From: Nikita Danilov <nikita@clusterfs.com>
To: Andrew Morton <akpm@osdl.org>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, hch@infradead.org
Subject: Re: [RFC] per thread page reservation patch
Date: Fri, 07 Jan 2005 23:21:19 +0300 [thread overview]
Message-ID: <m1u0ptq9c0.fsf@clusterfs.com> (raw)
In-Reply-To: <20050107104838.0eacd301.akpm@osdl.org> (Andrew Morton's message of "Fri, 7 Jan 2005 10:48:38 -0800")
Andrew Morton <akpm@osdl.org> writes:
> Vladimir Saveliev <vs@namesys.com> wrote:
>>
>> +int perthread_pages_reserve(int nrpages, int gfp)
>> +{
>> + int i;
>> + struct list_head accumulator;
>> + struct list_head *per_thread;
>> +
>> + per_thread = get_per_thread_pages();
>> + INIT_LIST_HEAD(&accumulator);
>> + list_splice_init(per_thread, &accumulator);
>> + for (i = 0; i < nrpages; ++i) {
>
> This will end up reserving more pages than were asked for, if
> current->private_pages_count is non-zero. Deliberate?
Yes. This is to make modular usage possible, so that
perthread_pages_reserve(nrpages, gfp_mask);
/* call some other code... */
perthread_pages_release(unused_pages);
works correctly if "some other code" does per-thread reservations
too.
Nikita.
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next prev parent reply other threads:[~2005-01-07 20:21 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20050103011113.6f6c8f44.akpm@osdl.org>
[not found] ` <20050103114854.GA18408@infradead.org>
[not found] ` <41DC2386.9010701@namesys.com>
[not found] ` <1105019521.7074.79.camel@tribesman.namesys.com>
[not found] ` <20050107144644.GA9606@infradead.org>
2005-01-07 17:16 ` Vladimir Saveliev
2005-01-07 18:48 ` Andrew Morton
2005-01-07 20:21 ` Nikita Danilov [this message]
2005-01-07 19:05 ` Christoph Hellwig
2005-01-07 19:12 ` Christoph Hellwig
2005-01-07 19:21 ` Robert Love
2005-01-07 20:48 ` Nikita Danilov
2005-01-07 20:54 ` Christoph Hellwig
2005-01-07 21:00 ` Nikita Danilov
2005-01-07 21:07 ` Christoph Hellwig
2005-01-07 19:14 ` Paulo Marques
2005-01-07 19:32 ` Christoph Hellwig
2005-01-07 19:42 ` Andi Kleen
2005-01-07 20:55 ` Nikita Danilov
2005-01-07 21:24 ` Andrew Morton
2005-01-07 21:24 ` Andi Kleen
2005-01-07 22:12 ` Nikita Danilov
2005-01-07 23:03 ` Andrew Morton
2005-01-07 23:17 ` Nikita Danilov
2005-01-07 23:43 ` Andrew Morton
2005-01-08 12:44 ` Nikita Danilov
2005-01-08 13:43 ` Hugh Dickins
2005-01-09 11:35 ` Marcelo Tosatti
2005-01-09 18:16 ` Nikita Danilov
2005-01-25 16:39 ` reiser4 core patches: [Was: [RFC] per thread page reservation patch] Vladimir Saveliev
2005-01-27 10:37 ` Adrian Bunk
2005-01-27 11:01 ` Christoph Hellwig
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