Whamcloud Community JIRA https://jira.whamcloud.com This file is an XML representation of an issue en-us 9.4.14 940014 05-12-2023 [LU-16609] top_trans_create() can oom due to the gfp flags https://jira.whamcloud.com/browse/LU-16609 Lustre <p><font color="#000000">top_trans_create() requests __GFP_IO memory allocation, </font><br/> which does not allow direct reclaim. However, if the <br/> memory shortage is temporary, direct reclaim is reasonable. </p> <p>GFP_NOFS is __GFP_IO with some additional reclaim bits.</p> LU-16609 top_trans_create() can oom due to the gfp flags Bug Major Resolved Fixed Andrew Perepechko Andrew Perepechko Wed, 1 Mar 2023 21:49:11 +0000 Thu, 9 Nov 2023 08:43:04 +0000 Tue, 18 Apr 2023 12:09:44 +0000 Lustre 2.16.0 0 3 <p>"Andrew Perepechko &lt;andrew.perepechko@hpe.com&gt;" uploaded a new patch: <a href="https://review.whamcloud.com/c/fs/lustre-release/+/50176" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/c/fs/lustre-release/+/50176</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-16609" title="top_trans_create() can oom due to the gfp flags" class="issue-link" data-issue-key="LU-16609"><del>LU-16609</del></a> target: top_trans_create cannot alloc memory<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 909bf5257eb33fe45071cf52f7a00ccf3fb72e12</p> <p>__GFP_IO alone does not make sense because this bit is only used by the memory reclaimer, so we need explicitly to specify that we want memory reclaim (bound by __GFP_IO, of course):</p> <p> </p> <p>#define GFP_NOFS        (__GFP_RECLAIM | __GFP_IO)</p> <p>#define __GFP_RECLAIM ((force gfp_t)(_GFP_DIRECT_RECLAIM|_GFP_KSWAPD_RECLAIM))</p> <p>"Oleg Drokin &lt;green@whamcloud.com&gt;" merged in patch <a href="https://review.whamcloud.com/c/fs/lustre-release/+/50176/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/c/fs/lustre-release/+/50176/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-16609" title="top_trans_create() can oom due to the gfp flags" class="issue-link" data-issue-key="LU-16609"><del>LU-16609</del></a> target: top_trans_create cannot alloc memory<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: 9d1f8f1e3557ee3349c623f4f5596df44f60b082</p> <p>Landed for 2.16</p> Related Development Rank 1|i03fgf: Rank (Obsolete) 9223372036854775807 Severity