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Re: kupdate weirdness
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From:
Andrew Morton <akpm@...>
To: Miklos Szeredi <miklos@...>
Cc: <linux-kernel@...>, <linux-fsdevel@...>
Subject:
Re: kupdate weirdness
Date: Wednesday, August 1, 2007 - 5:14 pm
On Wed, 01 Aug 2007 22:45:16 +0200 Miklos Szeredi <miklos@szeredi.hu> wrote:
quoted text
> The following strange behavior can be observed: > > 1. large file is written > 2. after 30 seconds, nr_dirty goes down by 1024 > 3. then for some time (< 30 sec) nothing happens (disk idle) > 4. then nr_dirty again goes down by 1024 > 5. repeat from 3. until whole file is written > > So basically a 4Mbyte chunk of the file is written every 30 seconds. > I'm quite sure this is not the intended behavior. > > The reason seems to be that __sync_single_inode() will move the > partially written inode from s_io onto s_dirty, and sync_sb_inode() > will not splice it back onto s_io until the rest of the inodes on s_io > has been processed.
It does all sorts of weird crap.
quoted text
> Since there will probably be a recently dirtied inode on s_io, this > will take some of time, but always less than 30 sec. > > I don't know what's the easiest solution. > > Any ideas?
Try 2.6.23-rc1-mm2. -
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Messages in current thread:
kupdate weirdness
, Miklos Szeredi
, (Wed Aug 1, 4:45 pm)
Re: kupdate weirdness
, David Chinner
, (Wed Aug 1, 9:53 pm)
Re: kupdate weirdness
, Andrew Morton
, (Wed Aug 1, 5:14 pm)
Re: kupdate weirdness
, Miklos Szeredi
, (Thu Aug 2, 11:52 am)
Re: kupdate weirdness
, Andrew Morton
, (Thu Aug 2, 3:18 pm)
Re: kupdate weirdness
, Miklos Szeredi
, (Thu Aug 2, 3:35 pm)
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