[LU-4494] sanity-scrub test 4: lustre-MDT0001: too many transaction credits (309 > 256)

• Type: Bug
• Resolution: Duplicate
• Priority: Minor
• Affects Version/s: Lustre 2.6.0
• Labels: dne
• Environment: Lustre branch: master; MDSCOUNT=4
• Severity: 3
• Assignee: WC Triage
• Reporter: Jian Yu

Description

While testing patch http://review.whamcloud.com/8523 on master branch with MDSCOUNT=4, the following issues occurred on one of the MDTs during create:

Lustre: DEBUG MARKER: mkdir -p /mnt/mds4; mount -t lustre -o user_xattr,acl                                /dev/lvm-Role_MDS/P4 /mnt/mds4^M
LDISKFS-fs (dm-3): mounted filesystem with ordered data mode. quota=on. Opts: ^M
LDISKFS-fs (dm-3): mounted filesystem with ordered data mode. quota=on. Opts: ^M
Lustre: DEBUG MARKER: PATH=/usr/lib64/lustre/tests:/usr/lib/lustre/tests:/usr/lib64/lustre/tests:/opt/iozone/bin:/opt/iozone/bin:/usr/lib64/lustre/tests/mpi:/usr/lib64/lustre/tests/racer:/usr/lib64/lustre/../lustre-iokit/sgpdd-survey:/usr/lib64/lustre/tests:/usr/lib64/lustre/u^M
Lustre: DEBUG MARKER: e2label /dev/lvm-Role_MDS/P4 2>/dev/null^M
Lustre: DEBUG MARKER: /usr/sbin/lctl mark Using TIMEOUT=20^M
Lustre: DEBUG MARKER: Using TIMEOUT=20^M
Lustre: cli-ctl-lustre-MDT0001: Allocated super-sequence [0x0000000440000400-0x0000000480000400):1:mdt]^M
Lustre: 32030:0:(osd_handler.c:872:osd_trans_start()) lustre-MDT0001: too many transaction credits (309 > 256)
Lustre: 32030:0:(osd_handler.c:879:osd_trans_start())   create: 2/50, delete: 0/0, destroy: 0/0
Lustre: 32030:0:(osd_handler.c:884:osd_trans_start())   attr_set: 2/2, xattr_set: 4/43
Lustre: 32030:0:(osd_handler.c:891:osd_trans_start())   write: 11/154, punch: 2/8, quota 2/2
Lustre: 32030:0:(osd_handler.c:896:osd_trans_start())   insert: 3/50, delete: 0/0
Lustre: 32030:0:(osd_handler.c:901:osd_trans_start())   ref_add: 0/0, ref_del: 0/0
Pid: 32030, comm: mdt00_002

Call Trace:
 [<ffffffffa0903895>] libcfs_debug_dumpstack+0x55/0x80 [libcfs]
 [<ffffffffa0a95a43>] osd_trans_start+0x653/0x670 [osd_ldiskfs]
 [<ffffffffa0dfc579>] lod_trans_start+0x1b9/0x250 [lod]
 [<ffffffffa0e72317>] mdd_trans_start+0x17/0x20 [mdd]
 [<ffffffffa0e65dd9>] mdd_create+0x929/0x17a0 [mdd]
 [<ffffffffa0d52fa8>] mdo_create+0x18/0x50 [mdt]
 [<ffffffffa0d5d037>] mdt_reint_open+0x12a7/0x2120 [mdt]
 [<ffffffffa0d47a91>] mdt_reint_rec+0x41/0xe0 [mdt]
 [<ffffffffa0d2ddb3>] mdt_reint_internal+0x4c3/0x780 [mdt]
 [<ffffffffa0d2e265>] mdt_intent_reint+0x1f5/0x520 [mdt]
 [<ffffffffa0d2c989>] mdt_intent_policy+0x499/0xca0 [mdt]
 [<ffffffffa0527509>] ldlm_lock_enqueue+0x359/0x920 [ptlrpc]
 [<ffffffffa0550edf>] ldlm_handle_enqueue0+0x4ef/0x10b0 [ptlrpc]
 [<ffffffffa05cb492>] tgt_enqueue+0x62/0x1d0 [ptlrpc]
 [<ffffffffa05cdfea>] tgt_handle_request0+0x2ea/0x1490 [ptlrpc]
 [<ffffffffa05cf5ca>] tgt_request_handle+0x43a/0x980 [ptlrpc]
 [<ffffffffa0582725>] ptlrpc_main+0xd25/0x1970 [ptlrpc]

And then the nodes were re-provisioned by autotest.

Maloo report: https://maloo.whamcloud.com/test_sets/12c1c02a-7e6f-11e3-925a-52540035b04c

Issue Links

• is related to: LU-4611 too many transaction credits (32279 > 25600)