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From: Joe Thornber <thornber@redhat.com>
To: Mikulas Patocka <mpatocka@redhat.com>
Cc: dm-devel@redhat.com, "Alasdair G. Kergon" <agk@redhat.com>
Subject: Re: [PATCHES] convert dm-thin to use dm-bufio
Date: Wed, 17 Aug 2011 09:26:57 +0100	[thread overview]
Message-ID: <20110817082656.GA3267@ubuntu> (raw)
In-Reply-To: <Pine.LNX.4.64.1108161755510.15859@hs20-bc2-1.build.redhat.com>

On Tue, Aug 16, 2011 at 06:03:00PM -0400, Mikulas Patocka wrote:
> The working set is 2% of memory or 1/4 of vmalloc space (whichever is 
> smaller). This can be changed in 
> "/sys/module/dm_bufio/parameters/dm_bufio_cache_size".
> 
> Buffers are freed when they are unused for 60 seconds (can be changed in 
> "/sys/module/dm_bufio/parameters/dm_bufio_max_age").
> 
> Total size is divided by the number of active clients using dm-bufio. So 
> that each client gets a fair share.
> 
> Writeback is done on commit. When 3/4 of the cache size is used, 
> background writeback is started.

This all sounds good; get the locking interface in and I'll switch to
bufio straight away.

- Joe

  reply	other threads:[~2011-08-17  8:26 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-08-14 20:18 [PATCHES] convert dm-thin to use dm-bufio Mikulas Patocka
2011-08-15  9:04 ` Joe Thornber
2011-08-15 18:26   ` Mikulas Patocka
2011-08-16  9:16     ` Joe Thornber
2011-08-16 22:03       ` Mikulas Patocka
2011-08-17  8:26         ` Joe Thornber [this message]
2011-08-18 22:31           ` Mikulas Patocka
2011-08-19  7:04             ` Mike Snitzer
2011-08-19  9:11               ` Joe Thornber
2011-08-19  9:46                 ` Mike Snitzer
2011-08-19 10:17                   ` Mike Snitzer
2011-08-19 10:22                   ` Joe Thornber
2011-08-19 13:49                     ` Mike Snitzer
2011-08-19 14:11                       ` Alasdair G Kergon
2011-08-19 13:31               ` Mikulas Patocka
2011-08-19 14:11                 ` Mike Snitzer
2011-08-19 15:37                 ` Joe Thornber
2011-08-19 18:25                   ` Mike Snitzer
2011-08-19 18:50                     ` Alasdair G Kergon
2011-08-19  9:12             ` [PATCHES] " Joe Thornber
2011-08-19 16:17               ` Joe Thornber
2011-08-20  1:10                 ` [PATCH 1/2] dm bufio: fix "value computed is not used" warnings Mike Snitzer
2011-08-20  1:10                   ` [PATCH 2/2] dm space map: only include bitops.h in dm-space-map-common.c Mike Snitzer
2011-08-22 13:29                   ` [PATCH 1/2] dm bufio: fix "value computed is not used" warnings Mikulas Patocka
2011-08-22 18:24                 ` [PATCHES] convert dm-thin to use dm-bufio Mikulas Patocka
2011-08-22 19:59                   ` Mikulas Patocka
2011-08-23 11:23                     ` Joe Thornber

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