** Changed in: linux (Ubuntu)
Status: New => Triaged
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https://bugs.launchpad.net/bugs/2089728
Title:
Wait sync io to finish before changing group cnt
Status in linux package in Ubuntu:
Triaged
Status in linux source package in Noble:
Triaged
Status in linux source package in Oracular:
Triaged
Bug description:
The upstream Linux kernel fixed a hang:
https://github.com/torvalds/linux/commit/fa1944bbe6220eb929e2c02e5e8706b908565711
"One customer reports a bug: raid5 is hung when changing thread cnt
while resync is running. The stripes are all in conf->handle_list
and new threads can't handle them.
Commit b39f35e ("md: don't quiesce in mddev_suspend()") removes
pers->quiesce from mddev_suspend/resume. Before this patch, mddev_suspend
needs to wait for all ios including sync io to finish. Now it's used
to only wait normal io.
Fix this by calling raid5_quiesce from raid5_store_group_thread_cnt
directly to wait all sync requests to finish before changing the group
cnt."
I check the latest code of ubuntu, but this patch is not applied to ubuntu.
Shall we cherrypick this patch?
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