kernel-packages team mailing list archive

[Dimitri John Ledkov <launchpad@xxxxxxxxxxxx>]

As far as I understand this is a runtime bug, but is not install time
critical. If we respin a kernel for any reason between now and final
release we will try to include a fix for this bug if a backported patch
for 4.4 stable exists. Othwerwise we will work on landing this as part
of the SRU (Stable Release Update) cadence for the kernel. Therefore
opening tasks for both xenial and y-series, in anticipation for a fix.

** Also affects: linux (Ubuntu Y-series)
   Importance: Undecided
       Status: New

** Also affects: linux (Ubuntu Xenial)
   Importance: Undecided
     Assignee: Andy Whitcroft (apw)
       Status: Incomplete

** Changed in: linux (Ubuntu Y-series)
       Status: New => Incomplete

** Changed in: linux (Ubuntu Xenial)
   Importance: Undecided => High

** Changed in: linux (Ubuntu Y-series)
   Importance: Undecided => High

** Changed in: ubuntu-z-systems
   Importance: Critical => High

** Changed in: linux (Ubuntu Y-series)
     Assignee: (unassigned) => Andy Whitcroft (apw)

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https://bugs.launchpad.net/bugs/1559194

Title:
  Bad page state in process genwqe_gunzip pfn:3c275 in the genwqe device
  driver

Status in Ubuntu on IBM z Systems:
  Incomplete
Status in linux package in Ubuntu:
  Incomplete
Status in linux source package in Xenial:
  Incomplete
Status in linux source package in y-series:
  Incomplete

Bug description:
  == Comment: #0 - Dmitry Gorbachev <dmitry.gorbachev@xxxxxxxxxx> - 2016-03-17 08:52:41 ==
  An error occurs when running zEDC compression/decompression and hotplugging PCI devices.
  There was 1G of memory, 2 pci functions and 50 threads of gunzipping enabled.

  Mar 14 23:59:01 s8330018 kernel: [ 4972.486883] BUG: Bad page state in process genwqe_gunzip  pfn:3c275
  Mar 14 23:59:01 s8330018 kernel: [ 4972.486888] page:000003d100f09d40 count:-1 mapcount:0 mapping:          (null) index:0x0
  Mar 14 23:59:01 s8330018 kernel: [ 4972.486891] flags: 0x0()
  Mar 14 23:59:01 s8330018 kernel: [ 4972.486895] page dumped because: nonzero _count
  Mar 14 23:59:01 s8330018 kernel: [ 4972.486897] Modules linked in: xt_CHECKSUM(E) iptable_mangle(E) ipt_MASQUERADE(E) nf_nat_masquerade_ipv4(E) iptable_nat(E) nf_conntrack_ipv4(E) nf_defrag_ipv4(E) nf_nat_ipv4(E) nf_nat(E) nf_conntrack(E) xt_tcpudp(E) bridge(E) stp(E) llc(E) iptable_filter(E) ip_tables(E) x_tables(E) genwqe_card(E) crc_itu_t(E) qeth_l2(E) qeth(E) vmur(E) ccwgroup(E) dm_multipath(E) ib_iser(E) rdma_cm(E) iw_cm(E) ib_cm(E) ib_sa(E) ib_mad(E) ib_core(E) ib_addr(E) iscsi_tcp(E) libiscsi_tcp(E) libiscsi(E) scsi_transport_iscsi(E) btrfs(E) zlib_deflate(E) raid10(E) raid456(E) async_memcpy(E) async_raid6_recov(E) async_pq(E) async_xor(E) async_tx(E) xor(E) raid6_pq(E) libcrc32c(E) raid1(E) raid0(E) linear(E) ghash_s390(E) prng(E) aes_s390(E) des_s390(E) des_generic(E) sha512_s390(E) sha256_s390(E) sha1_s390(E) sha_common(E) zfcp(E) qdio(E) scsi_transport_fc(E) dasd_eckd_mod(E) dasd_mod(E)
  Mar 14 23:59:01 s8330018 kernel: [ 4972.486916] CPU: 0 PID: 37867 Comm: genwqe_gunzip Tainted: G        W   E   4.4.0-8-generic #23-Ubuntu
  Mar 14 23:59:01 s8330018 kernel: [ 4972.486916]        00000000209176f8 0000000020917788 0000000000000002 0000000000000000
  Mar 14 23:59:01 s8330018 kernel: [ 4972.486916]        0000000020917828 00000000209177a0 00000000209177a0 0000000000114182
  Mar 14 23:59:01 s8330018 kernel: [ 4972.486916]        0000000000000011 000000000092345a 000003d10000000a 000000000000000a
  Mar 14 23:59:01 s8330018 kernel: [ 4972.486916]        00000000209177e8 0000000020917788 0000000000000000 0000000020914000
  Mar 14 23:59:01 s8330018 kernel: [ 4972.486916]        0000000000000000 0000000000114182 0000000020917788 00000000209177e8
  Mar 14 23:59:01 s8330018 kernel: [ 4972.486922] Call Trace:
  Mar 14 23:59:01 s8330018 kernel: [ 4972.486927] ([<000000000011406e>] show_trace+0xf6/0x148)
  Mar 14 23:59:01 s8330018 kernel: [ 4972.486929]  [<0000000000114136>] show_stack+0x76/0xe8
  Mar 14 23:59:01 s8330018 kernel: [ 4972.486934]  [<0000000000518c26>] dump_stack+0x6e/0x90
  Mar 14 23:59:01 s8330018 kernel: [ 4972.486937]  [<000000000027c376>] bad_page+0xe6/0x148
  Mar 14 23:59:01 s8330018 kernel: [ 4972.486938]  [<0000000000280516>] get_page_from_freelist+0x49e/0xba8
  Mar 14 23:59:01 s8330018 kernel: [ 4972.486940]  [<0000000000280ede>] __alloc_pages_nodemask+0x166/0xb00
  Mar 14 23:59:01 s8330018 kernel: [ 4972.486941]  [<000000000015635a>] s390_dma_alloc+0x82/0x1a0
  Mar 14 23:59:01 s8330018 kernel: [ 4972.486944]  [<000003ff805ea142>] __genwqe_alloc_consistent+0x7a/0x90 [genwqe_card]
  Mar 14 23:59:01 s8330018 kernel: [ 4972.486947]  [<000003ff805ea344>] genwqe_alloc_sync_sgl+0x17c/0x2e0 [genwqe_card]
  Mar 14 23:59:01 s8330018 kernel: [ 4972.486950]  [<000003ff805e52da>] do_execute_ddcb+0x1da/0x348 [genwqe_card]
  Mar 14 23:59:01 s8330018 kernel: [ 4972.486952]  [<000003ff805e5964>] genwqe_ioctl+0x51c/0xc20 [genwqe_card]
  Mar 14 23:59:01 s8330018 kernel: [ 4972.486953]  [<00000000003145ee>] do_vfs_ioctl+0x3b6/0x518
  Mar 14 23:59:01 s8330018 kernel: [ 4972.486955]  [<00000000003147f4>] SyS_ioctl+0xa4/0xb8
  Mar 14 23:59:01 s8330018 kernel: [ 4972.486956]  [<00000000007ad1be>] system_call+0xd6/0x264
  Mar 14 23:59:01 s8330018 kernel: [ 4972.486957]  [<000003ffa9df2492>] 0x3ffa9df2492

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