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.gorbac...@ru.ibm.com> - 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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