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-5022 Lustre <p>tracker for 3.10 kernel support in rhel7</p> <p>The 3.10 kernel in the rhel7 rc2 image is quite different from the mainline upstream 3.10 in kernel.org. It includes many features from 3.12 and even 3.13 kernels. In general most of the recipe mentioned in <a href="https://jira.whamcloud.com/browse/LU-4416" title="support for 3.12 linux kernel" class="issue-link" data-issue-key="LU-4416"><del>LU-4416</del></a> for 3.12 kernels is needed in rhel7 too. The only 3.12 patch that isn't needed is <a href="http://review.whamcloud.com/9300" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/9300</a>.</p> <p>Establishing a separate tracker that will be specific to rhel7 as there are some mods that will only be relevant to the rhel7 kernel, and not 3.12 or later. One example is ldiskfs support. A new patch series specific to rhel7 will be needed.</p> rhel7 LU-5022

support for 3.10 rhel7 linux kernel

New Feature Critical Resolved Fixed Bob Glossman Bob Glossman HB Wed, 7 May 2014 16:24:38 +0000 Mon, 15 Jun 2015 16:06:39 +0000 Mon, 15 Jun 2015 16:06:39 +0000 Lustre 2.6.0 Lustre 2.8.0 0 14 <p>ldiskfs support for RHEL7:<br/> <a href="http://review.whamcloud.com/10249" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/10249</a></p> <p>Note that this patch series is majority identical to the one in progress for SLES 12. Only a few patches needed adjustment. Most applied cleanly unchanged. I am pushing them in their current form hoping to get some early review and comment from ldiskfs/ext4 experts.</p> <p>Oh boy!! I really like to see a base 3.12 ldisk set used by the major distros. We now have RHEL7, SLES12, and FCXX (<a href="https://jira.whamcloud.com/browse/LU-3373" title="ldiskfs patches for FC19" class="issue-link" data-issue-key="LU-3373"><del>LU-3373</del></a>). Also I like the idea of that separation so we can start pushing ldiskfs patches upstream.</p> <p>I'm pretty sure the ones for FCxx in <a href="https://jira.whamcloud.com/browse/LU-3373" title="ldiskfs patches for FC19" class="issue-link" data-issue-key="LU-3373"><del>LU-3373</del></a> are obsolete. I expect the author will Abandon them eventually, although I could be wrong.</p> <p>I would have no objection to structuring ldiskfs series as a reference set for upstream 3.12 with the SLES12 and RHEL7 versions being variations off of that reference.</p> <p>Maybe support for the 3.14 kernel in fc20 could also be off that same reference set, although I have yet to investigate that possibility.</p> <p>Great!! I think the 3.12 baseline patch set is the way to go. I plan to update the <a href="https://jira.whamcloud.com/browse/LU-3373" title="ldiskfs patches for FC19" class="issue-link" data-issue-key="LU-3373"><del>LU-3373</del></a> patch eventually. Just haven't had the time with all the other patches in the works.</p> <p>Yang can you post your RHEL7 test results. I like to compare them to my results from the SLES12/3.12 runs I do.</p> <p>minimum additional needed to build el7 servers:</p> <p><a href="http://review.whamcloud.com/#/c/8116" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/#/c/8116</a> - <a href="https://jira.whamcloud.com/browse/LU-3373" title="ldiskfs patches for FC19" class="issue-link" data-issue-key="LU-3373"><del>LU-3373</del></a> ext4_map_block support<br/> <a href="http://review.whamcloud.com/#/c/11088" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/#/c/11088</a> - <a href="https://jira.whamcloud.com/browse/LU-5276" title="ldiskfs patches for FC19" class="issue-link" data-issue-key="LU-5276"><del>LU-5276</del></a> ldiskfs: Remove extents-mount-option patch <br/> <a href="http://review.whamcloud.com/#/c/10249" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/#/c/10249</a> - <a href="https://jira.whamcloud.com/browse/LU-5022" title="support for 3.10 rhel7 linux kernel" class="issue-link" data-issue-key="LU-5022"><del>LU-5022</del></a> ldiskfs: enable support for RHEL7</p> <p>e2fsprogs and lbuild changes for el7 server are still TBD.</p> <p>lbuild changes for rhel 7 server<br/> <a href="http://review.whamcloud.com/12289" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/12289</a></p> <p>Now that the client work is done we should really discuss what is needed for proper server side support. This is are chance to push for a pathless server. First we need the quota performance enhancements. Those have been merged upstream as:</p> <p>commit b9ba6f94b2382ef832f97122976b73004f714714<br/> commit 9eb6463f31cf720deaf0e810cacc403d7720b10c<br/> commit 1ea06bec78a128adc995ca32bd906a6c9bb9cf91<br/> commit 606cdcca04a609ed4dfbfe788942de9477da556b<br/> commit d68aab6b8f572406aa93b45ef6483934dd3b54a6</p> <p>Which should engage RedHat to have these merged into their tree.</p> <p>We need to replace the dev_read_only patch with the work under <a href="https://jira.whamcloud.com/browse/LU-684" title="replace dev_rdonly kernel patch with dm-flakey" class="issue-link" data-issue-key="LU-684"><del>LU-684</del></a>. I haven't got around to it but now that the work for 2.7 is winding down I can take it up again.</p> <p>The bh_lru_size patch. I saw something go upstream but it seems to have been drop. It is a simple one line patch which we should push to get merged. Once merged it will be easy for RedHat to incorporate it into their tree.</p> <p>The block tunable patch. From the data posted in <a href="https://jira.whamcloud.com/browse/LU-20" title="patchless server kernel" class="issue-link" data-issue-key="LU-20"><del>LU-20</del></a> I really think it is not a benefit and we should just drop it.</p> <p>Lastly we have the patch under <a href="https://jira.whamcloud.com/browse/LU-3406" title="Submit raid5-mmp-unplug-dev patch upstream" class="issue-link" data-issue-key="LU-3406"><del>LU-3406</del></a> (raid5-mmp-unplug) which I just publish on dm-devel mailing list. Again we have it merged into the RHEL tree once it is integrated upstream.</p> <p>Oh I forgot but since SLES12 is now official we should make the RHEL7 ldiskfs patch use the patches from the <a href="https://jira.whamcloud.com/browse/LU-4416" title="support for 3.12 linux kernel" class="issue-link" data-issue-key="LU-4416"><del>LU-4416</del></a> SLES12 ldiskfs work like we originally did. Since RHEL7 changes far more often then SLES12 this can make sense plus this avoids the issue of SLES12 ldiskfs fixes being missed.</p> <p>A closer look at the report, this patch hit a LBUG in <a href="https://testing.hpdd.intel.com/test_logs/16c19292-658a-11e4-8c86-5254006e85c2/show_text" class="external-link" target="_blank" rel="nofollow noopener">https://testing.hpdd.intel.com/test_logs/16c19292-658a-11e4-8c86-5254006e85c2/show_text</a></p> <p>Yang Sheng (yang.sheng@intel.com) uploaded a new patch: <a href="http://review.whamcloud.com/10249" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/10249</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-5022" title="support for 3.10 rhel7 linux kernel" class="issue-link" data-issue-key="LU-5022"><del>LU-5022</del></a> ldiskfs: enable support for RHEL7<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 20<br/> Commit: d6683a2dd978dafa350e4e58c45df55cf44fe68f</p> <p>Yang Sheng (yang.sheng@intel.com) uploaded a new patch: <a href="http://review.whamcloud.com/13067" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/13067</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-5022" title="support for 3.10 rhel7 linux kernel" class="issue-link" data-issue-key="LU-5022"><del>LU-5022</del></a> ldiskfs: cleanup ldiskfs_journal_dirty_metadata<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 4a0457a9e3559c872faa59c5361d84a86d8ee71c</p> <p>Oleg Drokin (oleg.drokin@intel.com) merged in patch <a href="http://review.whamcloud.com/10249/" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/10249/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-5022" title="support for 3.10 rhel7 linux kernel" class="issue-link" data-issue-key="LU-5022"><del>LU-5022</del></a> ldiskfs: enable support for RHEL7<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: eaf30e35002bf3936cdf7bf83685552d854f0f88</p> <p>Here are the quota upstream patches that the RHEL7 kernel needs. It might need some massaging to have it apply to the RHEL7 kernel.</p> <p>I am pretty sure all the needed changes from James' attachment are already in place in upstream quota code in el7. only 2 minor exceptions:</p> <p>1) the dqptr_sem deleted by the first patch still exists. all the references to it are gone, but the data structure was left in place. I'm assuming whoever ported this into el7 did it deliberately so I'm not willing to change it.</p> <p>2) the last patch adding in locking around the shrinker doesn't seem to apply or be relevant. there is no dqcache_shrink_scan() routine in el7 to be fixed up.</p> <p>That is good news. So it looks like we don't need the quota patch. Will need to look into SuSE12 to see if it is case there.</p> <p>James, I will do so as time permits. </p> <p>Have you considered dropping the block tunable patch?</p> <p>no. as far as I can tell block tunable is still needed. until it can be deleted from old distros I don't think it should be deleted from el7.</p> <p>It seems lbuild-rhel7 is missing in contrib/lbuild/Makefile.am. We should add it in some patch. Maybe <a href="http://review.whamcloud.com/#/c/12289/" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/#/c/12289/</a></p> <p>quite correct. I will add it to the next version of <a href="http://review.whamcloud.com/#/c/12289" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/#/c/12289</a>. </p> <p>Oleg Drokin (oleg.drokin@intel.com) merged in patch <a href="http://review.whamcloud.com/12289/" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/12289/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-5022" title="support for 3.10 rhel7 linux kernel" class="issue-link" data-issue-key="LU-5022"><del>LU-5022</del></a> build: add rhel7 to server build selections<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: c6091a8302b359bd0e28082fef656f0532624143</p> <p>Bob is this work complete now?</p> <p>James, As far as I know yes it is complete.</p> <p>Then let's mark it resolved! <img class="emoticon" src="https://jira.whamcloud.com/images/icons/emoticons/smile.png" height="16" width="16" align="absmiddle" alt="" border="0"/></p> Related LU-5014 LU-5853 LU-5825 LU-4416 LU-5626 LU-6096 LU-5307 LU-5884 LU-5310 Development Rank 1|hzwm0v: Rank (Obsolete) 13898