From: Denis Vlasenko <vda@ilport.com.ua>
To: Pavel Machek <pavel@suse.cz>
Cc: Chris Mason <mason@suse.com>, Hans Reiser <reiser@namesys.com>,
linux-kernel@vger.kernel.org,
Reiserfs developers mail-list <Reiserfs-Dev@namesys.com>
Subject: Re: Recursive chmod/chown OOM kills box with 32MB RAM
Date: Thu, 2 Feb 2006 17:17:04 +0200 [thread overview]
Message-ID: <200602021717.04429.vda@ilport.com.ua> (raw)
In-Reply-To: <20060121232008.GA2697@ucw.cz>
On Sunday 22 January 2006 01:20, Pavel Machek wrote:
> > In the case of reiserfs, it might pin as much as the size of the journal at
> > any time. The default journal is 32MB, which is much too large for a system
> > with only 32MB of ram.
> >
> > You can shrink the log of an existing filesystem. The minimum size is 513
> > blocks, you might try 1024 as a good starting poing.
> >
> > reiserfstune -s 1024 /dev/xxxx
> >
> > The filesystem must be unmounted first.
>
> Could we refuse to mount filesystem unless journal_size <
> physmem_size/2 or something like that?
>
> I was not aware of this trap, and it seems unlikely that users know
> about it...
Maybe reiserfs code should use journal of reduced size on lowmem boxes.
Basically "reiserfstune -s 1024 /dev/xxxx" on-the-fly.
--
vda
next prev parent reply other threads:[~2006-02-02 15:17 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-28 14:13 Recursive chmod/chown OOM kills box with 32MB RAM Denis Vlasenko
2006-01-28 15:01 ` Denis Vlasenko
2006-01-28 16:11 ` Denis Vlasenko
2006-01-30 6:11 ` Hans Reiser
2006-01-30 12:28 ` Denis Vlasenko
2006-02-01 15:21 ` Bernd Eckenfels
2006-02-03 6:21 ` Denis Vlasenko
2006-01-30 13:22 ` Chris Mason
2006-01-21 23:20 ` Pavel Machek
2006-02-02 15:17 ` Denis Vlasenko [this message]
2006-02-02 19:34 ` Bill Davidsen
2006-02-01 7:32 ` Denis Vlasenko
2006-02-01 7:42 ` Hans Reiser
2006-02-02 19:26 ` Bill Davidsen
2006-02-01 7:42 ` Denis Vlasenko
2006-02-01 10:15 ` Denis Vlasenko
2006-02-01 11:45 ` Vitaly Fertman
2006-02-01 14:25 ` Denis Vlasenko
2006-02-01 14:59 ` Denis Vlasenko
2006-02-01 11:52 ` Edward Shishkin
2006-02-01 14:26 ` Denis Vlasenko
2006-02-01 14:57 ` Denis Vlasenko
2006-02-01 15:14 ` Bernd Eckenfels
2006-02-01 15:28 ` Denis Vlasenko
2006-02-02 7:25 ` Denis Vlasenko
2006-02-02 9:42 ` Vitaly Fertman
2006-02-02 11:52 ` Denis Vlasenko
2006-02-02 19:32 ` Bill Davidsen
2006-02-03 5:57 ` Denis Vlasenko
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