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-253 Lustre <p>After installing a patched kernel from build.whamcloud.com, it is not possible to reliably distinguish if this kernel is patched for 1.8 Lustre or 2.1 Lustre.</p> LU-253

1.8 and 2.1 Patched kernels are indistinguishable to a user.

Bug Minor Resolved Won't Fix WC Triage Richard Henwood Fri, 29 Apr 2011 11:23:30 +0000 Mon, 29 May 2017 00:42:28 +0000 Mon, 29 May 2017 00:42:28 +0000 0 1 <p>I wouldn't object to us shipping a single kernel for both 1.8 and 2.1 that had all of the needed patches. That would allow customers to upgrade their 1.8 installation to a 1.8.6.wc1 (or whatever) with the unified-patch kernel, and then only have to upgrade the Lustre RPMs in order to move to 2.1 (or back again, if needed). This is definitely a "value add" that we can do for users that get their 1.8.6 from WC.</p> <p>It looks in fact that the diff between the 1.8.6 RHEL5 kernel and master RHEL5 are fairly minor:</p> <p>-i_filter_data.patch</p> <p>This one could be ignored, we don't use i_filter_data even on 1.8, I believe.</p> <p>-md-mmp-unplug-dev.patch<br/> +raid5-mmp-unplug-dev.patch</p> <p>Just a patch rename, not sure why it was done.</p> <p>+export-symbols-for-dmu.patch</p> <p>This one is for ZFS, which won't be running on RHEL5, so we could drop it. I believe that the SPL code can work around unexported symbols anyway.</p> <p>+small-fixes-about-jbd.patch<br/> +prune-icache-use-trylock-rhel5.patch<br/> +lustre_iser_max_sectors_tuning_lustre2.0.patch</p> <p>A couple of minor patches, probably useful for 1.8 also.</p> <p>The bigger delta exists for ldiskfs patches, but even that is not so large to make it difficult to have a single ldiskfs RPM for 1.8 and 2.1, if we want to do that. However, it is the kernel that would be the big win, IMHO.</p> <p>That's an excellent idea. We could also consider moving the lustre/kernel_patches directory to a separate repository so we could manage a single version for both lustre versions. </p> <p>Moving to patchless server kernels (<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>) will also fix this issue.</p> Development Rank 1|hzw3fj: Rank (Obsolete) 10640 Severity