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-405 Lustre <p>This is basically the same issue as bug 20055. NFS lookup path is quite different than that of normal VFS and as the result a number of disconnected dentries might appear on Lustre inode.</p> <p>We probably jus tneed to have the same workaround as in 1.8 - to disable the assertion</p> LU-405

NFS4 reexport fails with ll_find_alias()) ASSERTION(last_discon == NULL)

Bug Blocker Resolved Fixed Oleg Drokin Oleg Drokin Thu, 9 Jun 2011 11:57:58 +0000 Fri, 17 Jun 2011 00:46:27 +0000 Fri, 17 Jun 2011 00:46:27 +0000 Lustre 2.1.0 0 2 <p>As part of Fan Yong's work to redo the statahead code to play more nicely with the dcache, I also want him to investigate reworking the entire llite VFS code to use more modern dcache interfaces like d_find_alias(), d_obtain_alias(), d_splice_alias(), etc.</p> <p>I have a feeling that with the introduction of other cluster filesystems into the kernel that the problems we had back in the 2.4 days are gone, and our conditional code for building against those kernels should also be removed. As well, the 2.6.38 kernel introduced significant changes to the dcache (lockless lookup) and we should be prepared to run on such newer kernels sooner rather than later.</p> <p>A bit of refactoring work was started already.<br/> It's in bug 16417, att 24200.<br/> Might be I just need to update it to current code.</p> <p>Hmmm. Would it not make sense to use an existing proven workaround for 2.1 and defer the re-engineering until 2.2?</p> <p>I don't think Andreas is proposing to not deploy the workaround, rather this is some future work outlined by him.</p> <p>Ah ok, then it would probably be best to track under a separate ticket</p> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-master/./arch=x86_64,build_type=client,distro=el5,ib_stack=inkernel/176/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » x86_64,client,el5,inkernel #176</a><br/> <a href="https://jira.whamcloud.com/browse/LU-405" title="NFS4 reexport fails with ll_find_alias()) ASSERTION(last_discon == NULL)" class="issue-link" data-issue-key="LU-405"><del>LU-405</del></a> Don't assert on multiple disconnected dentries case</p> <p>Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=a1b2d35d18884c4c785dc5ab4978d70a2b9ba864" class="external-link" target="_blank" rel="nofollow noopener">a1b2d35d18884c4c785dc5ab4978d70a2b9ba864</a><br/> Files : </p> <ul> <li>lustre/llite/namei.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-master/./arch=x86_64,build_type=client,distro=sles11,ib_stack=inkernel/176/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » x86_64,client,sles11,inkernel #176</a><br/> <a href="https://jira.whamcloud.com/browse/LU-405" title="NFS4 reexport fails with ll_find_alias()) ASSERTION(last_discon == NULL)" class="issue-link" data-issue-key="LU-405"><del>LU-405</del></a> Don't assert on multiple disconnected dentries case</p> <p>Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=a1b2d35d18884c4c785dc5ab4978d70a2b9ba864" class="external-link" target="_blank" rel="nofollow noopener">a1b2d35d18884c4c785dc5ab4978d70a2b9ba864</a><br/> Files : </p> <ul> <li>lustre/llite/namei.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-master/./arch=x86_64,build_type=client,distro=el6,ib_stack=inkernel/176/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » x86_64,client,el6,inkernel #176</a><br/> <a href="https://jira.whamcloud.com/browse/LU-405" title="NFS4 reexport fails with ll_find_alias()) ASSERTION(last_discon == NULL)" class="issue-link" data-issue-key="LU-405"><del>LU-405</del></a> Don't assert on multiple disconnected dentries case</p> <p>Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=a1b2d35d18884c4c785dc5ab4978d70a2b9ba864" class="external-link" target="_blank" rel="nofollow noopener">a1b2d35d18884c4c785dc5ab4978d70a2b9ba864</a><br/> Files : </p> <ul> <li>lustre/llite/namei.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-master/./arch=i686,build_type=client,distro=el5,ib_stack=inkernel/176/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » i686,client,el5,inkernel #176</a><br/> <a href="https://jira.whamcloud.com/browse/LU-405" title="NFS4 reexport fails with ll_find_alias()) ASSERTION(last_discon == NULL)" class="issue-link" data-issue-key="LU-405"><del>LU-405</del></a> Don't assert on multiple disconnected dentries case</p> <p>Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=a1b2d35d18884c4c785dc5ab4978d70a2b9ba864" class="external-link" target="_blank" rel="nofollow noopener">a1b2d35d18884c4c785dc5ab4978d70a2b9ba864</a><br/> Files : </p> <ul> <li>lustre/llite/namei.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-master/./arch=x86_64,build_type=client,distro=ubuntu1004,ib_stack=inkernel/176/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » x86_64,client,ubuntu1004,inkernel #176</a><br/> <a href="https://jira.whamcloud.com/browse/LU-405" title="NFS4 reexport fails with ll_find_alias()) ASSERTION(last_discon == NULL)" class="issue-link" data-issue-key="LU-405"><del>LU-405</del></a> Don't assert on multiple disconnected dentries case</p> <p>Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=a1b2d35d18884c4c785dc5ab4978d70a2b9ba864" class="external-link" target="_blank" rel="nofollow noopener">a1b2d35d18884c4c785dc5ab4978d70a2b9ba864</a><br/> Files : </p> <ul> <li>lustre/llite/namei.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-master/./arch=i686,build_type=server,distro=el5,ib_stack=ofa/176/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » i686,server,el5,ofa #176</a><br/> <a href="https://jira.whamcloud.com/browse/LU-405" title="NFS4 reexport fails with ll_find_alias()) ASSERTION(last_discon == NULL)" class="issue-link" data-issue-key="LU-405"><del>LU-405</del></a> Don't assert on multiple disconnected dentries case</p> <p>Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=a1b2d35d18884c4c785dc5ab4978d70a2b9ba864" class="external-link" target="_blank" rel="nofollow noopener">a1b2d35d18884c4c785dc5ab4978d70a2b9ba864</a><br/> Files : </p> <ul> <li>lustre/llite/namei.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-master/./arch=i686,build_type=server,distro=el6,ib_stack=inkernel/176/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » i686,server,el6,inkernel #176</a><br/> <a href="https://jira.whamcloud.com/browse/LU-405" title="NFS4 reexport fails with ll_find_alias()) ASSERTION(last_discon == NULL)" class="issue-link" data-issue-key="LU-405"><del>LU-405</del></a> Don't assert on multiple disconnected dentries case</p> <p>Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=a1b2d35d18884c4c785dc5ab4978d70a2b9ba864" class="external-link" target="_blank" rel="nofollow noopener">a1b2d35d18884c4c785dc5ab4978d70a2b9ba864</a><br/> Files : </p> <ul> <li>lustre/llite/namei.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-master/./arch=x86_64,build_type=client,distro=el5,ib_stack=ofa/176/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » x86_64,client,el5,ofa #176</a><br/> <a href="https://jira.whamcloud.com/browse/LU-405" title="NFS4 reexport fails with ll_find_alias()) ASSERTION(last_discon == NULL)" class="issue-link" data-issue-key="LU-405"><del>LU-405</del></a> Don't assert on multiple disconnected dentries case</p> <p>Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=a1b2d35d18884c4c785dc5ab4978d70a2b9ba864" class="external-link" target="_blank" rel="nofollow noopener">a1b2d35d18884c4c785dc5ab4978d70a2b9ba864</a><br/> Files : </p> <ul> <li>lustre/llite/namei.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-master/./arch=x86_64,build_type=server,distro=el5,ib_stack=inkernel/176/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » x86_64,server,el5,inkernel #176</a><br/> <a href="https://jira.whamcloud.com/browse/LU-405" title="NFS4 reexport fails with ll_find_alias()) ASSERTION(last_discon == NULL)" class="issue-link" data-issue-key="LU-405"><del>LU-405</del></a> Don't assert on multiple disconnected dentries case</p> <p>Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=a1b2d35d18884c4c785dc5ab4978d70a2b9ba864" class="external-link" target="_blank" rel="nofollow noopener">a1b2d35d18884c4c785dc5ab4978d70a2b9ba864</a><br/> Files : </p> <ul> <li>lustre/llite/namei.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-master/./arch=x86_64,build_type=server,distro=el6,ib_stack=inkernel/176/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » x86_64,server,el6,inkernel #176</a><br/> <a href="https://jira.whamcloud.com/browse/LU-405" title="NFS4 reexport fails with ll_find_alias()) ASSERTION(last_discon == NULL)" class="issue-link" data-issue-key="LU-405"><del>LU-405</del></a> Don't assert on multiple disconnected dentries case</p> <p>Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=a1b2d35d18884c4c785dc5ab4978d70a2b9ba864" class="external-link" target="_blank" rel="nofollow noopener">a1b2d35d18884c4c785dc5ab4978d70a2b9ba864</a><br/> Files : </p> <ul> <li>lustre/llite/namei.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-master/./arch=x86_64,build_type=client,distro=ubuntu1004,ib_stack=ofa/176/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » x86_64,client,ubuntu1004,ofa #176</a><br/> <a href="https://jira.whamcloud.com/browse/LU-405" title="NFS4 reexport fails with ll_find_alias()) ASSERTION(last_discon == NULL)" class="issue-link" data-issue-key="LU-405"><del>LU-405</del></a> Don't assert on multiple disconnected dentries case</p> <p>Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=a1b2d35d18884c4c785dc5ab4978d70a2b9ba864" class="external-link" target="_blank" rel="nofollow noopener">a1b2d35d18884c4c785dc5ab4978d70a2b9ba864</a><br/> Files : </p> <ul> <li>lustre/llite/namei.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-master/./arch=i686,build_type=server,distro=el5,ib_stack=inkernel/176/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » i686,server,el5,inkernel #176</a><br/> <a href="https://jira.whamcloud.com/browse/LU-405" title="NFS4 reexport fails with ll_find_alias()) ASSERTION(last_discon == NULL)" class="issue-link" data-issue-key="LU-405"><del>LU-405</del></a> Don't assert on multiple disconnected dentries case</p> <p>Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=a1b2d35d18884c4c785dc5ab4978d70a2b9ba864" class="external-link" target="_blank" rel="nofollow noopener">a1b2d35d18884c4c785dc5ab4978d70a2b9ba864</a><br/> Files : </p> <ul> <li>lustre/llite/namei.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-master/./arch=i686,build_type=client,distro=el5,ib_stack=ofa/176/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » i686,client,el5,ofa #176</a><br/> <a href="https://jira.whamcloud.com/browse/LU-405" title="NFS4 reexport fails with ll_find_alias()) ASSERTION(last_discon == NULL)" class="issue-link" data-issue-key="LU-405"><del>LU-405</del></a> Don't assert on multiple disconnected dentries case</p> <p>Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=a1b2d35d18884c4c785dc5ab4978d70a2b9ba864" class="external-link" target="_blank" rel="nofollow noopener">a1b2d35d18884c4c785dc5ab4978d70a2b9ba864</a><br/> Files : </p> <ul> <li>lustre/llite/namei.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-master/./arch=i686,build_type=client,distro=el6,ib_stack=inkernel/176/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » i686,client,el6,inkernel #176</a><br/> <a href="https://jira.whamcloud.com/browse/LU-405" title="NFS4 reexport fails with ll_find_alias()) ASSERTION(last_discon == NULL)" class="issue-link" data-issue-key="LU-405"><del>LU-405</del></a> Don't assert on multiple disconnected dentries case</p> <p>Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=a1b2d35d18884c4c785dc5ab4978d70a2b9ba864" class="external-link" target="_blank" rel="nofollow noopener">a1b2d35d18884c4c785dc5ab4978d70a2b9ba864</a><br/> Files : </p> <ul> <li>lustre/llite/namei.c</li> </ul> <p>Integrated in <span class="image-wrap" style=""><img src="http://newbuild.whamcloud.com/images/16x16/blue.png" style="border: 0px solid black" /></span> <a href="http://newbuild.whamcloud.com/job/lustre-master/./arch=x86_64,build_type=server,distro=el5,ib_stack=ofa/176/" class="external-link" target="_blank" rel="nofollow noopener">lustre-master » x86_64,server,el5,ofa #176</a><br/> <a href="https://jira.whamcloud.com/browse/LU-405" title="NFS4 reexport fails with ll_find_alias()) ASSERTION(last_discon == NULL)" class="issue-link" data-issue-key="LU-405"><del>LU-405</del></a> Don't assert on multiple disconnected dentries case</p> <p>Oleg Drokin : <a href="http://git.whamcloud.com/gitweb?p=fs/lustre-release.git;a=shortlog;h=refs/heads/master&amp;a=commit&amp;h=a1b2d35d18884c4c785dc5ab4978d70a2b9ba864" class="external-link" target="_blank" rel="nofollow noopener">a1b2d35d18884c4c785dc5ab4978d70a2b9ba864</a><br/> Files : </p> <ul> <li>lustre/llite/namei.c</li> </ul> <p>Landed for 2.1</p> Bugzilla ID 20055.0 Development Rank 1|hzv8xb: Rank (Obsolete) 4980 Severity