Messages in this thread | | | Date | Tue, 20 Jun 2017 18:22:05 -0400 | From | Steven Rostedt <> | Subject | Re: [PATCH] slub: make sysfs file removal asynchronous |
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On Tue, 20 Jun 2017 18:00:11 -0400 Tejun Heo <tj@kernel.org> wrote:
> > > Signed-off-by: Tejun Heo <tj@kernel.org> > > > Reported-by: Steven Rostedt (VMware) <rostedt@goodmis.org> > > > Tested-by: Steven Rostedt (VMware) <rostedt@goodmis.org> > > > Fixes: bf5eb3de3847 ("slub: separate out sysfs_slab_release() from sysfs_slab_remove()") > > > > Do you think we should add cc:stable [4.11+]? > > I think we'd risk more by backporting it through -stable than keeping > the bug there. The bug is very difficult to hit.
Famous last words.
> Writing to a slub > sysfs file has to race against kmem_cache destruction and AFAICS all > slub sysfs files are for debugging.
It's not that big of a change. It's simply moving the work to a work queue. I've done bigger changes than this and backported it to stable for similar reasons.
All it takes is for it to be hit once in a billion, and that billionth time could be critical.
-- Steve
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