From: "Darrick J. Wong" <djwong@kernel.org>
To: David Rientjes <rientjes@google.com>
Cc: Rustam Kovhaev <rkovhaev@gmail.com>,
Vlastimil Babka <vbabka@suse.cz>,
Dave Chinner <david@fromorbit.com>,
linux-xfs@vger.kernel.org, cl@linux.com, penberg@kernel.org,
iamjoonsoo.kim@lge.com, akpm@linux-foundation.org,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
gregkh@linuxfoundation.org, Al Viro <viro@zeniv.linux.org.uk>,
dvyukov@google.com
Subject: Re: [PATCH] xfs: use kmem_cache_free() for kmem_cache objects
Date: Tue, 12 Oct 2021 13:43:20 -0700 [thread overview]
Message-ID: <20211012204320.GP24307@magnolia> (raw)
In-Reply-To: <1e0df91-556e-cee5-76f7-285d28fe31@google.com>
On Sun, Oct 03, 2021 at 06:07:20PM -0700, David Rientjes wrote:
> On Thu, 30 Sep 2021, Rustam Kovhaev wrote:
>
> > > >> I think it's fair if something like XFS (not meant for tiny systems AFAIK?)
> > > >> excludes SLOB (meant for tiny systems). Clearly nobody tried to use these
> > > >> two together last 5 years anyway.
> > > >
> > > > +1 for adding Kconfig option, it seems like some things are not meant to
> > > > be together.
> > >
> > > But if we patch SLOB, we won't need it.
> >
> > OK, so we consider XFS on SLOB a supported configuration that might be
> > used and should be tested.
> > I'll look into maybe adding a config with CONFIG_SLOB and CONFIG_XFS_FS
> > to syzbot.
> >
> > It seems that we need to patch SLOB anyway, because any other code can
> > hit the very same issue.
> >
>
> It's probably best to introduce both (SLOB fix and Kconfig change for
> XFS), at least in the interim because the combo of XFS and SLOB could be
> broken in other ways. If syzbot doesn't complain with a patched kernel to
> allow SLOB to be used with XFS, then we could potentially allow them to be
> used together.
>
> (I'm not sure that this freeing issue is the *only* thing that is broken,
> nor that we have sufficient information to make that determination right
> now..)
I audited the entire xfs (kernel) codebase and didn't find any other
usage errors. Thanks for the patch; I'll apply it to for-next.
--D
next prev parent reply other threads:[~2021-10-12 20:43 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-29 21:23 [PATCH] xfs: use kmem_cache_free() for kmem_cache objects Rustam Kovhaev
2021-09-30 4:42 ` Dave Chinner
2021-09-30 8:13 ` Vlastimil Babka
2021-09-30 18:48 ` Rustam Kovhaev
2021-09-30 21:10 ` Vlastimil Babka
2021-10-01 0:32 ` Rustam Kovhaev
2021-10-04 1:07 ` David Rientjes
2021-10-12 20:43 ` Darrick J. Wong [this message]
2021-10-12 20:43 ` Darrick J. Wong
2021-10-12 21:32 ` Vlastimil Babka
2021-10-12 23:22 ` Darrick J. Wong
2021-10-13 7:38 ` Vlastimil Babka
2021-10-13 16:56 ` Rustam Kovhaev
2021-10-15 0:57 ` Darrick J. Wong
2021-10-18 3:38 ` [PATCH] slob: add size header to all allocations Rustam Kovhaev
2021-10-18 9:22 ` Vlastimil Babka
2021-10-19 1:22 ` Rustam Kovhaev
2021-10-20 11:46 ` Hyeonggon Yoo
2021-10-21 17:36 ` Vlastimil Babka
2021-10-23 6:41 ` [PATCH v2] " Rustam Kovhaev
2021-10-25 9:36 ` Vlastimil Babka
2021-10-25 21:49 ` Rustam Kovhaev
2021-10-29 3:05 ` [PATCH v3] " Rustam Kovhaev
2021-11-16 11:26 ` Vlastimil Babka
2021-11-16 23:19 ` Rustam Kovhaev
2021-11-22 1:30 ` [PATCH v4] " Rustam Kovhaev
2021-11-22 9:22 ` Christoph Lameter
2021-11-22 9:40 ` Vlastimil Babka
2021-11-22 10:36 ` Christoph Lameter
2021-11-22 10:45 ` Vlastimil Babka
2021-11-22 11:40 ` Christoph Lameter
2021-11-22 11:49 ` Vlastimil Babka
2021-11-23 10:18 ` David Laight
2021-11-30 7:00 ` Rustam Kovhaev
2021-11-30 9:23 ` David Laight
2021-11-30 9:41 ` Christoph Lameter
2021-11-30 14:55 ` Vlastimil Babka
2021-11-30 15:21 ` David Laight
2021-11-30 15:39 ` Vlastimil Babka
2021-11-30 15:26 ` Christoph Lameter
2021-10-24 10:43 ` [PATCH] " Hyeonggon Yoo
2021-10-25 8:19 ` Vlastimil Babka
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