From: Minchan Kim <minchan.kim@gmail.com>
To: Nick Piggin <npiggin@suse.de>
Cc: Steven Whitehouse <swhiteho@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org
Subject: Re: [patch] mm: vmap area cache
Date: Mon, 31 May 2010 22:21:59 +0900 [thread overview]
Message-ID: <20100531132159.GA3555@barrios-desktop> (raw)
In-Reply-To: <20100531080757.GE9453@laptop>
On Mon, May 31, 2010 at 06:07:57PM +1000, Nick Piggin wrote:
> Hi Andrew,
>
> Could you put this in your tree? It could do with a bit more testing. I
> will update you with updates or results from Steven.
>
> Thanks,
> Nick
> --
>
> Provide a free area cache for the vmalloc virtual address allocator, based
> on the approach taken in the user virtual memory allocator.
>
> This reduces the number of rbtree operations and linear traversals over
> the vmap extents to find a free area. The lazy vmap flushing makes this problem
> worse because because freed but not yet flushed vmaps tend to build up in
> the address space between flushes.
>
> Steven noticed a performance problem with GFS2. Results are as follows...
>
Reviewed-by: Minchan Kim <minchan.kim@gmail.com>
--
Kind regards,
Minchan Kim
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next prev parent reply other threads:[~2010-05-31 13:22 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-31 8:07 [patch] mm: vmap area cache Nick Piggin
2010-05-31 13:21 ` Minchan Kim [this message]
2010-06-02 21:49 ` Andrew Morton
2010-06-03 13:55 ` Nick Piggin
2010-06-25 13:00 ` Steven Whitehouse
2010-06-26 8:31 ` Nick Piggin
2010-06-28 8:37 ` Steven Whitehouse
2010-06-28 8:45 ` Nick Piggin
2010-06-28 9:05 ` Steven Whitehouse
2010-06-30 23:26 ` Andrew Morton
2010-07-01 7:50 ` Nick Piggin
2010-07-01 8:49 ` Steven Whitehouse
2010-07-01 9:02 ` Nick Piggin
2010-07-14 8:55 ` Steven Whitehouse
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