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-11527 Lustre <p>The issue was reported by John Hammond, in test 270a the writing to the DOM file may fail with -ENOSPC due to grants most probably. If test 270a is being ran in a loop then the first  several times it passes but all the other times seem to fail.</p> LU-11527

sanity test_270a failed with O_DIRECT on ARM

Bug Major Resolved Fixed Hongchao Zhang Mikhail Pershin DoM2 arm Tue, 16 Oct 2018 10:30:39 +0000 Tue, 13 Nov 2018 11:16:03 +0000 Tue, 13 Nov 2018 11:16:03 +0000 Lustre 2.12.0 0 6 <p>this issue does not only exist at DoM, it is the same behavior on OST.<br/> the reason of this issue is the direct write (with "oflag direct") ignores the grant at client side, and the grant of the client<br/> will be increased alongside the I/O, and if the remain disk space (subtracted the total grant to clients) at MDT or OST<br/> is not enough (could be more easy to reach for local test on VMs), it will cause -ENOSPC</p> <p>there is no error (ran 200 times in a loop) after deleting the "oflag direct" in test 270a of sanity.th<br/> but it will trigger -ENSPC less than 5 times with the "oflag direct"<br/> this error is also reproduced by writing the normal file with "dd" + "oflag direct" </p> <p>So in context of this ticket I propose to modify test and remove 'oflag direct' which is not so needed. As for general issue with DIRECT IO vs grants I'd first ask around is there any ticket about that.</p> <p>Andreas Dilger (adilger@whamcloud.com) uploaded a new patch: <a href="https://review.whamcloud.com/33633" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/33633</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-11527" title="sanity test_270a failed with O_DIRECT on ARM" class="issue-link" data-issue-key="LU-11527"><del>LU-11527</del></a> tests: fix sanity 270a for ARM<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 8d83e2fef87c2668e03bd2d701eed7c9cc2d6970</p> <p>The above patch fixes the problem with O_DIRECT writes in test_270a for ARM, since it needs O_DIRECT to be aligned with PAGE_SIZE=64KB.  There is a separate problem with O_DIRECT and grant usage, which is being addressed by patch <a href="https://review.whamcloud.com/9454" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/9454</a> "<a href="https://jira.whamcloud.com/browse/LU-4664" title="sync write should consume grant on client" class="issue-link" data-issue-key="LU-4664"><del>LU-4664</del></a> clio: consume grant for sync write".</p> <p>Oleg Drokin (green@whamcloud.com) merged in patch <a href="https://review.whamcloud.com/33633/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/33633/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-11527" title="sanity test_270a failed with O_DIRECT on ARM" class="issue-link" data-issue-key="LU-11527"><del>LU-11527</del></a> tests: fix sanity 270a for ARM<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: 26eb3969f10168314fccfaeff0bfa275f4ea1b90</p> <p>Landed for 2.12</p> Related LU-4664 LU-11597 LU-11200 Development Rank 1|i004af: Rank (Obsolete) 9223372036854775807 Severity