kernel-packages team mailing list archive

[Gabriel Pérez <1460402@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Happens in two nodes at the same time.

Node 1:

[205458.631304] ------------[ cut here ]------------
[205458.633636] kernel BUG at /build/buildd/linux-3.13.0/fs/fscache/page.c:244!
[205458.633636] invalid opcode: 0000 [#1] SMP 
[205458.633636] Modules linked in: veth xt_nat xt_tcpudp xt_addrtype xt_conntrack ipt_MASQUERADE iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 iptable_filter ip_tables x_tables nf_nat nf_conntrack bridge stp llc dm_thin_pool dm_persistent_data dm_bufio dm_bio_prison libcrc32c cachefiles nfsv3 nfsd auth_rpcgss nfs_acl nfs lockd sunrpc fscache dm_crypt syscopyarea sysfillrect sysimgblt fb_sys_fops serio_raw isofs crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
[205458.633636] CPU: 3 PID: 6217 Comm: php5-fpm Not tainted 3.13.0-53-generic #89-Ubuntu
[205458.633636] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/06/2015
[205458.633636] task: ffff8801e3ede000 ti: ffff880107ace000 task.ti: ffff880107ace000
[205458.633636] RIP: 0010:[<ffffffffa00b8c14>]  [<ffffffffa00b8c14>] fscache_release_retrieval_op+0x74/0x80 [fscache]
[205458.633636] RSP: 0018:ffff880107acfad8  EFLAGS: 00010286
[205458.633636] RAX: 000000000000000f RBX: ffff880014be1a80 RCX: 0000000000000000
[205458.633636] RDX: ffff8801efc6f020 RSI: ffff8801efc6d408 RDI: 0000000000000246
[205458.633636] RBP: ffff880107acfae0 R08: 0000000000000096 R09: 0000000000000231
[205458.633636] R10: ffffffff8185ade0 R11: ffff880107acf806 R12: ffff8800c3e469f8
[205458.633636] R13: ffff880107acfbbc R14: 00000000ffffff97 R15: ffff8801e3ff9b68
[205458.633636] FS:  00007f383346c740(0000) GS:ffff8801efc60000(0000) knlGS:0000000000000000
[205458.633636] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[205458.633636] CR2: 00007f382032cf08 CR3: 00000001206ea000 CR4: 00000000001406e0
[205458.633636] Stack:
[205458.633636]  ffff880014be1a80 ffff880107acfb08 ffffffffa00b6eab ffff880014be1a80
[205458.633636]  ffff8800c3e469f8 ffff880107acfbbc ffff880107acfb58 ffffffffa00b9753
[205458.633636]  ffff8800c3e46a00 ffff8801e3ff9b00 ffff880107acfcb8 00000000ffffff97
[205458.633636] Call Trace:
[205458.633636]  [<ffffffffa00b6eab>] fscache_put_operation+0x5b/0x220 [fscache]
[205458.633636]  [<ffffffffa00b9753>] __fscache_read_or_alloc_pages+0x1b3/0x350 [fscache]
[205458.633636]  [<ffffffffa01645c1>] __nfs_readpages_from_fscache+0x71/0x1b0 [nfs]
[205458.633636]  [<ffffffffa015b7b8>] nfs_readpages+0xa8/0x190 [nfs]
[205458.633636]  [<ffffffff81197c53>] ? alloc_pages_current+0xa3/0x160
[205458.633636]  [<ffffffff8114f757>] ? __page_cache_alloc+0x97/0xc0
[205458.633636]  [<ffffffff8115ba39>] __do_page_cache_readahead+0x1b9/0x260
[205458.633636]  [<ffffffff8115bf12>] ondemand_readahead+0x152/0x2a0
[205458.633636]  [<ffffffff8115c091>] page_cache_sync_readahead+0x31/0x50
[205458.633636]  [<ffffffff81151b65>] generic_file_aio_read+0x4c5/0x700
[205458.633636]  [<ffffffffa0150949>] nfs_file_read+0x69/0xf0 [nfs]
[205458.633636]  [<ffffffff811bd8ba>] do_sync_read+0x5a/0x90
[205458.633636]  [<ffffffff811bdf55>] vfs_read+0x95/0x160
[205458.633636]  [<ffffffff811bea69>] SyS_read+0x49/0xa0
[205458.633636]  [<ffffffff8173391d>] system_call_fastpath+0x1a/0x1f
[205458.633636] Code: c0 e8 92 3b 66 e1 48 c7 c7 ae cc 0b a0 31 c0 e8 84 3b 66 e1 48 63 b3 90 00 00 00 31 d2 48 c7 c7 e3 cc 0b a0 31 c0 e8 6d 3b 66 e1 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 
[205458.633636] RIP  [<ffffffffa00b8c14>] fscache_release_retrieval_op+0x74/0x80 [fscache]
[205458.633636]  RSP <ffff880107acfad8>
[205458.833163] ---[ end trace 30960a6ba86a197f ]---

Node 2:

[360136.745210] FS-Cache: Assertion failed
[360136.747121] 1 == 0 is false
[360136.748704] ------------[ cut here ]------------
[360136.751217] kernel BUG at /build/buildd/linux-3.13.0/fs/fscache/page.c:244!
[360136.752666] invalid opcode: 0000 [#1] SMP 
[360136.752666] Modules linked in: veth xt_nat xt_tcpudp xt_addrtype xt_conntrack ipt_MASQUERADE iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 iptable_filter ip_tables x_tables nf_nat nf_conntrack bridge stp llc dm_thin_pool dm_persistent_data dm_bufio dm_bio_prison libcrc32c cachefiles nfsv3 nfsd auth_rpcgss nfs_acl nfs lockd sunrpc fscache dm_crypt syscopyarea sysfillrect sysimgblt fb_sys_fops serio_raw isofs crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd psmouse floppy
[360136.752666] CPU: 2 PID: 7105 Comm: php5-fpm Not tainted 3.13.0-53-generic #89-Ubuntu
[360136.752666] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/06/2015
[360136.752666] task: ffff880116254800 ti: ffff88010cb8a000 task.ti: ffff88010cb8a000
[360136.752666] RIP: 0010:[<ffffffffa00b1c14>]  [<ffffffffa00b1c14>] fscache_release_retrieval_op+0x74/0x80 [fscache]
[360136.752666] RSP: 0018:ffff88010cb8bad8  EFLAGS: 00010286
[360136.752666] RAX: 000000000000000f RBX: ffff88001fa9a300 RCX: 0000000000000006
[360136.752666] RDX: 0000000000000007 RSI: 000000004cae4cac RDI: 0000000000000246
[360136.752666] RBP: ffff88010cb8bae0 R08: 0000000000000096 R09: 0000000000000239
[360136.752666] R10: ffffffff8185ade0 R11: ffff88010cb8b806 R12: ffff8800d4e4ae18
[360136.752666] R13: ffff88010cb8bbbc R14: 00000000ffffff97 R15: ffff88008df750e8
[360136.752666] FS:  00007f4233932740(0000) GS:ffff8801efc40000(0000) knlGS:0000000000000000
[360136.752666] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[360136.752666] CR2: 00000000040e9008 CR3: 000000010de9c000 CR4: 00000000001406e0
[360136.752666] Stack:
[360136.752666]  ffff88001fa9a300 ffff88010cb8bb08 ffffffffa00afeab ffff88001fa9a300
[360136.752666]  ffff8800d4e4ae18 ffff88010cb8bbbc ffff88010cb8bb58 ffffffffa00b2753
[360136.752666]  ffff8800d4e4ae20 ffff88008df75080 ffff88010cb8bcb8 00000000ffffff97
[360136.752666] Call Trace:
[360136.752666]  [<ffffffffa00afeab>] fscache_put_operation+0x5b/0x220 [fscache]
[360136.752666]  [<ffffffffa00b2753>] __fscache_read_or_alloc_pages+0x1b3/0x350 [fscache]
[360136.752666]  [<ffffffffa015d5c1>] __nfs_readpages_from_fscache+0x71/0x1b0 [nfs]
[360136.752666]  [<ffffffffa01547b8>] nfs_readpages+0xa8/0x190 [nfs]
[360136.752666]  [<ffffffff81197c53>] ? alloc_pages_current+0xa3/0x160
[360136.752666]  [<ffffffff8114f757>] ? __page_cache_alloc+0x97/0xc0
[360136.752666]  [<ffffffff8115ba39>] __do_page_cache_readahead+0x1b9/0x260
[360136.752666]  [<ffffffff8115bf12>] ondemand_readahead+0x152/0x2a0
[360136.752666]  [<ffffffff8115c091>] page_cache_sync_readahead+0x31/0x50
[360136.752666]  [<ffffffff81151b65>] generic_file_aio_read+0x4c5/0x700
[360136.752666]  [<ffffffffa0149949>] nfs_file_read+0x69/0xf0 [nfs]
[360136.752666]  [<ffffffff811bd8ba>] do_sync_read+0x5a/0x90
[360136.752666]  [<ffffffff811bdf55>] vfs_read+0x95/0x160
[360136.752666]  [<ffffffff811bea69>] SyS_read+0x49/0xa0
[360136.752666]  [<ffffffff8173391d>] system_call_fastpath+0x1a/0x1f
[360136.752666] Code: c0 e8 92 ab 66 e1 48 c7 c7 ae 5c 0b a0 31 c0 e8 84 ab 66 e1 48 63 b3 90 00 00 00 31 d2 48 c7 c7 e3 5c 0b a0 31 c0 e8 6d ab 66 e1 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 
[360136.752666] RIP  [<ffffffffa00b1c14>] fscache_release_retrieval_op+0x74/0x80 [fscache]
[360136.752666]  RSP <ffff88010cb8bad8>
[360136.935505] ---[ end trace 5e0dd6a39f65225d ]---
[361660.951453] 
[361660.952687] FS-Cache: Assertion failed
[361660.954870] 1 == 0 is false
[361660.956679] ------------[ cut here ]------------
[361660.959155] kernel BUG at /build/buildd/linux-3.13.0/fs/fscache/page.c:244!
[361660.960653] invalid opcode: 0000 [#2] SMP 
[361660.960653] Modules linked in: veth xt_nat xt_tcpudp xt_addrtype xt_conntrack ipt_MASQUERADE iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 iptable_filter ip_tables x_tables nf_nat nf_conntrack bridge stp llc dm_thin_pool dm_persistent_data dm_bufio dm_bio_prison libcrc32c cachefiles nfsv3 nfsd auth_rpcgss nfs_acl nfs lockd sunrpc fscache dm_crypt syscopyarea sysfillrect sysimgblt fb_sys_fops serio_raw isofs crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd psmouse floppy
[361660.960653] CPU: 0 PID: 7839 Comm: php5-fpm Tainted: G      D       3.13.0-53-generic #89-Ubuntu
[361660.960653] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/06/2015
[361660.960653] task: ffff8800094c0000 ti: ffff880007daa000 task.ti: ffff880007daa000
[361660.960653] RIP: 0010:[<ffffffffa00b1c14>]  [<ffffffffa00b1c14>] fscache_release_retrieval_op+0x74/0x80 [fscache]
[361660.960653] RSP: 0018:ffff880007dabad8  EFLAGS: 00010286
[361660.960653] RAX: 000000000000000f RBX: ffff88000903be40 RCX: 0000000000000006
[361660.960653] RDX: 0000000000000007 RSI: 0000000053625360 RDI: 0000000000000246
[361660.960653] RBP: ffff880007dabae0 R08: 0000000000000096 R09: 0000000000000265
[361660.960653] R10: ffffffff8185ade0 R11: ffff880007dab806 R12: ffff8800117e3aa8
[361660.960653] R13: ffff880007dabbbc R14: 00000000ffffff97 R15: ffff8800e7b707e8
[361660.960653] FS:  00007f4233932740(0000) GS:ffff8801efc00000(0000) knlGS:0000000000000000
[361660.960653] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[361660.960653] CR2: 00007faa5c88e208 CR3: 000000001fbe0000 CR4: 00000000001406f0
[361660.960653] Stack:
[361660.960653]  ffff88000903be40 ffff880007dabb08 ffffffffa00afeab ffff88000903be40
[361660.960653]  ffff8800117e3aa8 ffff880007dabbbc ffff880007dabb58 ffffffffa00b2753
[361660.960653]  ffff8800117e3ab0 ffff8800e7b70780 ffff880007dabcb8 00000000ffffff97
[361660.960653] Call Trace:
[361660.960653]  [<ffffffffa00afeab>] fscache_put_operation+0x5b/0x220 [fscache]
[361660.960653]  [<ffffffffa00b2753>] __fscache_read_or_alloc_pages+0x1b3/0x350 [fscache]
[361660.960653]  [<ffffffffa015d5c1>] __nfs_readpages_from_fscache+0x71/0x1b0 [nfs]
[361660.960653]  [<ffffffffa01547b8>] nfs_readpages+0xa8/0x190 [nfs]
[361660.960653]  [<ffffffff81197c53>] ? alloc_pages_current+0xa3/0x160
[361660.960653]  [<ffffffff8114f757>] ? __page_cache_alloc+0x97/0xc0
[361660.960653]  [<ffffffff8115ba39>] __do_page_cache_readahead+0x1b9/0x260
[361660.960653]  [<ffffffff8115bf12>] ondemand_readahead+0x152/0x2a0
[361660.960653]  [<ffffffff8115c091>] page_cache_sync_readahead+0x31/0x50
[361660.960653]  [<ffffffff81151b65>] generic_file_aio_read+0x4c5/0x700
[361660.960653]  [<ffffffffa0149949>] nfs_file_read+0x69/0xf0 [nfs]
[361660.960653]  [<ffffffff811bd8ba>] do_sync_read+0x5a/0x90
[361660.960653]  [<ffffffff811bdf55>] vfs_read+0x95/0x160
[361660.960653]  [<ffffffff811bea69>] SyS_read+0x49/0xa0
[361660.960653]  [<ffffffff8173391d>] system_call_fastpath+0x1a/0x1f
[361660.960653] Code: c0 e8 92 ab 66 e1 48 c7 c7 ae 5c 0b a0 31 c0 e8 84 ab 66 e1 48 63 b3 90 00 00 00 31 d2 48 c7 c7 e3 5c 0b a0 31 c0 e8 6d ab 66 e1 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 
[361660.960653] RIP  [<ffffffffa00b1c14>] fscache_release_retrieval_op+0x74/0x80 [fscache]
[361660.960653]  RSP <ffff880007dabad8>
[361661.134212] ---[ end trace 5e0dd6a39f65225e ]---
[363766.284093] 
[363766.285960] FS-Cache: Assertion failed
[363766.289822] 1 == 0 is false
[363766.292641] ------------[ cut here ]------------
[363766.295666] kernel BUG at /build/buildd/linux-3.13.0/fs/fscache/page.c:244!
[363766.296609] invalid opcode: 0000 [#3] SMP 
[363766.296609] Modules linked in: veth xt_nat xt_tcpudp xt_addrtype xt_conntrack ipt_MASQUERADE iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 iptable_filter ip_tables x_tables nf_nat nf_conntrack bridge stp llc dm_thin_pool dm_persistent_data dm_bufio dm_bio_prison libcrc32c cachefiles nfsv3 nfsd auth_rpcgss nfs_acl nfs lockd sunrpc fscache dm_crypt syscopyarea sysfillrect sysimgblt fb_sys_fops serio_raw isofs crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd psmouse floppy
[363766.296609] CPU: 0 PID: 8794 Comm: php5-fpm Tainted: G      D       3.13.0-53-generic #89-Ubuntu
[363766.296609] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/06/2015
[363766.296609] task: ffff88003704b000 ti: ffff8801025ce000 task.ti: ffff8801025ce000
[363766.296609] RIP: 0010:[<ffffffffa00b1c14>]  [<ffffffffa00b1c14>] fscache_release_retrieval_op+0x74/0x80 [fscache]
[363766.296609] RSP: 0018:ffff8801025cfad8  EFLAGS: 00010286
[363766.296609] RAX: 000000000000000f RBX: ffff880105a92780 RCX: 0000000000000000
[363766.296609] RDX: ffff8801efc0f020 RSI: ffff8801efc0d408 RDI: 0000000000000246
[363766.296609] RBP: ffff8801025cfae0 R08: 0000000000000096 R09: 0000000000000291
[363766.296609] R10: ffffffff8185ade0 R11: ffff8801025cf806 R12: ffff8800117e3aa8
[363766.296609] R13: ffff8801025cfbbc R14: 00000000ffffff97 R15: ffff8800e7b707e8
[363766.296609] FS:  00007f4233932740(0000) GS:ffff8801efc00000(0000) knlGS:0000000000000000
[363766.296609] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[363766.296609] CR2: 00000000030ba160 CR3: 0000000100915000 CR4: 00000000001406f0
[363766.296609] Stack:
[363766.296609]  ffff880105a92780 ffff8801025cfb08 ffffffffa00afeab ffff880105a92780
[363766.296609]  ffff8800117e3aa8 ffff8801025cfbbc ffff8801025cfb58 ffffffffa00b2753
[363766.296609]  ffff8800117e3ab0 ffff8800e7b70780 ffff8801025cfcb8 00000000ffffff97
[363766.296609] Call Trace:
[363766.296609]  [<ffffffffa00afeab>] fscache_put_operation+0x5b/0x220 [fscache]
[363766.296609]  [<ffffffffa00b2753>] __fscache_read_or_alloc_pages+0x1b3/0x350 [fscache]
[363766.296609]  [<ffffffffa015d5c1>] __nfs_readpages_from_fscache+0x71/0x1b0 [nfs]
[363766.296609]  [<ffffffffa01547b8>] nfs_readpages+0xa8/0x190 [nfs]
[363766.296609]  [<ffffffff81197c53>] ? alloc_pages_current+0xa3/0x160
[363766.296609]  [<ffffffff8114f757>] ? __page_cache_alloc+0x97/0xc0
[363766.296609]  [<ffffffff8115ba39>] __do_page_cache_readahead+0x1b9/0x260
[363766.296609]  [<ffffffff8115bf12>] ondemand_readahead+0x152/0x2a0
[363766.296609]  [<ffffffff8115c091>] page_cache_sync_readahead+0x31/0x50
[363766.296609]  [<ffffffff81151b65>] generic_file_aio_read+0x4c5/0x700
[363766.296609]  [<ffffffffa0149949>] nfs_file_read+0x69/0xf0 [nfs]
[363766.296609]  [<ffffffff811bd8ba>] do_sync_read+0x5a/0x90
[363766.296609]  [<ffffffff811bdf55>] vfs_read+0x95/0x160
[363766.296609]  [<ffffffff811bea69>] SyS_read+0x49/0xa0
[363766.296609]  [<ffffffff8173391d>] system_call_fastpath+0x1a/0x1f
[363766.296609] Code: c0 e8 92 ab 66 e1 48 c7 c7 ae 5c 0b a0 31 c0 e8 84 ab 66 e1 48 63 b3 90 00 00 00 31 d2 48 c7 c7 e3 5c 0b a0 31 c0 e8 6d ab 66 e1 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 
[363766.296609] RIP  [<ffffffffa00b1c14>] fscache_release_retrieval_op+0x74/0x80 [fscache]
[363766.296609]  RSP <ffff8801025cfad8>
[363766.499901] ---[ end trace 5e0dd6a39f65225f ]---

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: fs-cache

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https://bugs.launchpad.net/bugs/1460402

Title:
  FS-Cache: Assertion failed

Status in linux package in Ubuntu:
  New

Bug description:
  Happens in two nodes at the same time.

  Node 1:

  [205458.631304] ------------[ cut here ]------------
  [205458.633636] kernel BUG at /build/buildd/linux-3.13.0/fs/fscache/page.c:244!
  [205458.633636] invalid opcode: 0000 [#1] SMP 
  [205458.633636] Modules linked in: veth xt_nat xt_tcpudp xt_addrtype xt_conntrack ipt_MASQUERADE iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 iptable_filter ip_tables x_tables nf_nat nf_conntrack bridge stp llc dm_thin_pool dm_persistent_data dm_bufio dm_bio_prison libcrc32c cachefiles nfsv3 nfsd auth_rpcgss nfs_acl nfs lockd sunrpc fscache dm_crypt syscopyarea sysfillrect sysimgblt fb_sys_fops serio_raw isofs crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd floppy psmouse
  [205458.633636] CPU: 3 PID: 6217 Comm: php5-fpm Not tainted 3.13.0-53-generic #89-Ubuntu
  [205458.633636] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/06/2015
  [205458.633636] task: ffff8801e3ede000 ti: ffff880107ace000 task.ti: ffff880107ace000
  [205458.633636] RIP: 0010:[<ffffffffa00b8c14>]  [<ffffffffa00b8c14>] fscache_release_retrieval_op+0x74/0x80 [fscache]
  [205458.633636] RSP: 0018:ffff880107acfad8  EFLAGS: 00010286
  [205458.633636] RAX: 000000000000000f RBX: ffff880014be1a80 RCX: 0000000000000000
  [205458.633636] RDX: ffff8801efc6f020 RSI: ffff8801efc6d408 RDI: 0000000000000246
  [205458.633636] RBP: ffff880107acfae0 R08: 0000000000000096 R09: 0000000000000231
  [205458.633636] R10: ffffffff8185ade0 R11: ffff880107acf806 R12: ffff8800c3e469f8
  [205458.633636] R13: ffff880107acfbbc R14: 00000000ffffff97 R15: ffff8801e3ff9b68
  [205458.633636] FS:  00007f383346c740(0000) GS:ffff8801efc60000(0000) knlGS:0000000000000000
  [205458.633636] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  [205458.633636] CR2: 00007f382032cf08 CR3: 00000001206ea000 CR4: 00000000001406e0
  [205458.633636] Stack:
  [205458.633636]  ffff880014be1a80 ffff880107acfb08 ffffffffa00b6eab ffff880014be1a80
  [205458.633636]  ffff8800c3e469f8 ffff880107acfbbc ffff880107acfb58 ffffffffa00b9753
  [205458.633636]  ffff8800c3e46a00 ffff8801e3ff9b00 ffff880107acfcb8 00000000ffffff97
  [205458.633636] Call Trace:
  [205458.633636]  [<ffffffffa00b6eab>] fscache_put_operation+0x5b/0x220 [fscache]
  [205458.633636]  [<ffffffffa00b9753>] __fscache_read_or_alloc_pages+0x1b3/0x350 [fscache]
  [205458.633636]  [<ffffffffa01645c1>] __nfs_readpages_from_fscache+0x71/0x1b0 [nfs]
  [205458.633636]  [<ffffffffa015b7b8>] nfs_readpages+0xa8/0x190 [nfs]
  [205458.633636]  [<ffffffff81197c53>] ? alloc_pages_current+0xa3/0x160
  [205458.633636]  [<ffffffff8114f757>] ? __page_cache_alloc+0x97/0xc0
  [205458.633636]  [<ffffffff8115ba39>] __do_page_cache_readahead+0x1b9/0x260
  [205458.633636]  [<ffffffff8115bf12>] ondemand_readahead+0x152/0x2a0
  [205458.633636]  [<ffffffff8115c091>] page_cache_sync_readahead+0x31/0x50
  [205458.633636]  [<ffffffff81151b65>] generic_file_aio_read+0x4c5/0x700
  [205458.633636]  [<ffffffffa0150949>] nfs_file_read+0x69/0xf0 [nfs]
  [205458.633636]  [<ffffffff811bd8ba>] do_sync_read+0x5a/0x90
  [205458.633636]  [<ffffffff811bdf55>] vfs_read+0x95/0x160
  [205458.633636]  [<ffffffff811bea69>] SyS_read+0x49/0xa0
  [205458.633636]  [<ffffffff8173391d>] system_call_fastpath+0x1a/0x1f
  [205458.633636] Code: c0 e8 92 3b 66 e1 48 c7 c7 ae cc 0b a0 31 c0 e8 84 3b 66 e1 48 63 b3 90 00 00 00 31 d2 48 c7 c7 e3 cc 0b a0 31 c0 e8 6d 3b 66 e1 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 
  [205458.633636] RIP  [<ffffffffa00b8c14>] fscache_release_retrieval_op+0x74/0x80 [fscache]
  [205458.633636]  RSP <ffff880107acfad8>
  [205458.833163] ---[ end trace 30960a6ba86a197f ]---

  Node 2:

  [360136.745210] FS-Cache: Assertion failed
  [360136.747121] 1 == 0 is false
  [360136.748704] ------------[ cut here ]------------
  [360136.751217] kernel BUG at /build/buildd/linux-3.13.0/fs/fscache/page.c:244!
  [360136.752666] invalid opcode: 0000 [#1] SMP 
  [360136.752666] Modules linked in: veth xt_nat xt_tcpudp xt_addrtype xt_conntrack ipt_MASQUERADE iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 iptable_filter ip_tables x_tables nf_nat nf_conntrack bridge stp llc dm_thin_pool dm_persistent_data dm_bufio dm_bio_prison libcrc32c cachefiles nfsv3 nfsd auth_rpcgss nfs_acl nfs lockd sunrpc fscache dm_crypt syscopyarea sysfillrect sysimgblt fb_sys_fops serio_raw isofs crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd psmouse floppy
  [360136.752666] CPU: 2 PID: 7105 Comm: php5-fpm Not tainted 3.13.0-53-generic #89-Ubuntu
  [360136.752666] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/06/2015
  [360136.752666] task: ffff880116254800 ti: ffff88010cb8a000 task.ti: ffff88010cb8a000
  [360136.752666] RIP: 0010:[<ffffffffa00b1c14>]  [<ffffffffa00b1c14>] fscache_release_retrieval_op+0x74/0x80 [fscache]
  [360136.752666] RSP: 0018:ffff88010cb8bad8  EFLAGS: 00010286
  [360136.752666] RAX: 000000000000000f RBX: ffff88001fa9a300 RCX: 0000000000000006
  [360136.752666] RDX: 0000000000000007 RSI: 000000004cae4cac RDI: 0000000000000246
  [360136.752666] RBP: ffff88010cb8bae0 R08: 0000000000000096 R09: 0000000000000239
  [360136.752666] R10: ffffffff8185ade0 R11: ffff88010cb8b806 R12: ffff8800d4e4ae18
  [360136.752666] R13: ffff88010cb8bbbc R14: 00000000ffffff97 R15: ffff88008df750e8
  [360136.752666] FS:  00007f4233932740(0000) GS:ffff8801efc40000(0000) knlGS:0000000000000000
  [360136.752666] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  [360136.752666] CR2: 00000000040e9008 CR3: 000000010de9c000 CR4: 00000000001406e0
  [360136.752666] Stack:
  [360136.752666]  ffff88001fa9a300 ffff88010cb8bb08 ffffffffa00afeab ffff88001fa9a300
  [360136.752666]  ffff8800d4e4ae18 ffff88010cb8bbbc ffff88010cb8bb58 ffffffffa00b2753
  [360136.752666]  ffff8800d4e4ae20 ffff88008df75080 ffff88010cb8bcb8 00000000ffffff97
  [360136.752666] Call Trace:
  [360136.752666]  [<ffffffffa00afeab>] fscache_put_operation+0x5b/0x220 [fscache]
  [360136.752666]  [<ffffffffa00b2753>] __fscache_read_or_alloc_pages+0x1b3/0x350 [fscache]
  [360136.752666]  [<ffffffffa015d5c1>] __nfs_readpages_from_fscache+0x71/0x1b0 [nfs]
  [360136.752666]  [<ffffffffa01547b8>] nfs_readpages+0xa8/0x190 [nfs]
  [360136.752666]  [<ffffffff81197c53>] ? alloc_pages_current+0xa3/0x160
  [360136.752666]  [<ffffffff8114f757>] ? __page_cache_alloc+0x97/0xc0
  [360136.752666]  [<ffffffff8115ba39>] __do_page_cache_readahead+0x1b9/0x260
  [360136.752666]  [<ffffffff8115bf12>] ondemand_readahead+0x152/0x2a0
  [360136.752666]  [<ffffffff8115c091>] page_cache_sync_readahead+0x31/0x50
  [360136.752666]  [<ffffffff81151b65>] generic_file_aio_read+0x4c5/0x700
  [360136.752666]  [<ffffffffa0149949>] nfs_file_read+0x69/0xf0 [nfs]
  [360136.752666]  [<ffffffff811bd8ba>] do_sync_read+0x5a/0x90
  [360136.752666]  [<ffffffff811bdf55>] vfs_read+0x95/0x160
  [360136.752666]  [<ffffffff811bea69>] SyS_read+0x49/0xa0
  [360136.752666]  [<ffffffff8173391d>] system_call_fastpath+0x1a/0x1f
  [360136.752666] Code: c0 e8 92 ab 66 e1 48 c7 c7 ae 5c 0b a0 31 c0 e8 84 ab 66 e1 48 63 b3 90 00 00 00 31 d2 48 c7 c7 e3 5c 0b a0 31 c0 e8 6d ab 66 e1 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 
  [360136.752666] RIP  [<ffffffffa00b1c14>] fscache_release_retrieval_op+0x74/0x80 [fscache]
  [360136.752666]  RSP <ffff88010cb8bad8>
  [360136.935505] ---[ end trace 5e0dd6a39f65225d ]---
  [361660.951453] 
  [361660.952687] FS-Cache: Assertion failed
  [361660.954870] 1 == 0 is false
  [361660.956679] ------------[ cut here ]------------
  [361660.959155] kernel BUG at /build/buildd/linux-3.13.0/fs/fscache/page.c:244!
  [361660.960653] invalid opcode: 0000 [#2] SMP 
  [361660.960653] Modules linked in: veth xt_nat xt_tcpudp xt_addrtype xt_conntrack ipt_MASQUERADE iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 iptable_filter ip_tables x_tables nf_nat nf_conntrack bridge stp llc dm_thin_pool dm_persistent_data dm_bufio dm_bio_prison libcrc32c cachefiles nfsv3 nfsd auth_rpcgss nfs_acl nfs lockd sunrpc fscache dm_crypt syscopyarea sysfillrect sysimgblt fb_sys_fops serio_raw isofs crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd psmouse floppy
  [361660.960653] CPU: 0 PID: 7839 Comm: php5-fpm Tainted: G      D       3.13.0-53-generic #89-Ubuntu
  [361660.960653] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/06/2015
  [361660.960653] task: ffff8800094c0000 ti: ffff880007daa000 task.ti: ffff880007daa000
  [361660.960653] RIP: 0010:[<ffffffffa00b1c14>]  [<ffffffffa00b1c14>] fscache_release_retrieval_op+0x74/0x80 [fscache]
  [361660.960653] RSP: 0018:ffff880007dabad8  EFLAGS: 00010286
  [361660.960653] RAX: 000000000000000f RBX: ffff88000903be40 RCX: 0000000000000006
  [361660.960653] RDX: 0000000000000007 RSI: 0000000053625360 RDI: 0000000000000246
  [361660.960653] RBP: ffff880007dabae0 R08: 0000000000000096 R09: 0000000000000265
  [361660.960653] R10: ffffffff8185ade0 R11: ffff880007dab806 R12: ffff8800117e3aa8
  [361660.960653] R13: ffff880007dabbbc R14: 00000000ffffff97 R15: ffff8800e7b707e8
  [361660.960653] FS:  00007f4233932740(0000) GS:ffff8801efc00000(0000) knlGS:0000000000000000
  [361660.960653] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  [361660.960653] CR2: 00007faa5c88e208 CR3: 000000001fbe0000 CR4: 00000000001406f0
  [361660.960653] Stack:
  [361660.960653]  ffff88000903be40 ffff880007dabb08 ffffffffa00afeab ffff88000903be40
  [361660.960653]  ffff8800117e3aa8 ffff880007dabbbc ffff880007dabb58 ffffffffa00b2753
  [361660.960653]  ffff8800117e3ab0 ffff8800e7b70780 ffff880007dabcb8 00000000ffffff97
  [361660.960653] Call Trace:
  [361660.960653]  [<ffffffffa00afeab>] fscache_put_operation+0x5b/0x220 [fscache]
  [361660.960653]  [<ffffffffa00b2753>] __fscache_read_or_alloc_pages+0x1b3/0x350 [fscache]
  [361660.960653]  [<ffffffffa015d5c1>] __nfs_readpages_from_fscache+0x71/0x1b0 [nfs]
  [361660.960653]  [<ffffffffa01547b8>] nfs_readpages+0xa8/0x190 [nfs]
  [361660.960653]  [<ffffffff81197c53>] ? alloc_pages_current+0xa3/0x160
  [361660.960653]  [<ffffffff8114f757>] ? __page_cache_alloc+0x97/0xc0
  [361660.960653]  [<ffffffff8115ba39>] __do_page_cache_readahead+0x1b9/0x260
  [361660.960653]  [<ffffffff8115bf12>] ondemand_readahead+0x152/0x2a0
  [361660.960653]  [<ffffffff8115c091>] page_cache_sync_readahead+0x31/0x50
  [361660.960653]  [<ffffffff81151b65>] generic_file_aio_read+0x4c5/0x700
  [361660.960653]  [<ffffffffa0149949>] nfs_file_read+0x69/0xf0 [nfs]
  [361660.960653]  [<ffffffff811bd8ba>] do_sync_read+0x5a/0x90
  [361660.960653]  [<ffffffff811bdf55>] vfs_read+0x95/0x160
  [361660.960653]  [<ffffffff811bea69>] SyS_read+0x49/0xa0
  [361660.960653]  [<ffffffff8173391d>] system_call_fastpath+0x1a/0x1f
  [361660.960653] Code: c0 e8 92 ab 66 e1 48 c7 c7 ae 5c 0b a0 31 c0 e8 84 ab 66 e1 48 63 b3 90 00 00 00 31 d2 48 c7 c7 e3 5c 0b a0 31 c0 e8 6d ab 66 e1 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 
  [361660.960653] RIP  [<ffffffffa00b1c14>] fscache_release_retrieval_op+0x74/0x80 [fscache]
  [361660.960653]  RSP <ffff880007dabad8>
  [361661.134212] ---[ end trace 5e0dd6a39f65225e ]---
  [363766.284093] 
  [363766.285960] FS-Cache: Assertion failed
  [363766.289822] 1 == 0 is false
  [363766.292641] ------------[ cut here ]------------
  [363766.295666] kernel BUG at /build/buildd/linux-3.13.0/fs/fscache/page.c:244!
  [363766.296609] invalid opcode: 0000 [#3] SMP 
  [363766.296609] Modules linked in: veth xt_nat xt_tcpudp xt_addrtype xt_conntrack ipt_MASQUERADE iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 iptable_filter ip_tables x_tables nf_nat nf_conntrack bridge stp llc dm_thin_pool dm_persistent_data dm_bufio dm_bio_prison libcrc32c cachefiles nfsv3 nfsd auth_rpcgss nfs_acl nfs lockd sunrpc fscache dm_crypt syscopyarea sysfillrect sysimgblt fb_sys_fops serio_raw isofs crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd psmouse floppy
  [363766.296609] CPU: 0 PID: 8794 Comm: php5-fpm Tainted: G      D       3.13.0-53-generic #89-Ubuntu
  [363766.296609] Hardware name: Xen HVM domU, BIOS 4.2.amazon 05/06/2015
  [363766.296609] task: ffff88003704b000 ti: ffff8801025ce000 task.ti: ffff8801025ce000
  [363766.296609] RIP: 0010:[<ffffffffa00b1c14>]  [<ffffffffa00b1c14>] fscache_release_retrieval_op+0x74/0x80 [fscache]
  [363766.296609] RSP: 0018:ffff8801025cfad8  EFLAGS: 00010286
  [363766.296609] RAX: 000000000000000f RBX: ffff880105a92780 RCX: 0000000000000000
  [363766.296609] RDX: ffff8801efc0f020 RSI: ffff8801efc0d408 RDI: 0000000000000246
  [363766.296609] RBP: ffff8801025cfae0 R08: 0000000000000096 R09: 0000000000000291
  [363766.296609] R10: ffffffff8185ade0 R11: ffff8801025cf806 R12: ffff8800117e3aa8
  [363766.296609] R13: ffff8801025cfbbc R14: 00000000ffffff97 R15: ffff8800e7b707e8
  [363766.296609] FS:  00007f4233932740(0000) GS:ffff8801efc00000(0000) knlGS:0000000000000000
  [363766.296609] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  [363766.296609] CR2: 00000000030ba160 CR3: 0000000100915000 CR4: 00000000001406f0
  [363766.296609] Stack:
  [363766.296609]  ffff880105a92780 ffff8801025cfb08 ffffffffa00afeab ffff880105a92780
  [363766.296609]  ffff8800117e3aa8 ffff8801025cfbbc ffff8801025cfb58 ffffffffa00b2753
  [363766.296609]  ffff8800117e3ab0 ffff8800e7b70780 ffff8801025cfcb8 00000000ffffff97
  [363766.296609] Call Trace:
  [363766.296609]  [<ffffffffa00afeab>] fscache_put_operation+0x5b/0x220 [fscache]
  [363766.296609]  [<ffffffffa00b2753>] __fscache_read_or_alloc_pages+0x1b3/0x350 [fscache]
  [363766.296609]  [<ffffffffa015d5c1>] __nfs_readpages_from_fscache+0x71/0x1b0 [nfs]
  [363766.296609]  [<ffffffffa01547b8>] nfs_readpages+0xa8/0x190 [nfs]
  [363766.296609]  [<ffffffff81197c53>] ? alloc_pages_current+0xa3/0x160
  [363766.296609]  [<ffffffff8114f757>] ? __page_cache_alloc+0x97/0xc0
  [363766.296609]  [<ffffffff8115ba39>] __do_page_cache_readahead+0x1b9/0x260
  [363766.296609]  [<ffffffff8115bf12>] ondemand_readahead+0x152/0x2a0
  [363766.296609]  [<ffffffff8115c091>] page_cache_sync_readahead+0x31/0x50
  [363766.296609]  [<ffffffff81151b65>] generic_file_aio_read+0x4c5/0x700
  [363766.296609]  [<ffffffffa0149949>] nfs_file_read+0x69/0xf0 [nfs]
  [363766.296609]  [<ffffffff811bd8ba>] do_sync_read+0x5a/0x90
  [363766.296609]  [<ffffffff811bdf55>] vfs_read+0x95/0x160
  [363766.296609]  [<ffffffff811bea69>] SyS_read+0x49/0xa0
  [363766.296609]  [<ffffffff8173391d>] system_call_fastpath+0x1a/0x1f
  [363766.296609] Code: c0 e8 92 ab 66 e1 48 c7 c7 ae 5c 0b a0 31 c0 e8 84 ab 66 e1 48 63 b3 90 00 00 00 31 d2 48 c7 c7 e3 5c 0b a0 31 c0 e8 6d ab 66 e1 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 
  [363766.296609] RIP  [<ffffffffa00b1c14>] fscache_release_retrieval_op+0x74/0x80 [fscache]
  [363766.296609]  RSP <ffff8801025cfad8>
  [363766.499901] ---[ end trace 5e0dd6a39f65225f ]---

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