Hi @Eric, Updated the description with SRU. Please let me know if anything needs change/unclear. Thanks.
** Description changed: - A new plugin for bcache stats are proposed upstream [0] and there's a PR - currently under review [1]. + [Impact] + + Gather bcache stats as part of sos report. + + Bcache is often deployed as a "frontend" (typically using SSDs) for Ceph + cluster's with HDDs to improve performance. When we are dealing with + bcache performance or need to debug bcache, these stats are essential to + identify the problem. The newly added plugin collects various stats on + bcache. - [0] https://github.com/sosreport/sos/issues/2378 - [1] https://github.com/sosreport/sos/pull/2384 + [Test Case] + + It's a new plugin. When sosreport is run on a system with bcache, a + number of small files from /sys/fs/bcache and /sys/block/bcache should + be collected with this plugin in place. On systems, without bcache, this + should be a no-op. + + + [Where problems could occur] + + Worst case scenarios could be: + - As with any plugin, this plugin, in theory, could potentially run indefinitely and timeout. + - Affect performance when run on a live system. There's one known case where querying the proiorty_stats [0] had such a problem. But it's not collected as part of this plugin. + + But otherwise, the stats collection of bcache devices (even if there are + many bcache devices deployed on a system) shouldn't affect anything on a + live system and shouldn't get anywhere closer to timeout. + + + [Other Info] + + upstream PR (merged): https://github.com/sosreport/sos/pull/2384 + + + [0] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1840043 ** Summary changed: - [plugin] [bcache] add a new bcache plugin + [SRU] [plugin] [bcache] add a new bcache plugin -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1913284 Title: [SRU] [plugin] [bcache] add a new bcache plugin To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/sosreport/+bug/1913284/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
