[LU-7754] DNE3: osd-zfs gets into a livelock if transaction is too big

• Type: Bug
• Resolution: Unresolved
• Priority: Minor
• Affects Version/s: Lustre 2.8.0
• Labels: dne3 zfs
• Severity: 3
• Assignee: Alex Zhuravlev
• Reporter: Alex Zhuravlev

Description

ONLY=300k bash sanity.sh:

[ 89.828294] LNet: Service thread pid 4249 was inactive for 40.00s. The thread might be hung, or it might only be slow and will resume later. Dumping the stack trace for debugging purposes:
[ 89.831356] Pid: 4249, comm: mdt01_001
[ 89.831895]
[ 89.831895] Call Trace:
[ 89.832451] [<ffffffff810ac6de>] ? getrawmonotonic+0x2e/0xc0
[ 89.833222] [<ffffffff810828c5>] __cond_resched+0x25/0x40
[ 89.834035] [<ffffffff814e521a>] _cond_resched+0x2a/0x40
[ 89.834810] [<ffffffff814e5f11>] mutex_lock+0x11/0x40
[ 89.835565] [<ffffffffa07741b4>] dmu_tx_assign+0x284/0x500 [zfs]
[ 89.836410] [<ffffffffa0a1ae32>] osd_trans_start+0xb2/0x410 [osd_zfs]
[ 89.837282] [<ffffffffa032de15>] top_trans_start+0x255/0x9c0 [ptlrpc]
[ 89.838090] [<ffffffffa0bb88f9>] lod_trans_start+0x59/0x60 [lod]
[ 89.838854] [<ffffffffa0ae3cdf>] mdd_trans_start+0xf/0x20 [mdd]
[ 89.839594] [<ffffffffa0acf1a0>] mdd_create+0x1170/0x1c70 [mdd]

Issue Links

• is related to: LU-9096 sanity test_253: File creation failed after rm
• is related to: LU-8267 sanity test_129: (osd_internal.h:1137:osd_trans_exec_check()) LBUG