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From: Rustam Kovhaev <rkovhaev@gmail.com>
To: Vlastimil Babka <vbabka@suse.cz>
Cc: "Darrick J. Wong" <djwong@kernel.org>,
	David Rientjes <rientjes@google.com>,
	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: Wed, 13 Oct 2021 09:56:41 -0700	[thread overview]
Message-ID: <YWcPyYk0Rlyvl9a9@nuc10> (raw)
In-Reply-To: <3928ef69-eaac-241c-eb32-d2dd2eab9384@suse.cz>

On Wed, Oct 13, 2021 at 09:38:31AM +0200, Vlastimil Babka wrote:
> On 10/13/21 01:22, Darrick J. Wong wrote:
> > On Tue, Oct 12, 2021 at 11:32:25PM +0200, Vlastimil Babka wrote:
> >> On 10/12/2021 10:43 PM, Darrick J. Wong wrote:
> >> > On Tue, Oct 12, 2021 at 01:43:20PM -0700, Darrick J. Wong wrote:
> >> >> On Sun, Oct 03, 2021 at 06:07:20PM -0700, David Rientjes wrote:
> >> >>
> >> >> 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.
> >> 
> >> Which patch, the one that started this thread and uses kmem_cache_free() instead
> >> of kfree()? I thought we said it's not the best way?
> > 
> > It's probably better to fix slob to be able to tell that a kmem_free'd
> > object actually belongs to a cache and should get freed that way, just
> > like its larger sl[ua]b cousins.
> 
> Agreed. Rustam, do you still plan to do that?

Yes, I do, thank you.

> 
> > However, even if that does come to pass, anybody /else/ who wants to
> > start(?) using XFS on a SLOB system will need this patch to fix the
> > minor papercut.  Now that I've checked the rest of the codebase, I don't
> > find it reasonable to make XFS mutually exclusive with SLOB over two
> > instances of slab cache misuse.  Hence the RVB. :)
> 
> Ok. I was just wondering because Dave's first reply was that actually you'll
> need to expand the use of kfree() instead of kmem_cache_free().
> 

  reply	other threads:[~2021-10-13 16:57 UTC|newest]

Thread overview: 43+ 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
2021-10-04  1:07             ` David Rientjes
2021-10-12 20:43             ` Darrick J. Wong
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 [this message]
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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