Messages in this thread | | | Date | Mon, 20 Jun 2022 15:09:50 +0100 | From | Mel Gorman <> | Subject | Re: Lockups due to "locking/rwsem: Make handoff bit handling more consistent" |
| |
On Fri, Jun 17, 2022 at 10:29:20AM -0400, Waiman Long wrote: > > The C file and shell script to run it are attached. > > > Thanks for the reproducer and I will try to reproduce it locally. > > It is a known issue that I have receive similar report from an Oracle > engineer. That is the reason I posted commit 1ee326196c66 ("locking/rwsem: > Always try to wake waiters in out_nolock path") that was merged in v5.19. I > believe it helps but it may not be able to eliminate all possible race > conditions. To make rwsem behave more like before commit d257cc8cb8d5 > ("locking/rwsem: Make handoff bit handling more consistent"), I posted a > follow-up patch > > https://lore.kernel.org/lkml/20220427173124.1428050-1-longman@redhat.com/ > > But it hasn't gotten review yet. >
FWIW, the patch passed the test case when applied to both 5.18 and 5.19-rc3.
-- Mel Gorman SUSE Labs
| |