v5.1-rc5 s390x WARNING

Li Wang
2019-04-17T08:36:09Z

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Hi there,

I catched this warning on v5.1-rc5(s390x). It was trggiered in fork &
malloc & memset stress test, but the reproduced rate is very low. I'm
working on find a stable reproducer for it.

Anyone can have a look first?

[ 1422.124060] WARNING: CPU: 0 PID: 9783 at mm/page_alloc.c:3777
__alloc_pages_irect_compact+0x182/0x190
[ 1422.124065] Modules linked in: rpcsec_gss_krb5 auth_rpcgss nfsv4
dns_resolver
nfs lockd grace fscache sunrpc pkey ghash_s390 prng xts aes_s390
des_s390 des_g
eneric sha512_s390 zcrypt_cex4 zcrypt vmur binfmt_misc ip_tables xfs
libcrc32c d
asd_fba_mod qeth_l2 dasd_eckd_mod dasd_mod qeth qdio lcs ctcm ccwgroup
fsm dm_mi
rror dm_region_hash dm_log dm_mod
[ 1422.124086] CPU: 0 PID: 9783 Comm: copy.sh Kdump: loaded Not
tainted 5.1.0-rc 5 #1
[ 1422.124089] Hardware name: IBM 2827 H43 400 (z/VM 6.4.0)
[ 1422.124092] Krnl PSW : 0704e00180000000 00000000002779ba
(__alloc_pages_direct_compact+0x182/0x190)
[ 1422.124096] R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3
CC:2 PM:0 RI: 0 EA:3
[ 1422.124100] Krnl GPRS: 0000000000000000 000003e00226fc24
000003d081bdf200 000 0000000000001
[ 1422.124103] 000000000027789a 0000000000000000
0000000000000001 000 000000006ee03
[ 1422.124107] 000003e00226fc28 0000000000000cc0
0000000000000240 000 0000000000002
[ 1422.124156] 0000000000400000 0000000000753cb0
000000000027789a 000 003e00226fa28
[ 1422.124163] Krnl Code: 00000000002779ac: e320f0a80002 ltg
%r2,168( %r15)
[ 1422.124163] 00000000002779b2: a784fff4 brc
8,27799a
[ 1422.124163] #00000000002779b6: a7f40001 brc
15,2779b 8
[ 1422.124163] >00000000002779ba: a7290000 lghi
%r2,0
[ 1422.124163] 00000000002779be: a7f4fff0 brc
15,27799 e
[ 1422.124163] 00000000002779c2: 0707 bcr
0,%r7
[ 1422.124163] 00000000002779c4: 0707 bcr
0,%r7
[ 1422.124163] 00000000002779c6: 0707 bcr
0,%r7
[ 1422.124194] Call Trace:
[ 1422.124196] ([<000000000027789a>]
__alloc_pages_direct_compact+0x62/0x190)
[ 1422.124198] [<0000000000278618>]
__alloc_pages_nodemask+0x728/0x1148
[ 1422.124201] [<0000000000126bb2>] crst_table_alloc+0x32/0x68
[ 1422.124203] [<0000000000135888>] mm_init+0x118/0x308
[ 1422.124204] [<0000000000137e60>]
copy_process.part.49+0x1820/0x1d90
[ 1422.124205] [<000000000013865c>] _do_fork+0x114/0x3b8
[ 1422.124206] [<0000000000138aa4>] __s390x_sys_clone+0x44/0x58
[ 1422.124210] [<0000000000739a90>] system_call+0x288/0x2a8
[ 1422.124210] Last Breaking-Event-Address:
[ 1422.124212] [<00000000002779b6>]
__alloc_pages_direct_compact+0x17e/0x190
[ 1422.124213] ---[ end trace 36649eaa36968eaa ]---

--
Regards,
Li Wang

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