Re: [PATCH] vfs: use RCU in ilookup

[Mateusz Guzik]

On Mon, Jul 15, 2024 at 10:02 AM Bharata B Rao <bharata@xxxxxxx> wrote:
>
> On 15-Jul-24 12:43 PM, Mateusz Guzik wrote:
> > A soft lockup in ilookup was reported when stress-testing a 512-way
> > system [1] (see [2] for full context) and it was verified that not
> > taking the lock shifts issues back to mm.
> >
> > [1] https://lore.kernel.org/linux-mm/56865e57-c250-44da-9713-cf1404595bcc@xxxxxxx/
>
> Mateusz,
>
> Just want to mention explicitly that in addition to the lockless lookup
> changes that you suggested in [1], the test run also included your other
> commit
> https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git/commit/?h=vfs.inode.rcu&id=7180f8d91fcbf252de572d9ffacc945effed0060
> as you had suggested.
>

That commit is needed to have this compile to begin with, so it was
kind of implied. :)

-- 
Mateusz Guzik <mjguzik gmail.com>