From: Andrew Morton <akpm@zip.com.au>
To: James Stevenson <mistral@stev.org>
Cc: Roy Sigurd Karlsbakk <roy@karlsbakk.net>, linux-kernel@vger.kernel.org
Subject: Re: temporarily system freeze with high I/O write to ext2 fs
Date: Thu, 06 Dec 2001 16:01:07 -0800 [thread overview]
Message-ID: <3C1006C3.895EEE9F@zip.com.au> (raw)
In-Reply-To: <Pine.LNX.4.30.0112061458360.15516-100000@mustard.heime.net> <3C0FD78D.F567ECBD@zip.com.au> <00e601c17eb0$25e20d80$0801a8c0@Stev.org>
James Stevenson wrote:
>
> > > why is it that Linux 'hangs' while doing heavy I/O operations (such as
> dd)
> > > to (and perhaps from?) ext2 file systems? I can't see the same behaivour
> > > when using other file systems, such as ReiserFS
> > >
> >
> > A partial fix for this went into 2.4.17-pre2. What kernel are you
> > using?
>
> i have always had with problem normally during disk writes.
> currently on 2.4.x-14 + 2.4.16
Please try 2.4.17-pre2 or later.
> > For how long does it "hang"? What exactly are you doing when it
> > occurs?
>
> its not that it hangs but it gets extremely laggy eg 2/3 seconds pause
> for keyboard input to appear on a console.
Your app got paged out, and the enormous read latencies in 2.4.16
caused it to remain there.
next prev parent reply other threads:[~2001-12-07 0:02 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-12-06 14:03 temporarily system freeze with high I/O write to ext2 fs Roy Sigurd Karlsbakk
2001-12-06 20:39 ` Andrew Morton
2001-12-06 23:45 ` James Stevenson
2001-12-07 0:01 ` Andrew Morton [this message]
2001-12-07 9:47 ` James Stevenson
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