sector 160735216
[ 4042.077595] blk_update_request: I/O error, dev loop0, sector 88581488
[ 4042.203353] blk_update_request: I/O error, dev loop0, sector 88581504
[ 4042.203773] blk_update_request: I/O error, dev loop0, sector 88581536
[ 4042.204133] blk_update_request: I/O error, dev loop0, sector 88581544
[ 4042.204341] blk_update_request: I/O error, dev loop0, sector 88581552
[ 4042.204508] blk_update_request: I/O error, dev loop0, sector 88581560
[ 4042.204677] blk_update_request: I/O error, dev loop0, sector 88581568
[ 4042.204846] blk_update_request: I/O error, dev loop0, sector 88581576
[ 4042.205008] blk_update_request: I/O error, dev loop0, sector 88581584

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https://bugs.launchpad.net/bugs/1526537

Title:
  blk_update_request: I/O error

Status in linux package in Ubuntu:
  Expired

Bug description:
  
  On my laptop I am using the ubuntu in persistent mode with a backing files: casper-rw, home-rw. For some time in the new editions of ubuntu [ 15.04 / 15.10 / 16.04 daily (15.12) ] I meet with error: blk_update_request: I/O error, dev loop ... , sector ... .  am sure it is not a hardware problem. Please, could you try reproduce this issue 

  `/proc/cmdline`

  BOOT_IMAGE=/Ubuntu/16.04/desktop-amd64/casper/vmlinuz.efi append
  noprompt boot=casper intel_iommu=on toram showmounts persistent-
  path=/Ubuntu/16.04/desktop-amd64 persistent iso-
  scan/filename=/Ubuntu/16.04/xenial-desktop-amd64.iso cdrom-detect/try-
  usb=true

  `kern.log`

  Dec 15 21:49:25 ThinkPad kernel: [   11.507021] Bluetooth: BNEP socket layer initialized
  Dec 15 21:49:25 ThinkPad kernel: [   11.513208] blk_update_request: I/O error, dev loop0, sector 1376280
  Dec 15 21:49:25 ThinkPad kernel: [   11.544996] blk_update_request: I/O error, dev loop0, sector 1364008
  Dec 15 21:49:26 ThinkPad kernel: [   11.655626] IPv6: ADDRCONF(NETDEV_UP): wlp3s0: link is not ready
  Dec 15 21:49:26 ThinkPad kernel: [   11.656563] IPv6: ADDRCONF(NETDEV_UP): enp0s25: link is not ready
  Dec 15 21:49:26 ThinkPad kernel: [   11.884604] IPv6: ADDRCONF(NETDEV_UP): enp0s25: link is not ready
  Dec 15 21:49:26 ThinkPad kernel: [   12.080950] usbcore: registered new interface driver cdc_wdm
  Dec 15 21:49:26 ThinkPad kernel: [   12.089352] qmi_wwan 2-1.4:1.0: cdc-wdm0: USB WDM device
  Dec 15 21:49:26 ThinkPad kernel: [   12.089629] qmi_wwan 2-1.4:1.0 wwan0: register 'qmi_wwan' at usb-0000:00:1d.0-1.4, WWAN/QMI device, 86:f3:f1:57:ac:04
  Dec 15 21:49:26 ThinkPad kernel: [   12.089851] usbcore: registered new interface driver qmi_wwan
  Dec 15 21:49:27 ThinkPad kernel: [   13.014113] blk_update_request: I/O error, dev loop2, sector 776360
  Dec 15 21:49:27 ThinkPad kernel: [   13.026856] blk_update_request: I/O error, dev loop2, sector 777792
  Dec 15 21:49:27 ThinkPad kernel: [   13.406901] e1000e: enp0s25 NIC Link is Up 100 Mbps Full Duplex, Flow Control: Rx/Tx
  Dec 15 21:49:27 ThinkPad kernel: [   13.406909] e1000e 0000:00:19.0 enp0s25: 10/100 speed: disabling TSO
  Dec 15 21:49:27 ThinkPad kernel: [   13.406948] IPv6: ADDRCONF(NETDEV_CHANGE): enp0s25: link becomes ready
  Dec 15 21:49:27 ThinkPad kernel: [   13.411598] blk_update_request: I/O error, dev loop0, sector 1364024
  Dec 15 21:49:27 ThinkPad kernel: [   13.525480] blk_update_request: I/O error, dev loop2, sector 778064
  Dec 15 21:49:28 ThinkPad kernel: [   13.733896] Bluetooth: RFCOMM TTY layer initialized
  Dec 15 21:49:28 ThinkPad kernel: [   13.733906] Bluetooth: RFCOMM socket layer initialized
  Dec 15 21:49:28 ThinkPad kernel: [   13.733912] Bluetooth: RFCOMM ver 1.11
  Dec 15 21:49:28 ThinkPad kernel: [   13.758583] blk_update_request: I/O error, dev loop0, sector 1360048
  Dec 15 21:49:28 ThinkPad kernel: [   13.765377] blk_update_request: I/O error, dev loop0, sector 1364032
  Dec 15 21:49:28 ThinkPad kernel: [   13.778920] blk_update_request: I/O error, dev loop0, sector 1364040
  Dec 15 21:49:28 ThinkPad kernel: [   13.785037] blk_update_request: I/O error, dev loop0, sector 1364048
  Dec 15 21:49:28 ThinkPad gnome-session-binary[3083]: Entering running state
  Dec 15 21:49:37 ThinkPad kernel: [   22.759620] blk_update_request: 15 callbacks suppressed
  Dec 15 21:49:37 ThinkPad kernel: [   22.759623] blk_update_request: I/O error, dev loop0, sector 1364072
  Dec 15 21:49:37 ThinkPad kernel: [   22.803618] hidraw: raw HID events driver (C) Jiri Kosina
  Dec 15 21:49:37 ThinkPad kernel: [   22.806751] Bluetooth: HIDP (Human Interface Emulation) ver 1.2
  Dec 15 21:49:37 ThinkPad kernel: [   22.806758] Bluetooth: HIDP socket layer initialized
  Dec 15 21:49:37 ThinkPad kernel: [   22.811095] hid-generic 0005:0D62:01BF.0001: unknown main item tag 0x0
  Dec 15 21:49:37 ThinkPad kernel: [   22.811211] input: Bluetooth Mouse as /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.4/1-1.4:1.0/bluetooth/hci0/hci0:11/0005:0D62:01BF.0001/input/input17
  Dec 15 21:49:37 ThinkPad kernel: [   22.811384] hid-generic 0005:0D62:01BF.0001: input,hidraw0: BLUETOOTH HID v1.39 Mouse [ Bluetooth Mouse] on ec:55:f9:fa:c6:1d
  Dec 15 21:50:41 ThinkPad kernel: [   86.683594] blk_update_request: I/O error, dev loop2, sector 2343552
  Dec 15 21:50:41 ThinkPad kernel: [   86.690626] blk_update_request: I/O error, dev loop2, sector 2339064
  Dec 15 21:50:41 ThinkPad kernel: [   86.703606] blk_update_request: I/O error, dev loop2, sector 2057600
  Dec 15 21:50:41 ThinkPad kernel: [   86.713265] blk_update_request: I/O error, dev loop2, sector 2343592
  Dec 15 21:50:41 ThinkPad kernel: [   86.715556] blk_update_request: I/O error, dev loop2, sector 2057608
  Dec 15 21:50:41 ThinkPad kernel: [   86.861531] blk_update_request: I/O error, dev loop2, sector 2339104
  Dec 15 21:50:42 ThinkPad kernel: [   87.954169] blk_update_request: I/O error, dev loop2, sector 2343632
  --- 
  ApportVersion: 2.19.3-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  marcin     3226 F.... pulseaudio
  CasperVersion: 1.366
  DistroRelease: Ubuntu 16.04
  LiveMediaBuild: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20151202)
  MachineType: LENOVO 4291PR5
  Package: linux (not installed)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/Ubuntu/16.04/desktop-amd64/casper/vmlinuz.efi append noprompt boot=casper intel_iommu=on toram showmounts persistent-path=/Ubuntu/16.04/desktop-amd64 persistent userfullname=MarcinCelebucki username=marcin hostname=hostname iso-scan/filename=/Ubuntu/16.04/xenial-desktop-amd64.iso cdrom-detect/try-usb=true
  ProcVersionSignature: Ubuntu 4.2.0-19.23-generic 4.2.6
  PulseList:
   Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
   No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-4.2.0-19-generic N/A
   linux-backports-modules-4.2.0-19-generic  N/A
   linux-firmware                            1.154
  Tags:  xenial
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  Uname: Linux 4.2.0-19-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:
   
  _MarkForUpload: True
  dmi.bios.date: 05/14/2015
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 8DET70WW (1.40 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 4291PR5
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvr8DET70WW(1.40):bd05/14/2015:svnLENOVO:pn4291PR5:pvrThinkPadX220:rvnLENOVO:rn4291PR5:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 4291PR5
  dmi.product.version: ThinkPad X220
  dmi.sys.vendor: LENOVO

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References

[Bug 1526537] [NEW] blk_update_request: I/O error
From: Marcin, 2015-12-15