[LU-7382] (vvp_io.c:573:vvp_io_update_iov()) ASSERTION( vio->vui_tot_nrsegs >= vio->vui_iter->nr_segs ) failed

• Type: Bug
• Resolution: Unresolved
• Priority: Major
• Fix Version/s: Lustre 2.8.0
• Affects Version/s: Lustre 2.7.0, Lustre 2.8.0, Lustre 2.5.4
• Severity: 3
• Assignee: Zhenyu Xu
• Reporter: Zhenyu Xu

Description

kernel:LustreError: 29035:0:(vvp_io.c:573:vvp_io_update_iov()) ASSERTION( vio->vui_tot_nrsegs >= vio->vui_iter->nr_segs ) failed: tot_nrsegs: 1, nrsegs: 2

Message from syslogd@test1 at Nov 4 13:01:37 ...
kernel:LustreError: 29035:0:(vvp_io.c:573:vvp_io_update_iov()) LBUG

Issue Links

• is duplicated by: LU-9106 ASSERTION( vio->vui_tot_nrsegs >= vio->vui_iter->nr_segs )
• is related to: LU-6260 more support for 3.16 linux kernel
• is related to: LU-7067 vvp_io.c:1076:vvp_io_write_start()) ASSERTION( vio->vui_iocb->ki_pos == pos ) failed
• is related to: LU-4257 parallel dds are slower than serial dds

Comments

[Joseph Gmitter (Inactive)]

Landed for 2.8.0

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch http://review.whamcloud.com/17632/
Subject: LU-7382 llite: Fix iovec references accounting in ll_file_aio_read/write
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 57f055f8d0df80e140724b00d1729f454222a83a

[Patrick Farrell (Inactive)]

I've uploaded a new set of four dumps with Andriy's patch to here:
ftp.whamcloud.com:/uploads/LU-7382/151223_dumps.tar.gz

All four nodes which failed had debug enabled. I've included the extracted (and sorted) logs for one of them:
c0-0c1s0n1-1512222203_log.sort

[Gerrit Updater]

Andriy Skulysh ([e-mail]) uploaded a new patch: http://review.whamcloud.com/17632
Subject: LU-7382 llite: vvp_io_update_iov() ASSERTION failure
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 8431fec8ba5434b76aa994d93d5fa44b850be689

[Zhenyu Xu]

Thank you Ann for the crash dump.

[Ann Koehler (Inactive)]

Cray is seeing this bug regularly during system testing using Lustre 2.7 on a relatively small machine (1 MDT, 8 OSTs, 16 clients). I've uploaded a couple of dumps in case they may be useful in resolving the bug. Location:
ftp.whamcloud.com:/uploads/LU-7382/LU-7382_dump.tgz

[Gerrit Updater]

Bobi Jam ([e-mail]) uploaded a new patch: http://review.whamcloud.com/17039
Subject: LU-7382 llite: vvp_io_update_iov() ASSERTION failure
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: 564cc551579b105edea5e84a184fb71c015bf678