From: Vlastimil Babka <vbabka@suse.cz>
To: Rustam Kovhaev <rkovhaev@gmail.com>
Cc: Dave Chinner <david@fromorbit.com>,
djwong@kernel.org, linux-xfs@vger.kernel.org, cl@linux.com,
penberg@kernel.org, rientjes@google.com, 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>
Subject: Re: [PATCH] xfs: use kmem_cache_free() for kmem_cache objects
Date: Thu, 30 Sep 2021 23:10:10 +0200 [thread overview]
Message-ID: <a9b3cd91-8ee6-a654-b2a8-00c3efb69559@suse.cz> (raw)
In-Reply-To: <YVYGcLbu/aDKXkag@nuc10>
On 9/30/21 8:48 PM, Rustam Kovhaev wrote:
> On Thu, Sep 30, 2021 at 10:13:40AM +0200, Vlastimil Babka 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.
>> Maybe we could also just add the 4 bytes to all SLOB objects, declare
>> kfree() is always fine and be done with it. Yes, it will make SLOB footprint
>> somewhat less tiny, but even whan we added kmalloc power of two alignment
>> guarantees, the impact on SLOB was negligible.
>
> I'll send a patch to add a 4-byte header for kmem_cache_alloc()
> allocations.
Thanks. Please report in the changelog slab usage from /proc/meminfo
before and after patch (at least a snapshot after a full boot).
>>> Thoughts?
>>>
>>> Cheers,
>>>
>>> Dave.
>>>
>>
next prev parent reply other threads:[~2021-09-30 21:11 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-29 21:23 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 [this message]
2021-10-01 0:32 ` Rustam Kovhaev
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
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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