https://jira.whamcloud.com This file is an XML representation of an issue en-us 9.4.14 940014 05-12-2023 https://jira.whamcloud.com/browse/LU-5890 Lustre <p>when I run IOR on my VM, I always see tons of information like this:</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>Lustre: 20808:0:(osd_handler.c:1003:osd_trans_start()) lustre-OST0001: too many transaction credits (1036 &gt; 1024) Lustre: 20808:0:(osd_handler.c:1008:osd_trans_start()) create: 0/0, destroy: 0/0 Lustre: 20808:0:(osd_handler.c:1013:osd_trans_start()) attr_set: 1/1, xattr_set: 1/1 Lustre: 20808:0:(osd_handler.c:1020:osd_trans_start()) write: 2/12, punch: 0/0, quota 4/4 Lustre: 20808:0:(osd_handler.c:1025:osd_trans_start()) insert: 0/0, delete: 0/0 Lustre: 20808:0:(osd_handler.c:1030:osd_trans_start()) ref_add: 0/0, ref_del: 0/0 Pid: 20808, comm: ll_ost_io00_002 Call Trace: [&lt;ffffffffa1059895&gt;] libcfs_debug_dumpstack+0x55/0x80 [libcfs] [&lt;ffffffffa07acb9f&gt;] osd_trans_start+0x63f/0x660 [osd_ldiskfs] [&lt;ffffffffa0ac4f5c&gt;] ofd_trans_start+0x7c/0x100 [ofd] [&lt;ffffffffa0acc823&gt;] ofd_commitrw_write+0x543/0x1060 [ofd] [&lt;ffffffffa0acd903&gt;] ofd_commitrw+0x5c3/0xae0 [ofd] [&lt;ffffffffa115c361&gt;] ? lprocfs_counter_add+0x151/0x1c0 [obdclass] [&lt;ffffffffa13fa00d&gt;] obd_commitrw.clone.0+0x11d/0x390 [ptlrpc] [&lt;ffffffffa140131c&gt;] tgt_brw_write+0xc7c/0x1530 [ptlrpc] [&lt;ffffffffa135b800&gt;] ? target_bulk_timeout+0x0/0xc0 [ptlrpc] [&lt;ffffffffa14002ae&gt;] tgt_request_handle+0x71e/0xb10 [ptlrpc] [&lt;ffffffffa13afa94&gt;] ptlrpc_main+0xe64/0x1990 [ptlrpc] [&lt;ffffffffa13aec30&gt;] ? ptlrpc_main+0x0/0x1990 [ptlrpc] [&lt;ffffffff8109aef6&gt;] kthread+0x96/0xa0 [&lt;ffffffff8100c20a&gt;] child_rip+0xa/0x20 [&lt;ffffffff8109ae60&gt;] ? kthread+0x0/0xa0 [&lt;ffffffff8100c200&gt;] ? child_rip+0x0/0x20 Lustre: 21638:0:(osd_handler.c:1003:osd_trans_start()) lustre-OST0001: too many transaction credits (1044 &gt; 1024) Lustre: 21638:0:(osd_handler.c:1003:osd_trans_start()) Skipped 2 previous similar messages Lustre: 21638:0:(osd_handler.c:1008:osd_trans_start()) create: 0/0, destroy: 0/0 Lustre: 21638:0:(osd_handler.c:1008:osd_trans_start()) Skipped 2 previous similar messages Lustre: 21638:0:(osd_handler.c:1013:osd_trans_start()) attr_set: 1/1, xattr_set: 1/1 Lustre: 21638:0:(osd_handler.c:1013:osd_trans_start()) Skipped 2 previous similar messages Lustre: 21638:0:(osd_handler.c:1020:osd_trans_start()) write: 2/12, punch: 0/0, quota 4/4 Lustre: 21638:0:(osd_handler.c:1020:osd_trans_start()) Skipped 2 previous similar messages Lustre: 21638:0:(osd_handler.c:1025:osd_trans_start()) insert: 0/0, delete: 0/0 Lustre: 21638:0:(osd_handler.c:1025:osd_trans_start()) Skipped 2 previous similar messages Lustre: 21638:0:(osd_handler.c:1030:osd_trans_start()) ref_add: 0/0, ref_del: 0/0 Lustre: 21638:0:(osd_handler.c:1030:osd_trans_start()) Skipped 2 previous similar messages Lustre: 21638:0:(osd_handler.c:1003:osd_trans_start()) lustre-OST0001: too many transaction credits (1552 &gt; 1024) </pre> </div></div> <p>This is very easy to reproduce:</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>IOR -b 64m -t 1024 -z -X 3712 -o /mnt/lustre/liang/IOR.file </pre> </div></div> LU-5890

lustre-OST0001: too many transaction credits (1044 > 1024)

Bug Minor Resolved Duplicate WC Triage Liang Zhen Mon, 10 Nov 2014 07:44:29 +0000 Tue, 14 Dec 2021 22:45:41 +0000 Tue, 14 Dec 2021 22:45:41 +0000 Lustre 2.7.0 0 8 <p>This is not a significant problem. This is debugging enabled while testing so that we can detect if there are errors in the transaction credit accounting but is not enabled in production. </p> <p>There could be something wrong, I don't see why the credits for all operations don't add up right. (looks much less than the total credits)</p> <p>Niu, those are "direct" writes in osd_declare_write_commit() - those are added directly to osd_thandle. I think I fixed this in <a href="http://review.whamcloud.com/#/c/12169/" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/#/c/12169/</a></p> Related LU-14918 Development Rank 1|hzx0jr: Rank (Obsolete) 16464 Severity