DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws;
  s=s1024; d=yahoo.com;
  h=Message-ID:Received:Date:From:Subject:To:Cc:In-Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding;
  b=JromwVJla0PtNT+FvBswCrO8+TlC3zPykpZpr1Wd+Rsejb9ZLpAYwQNHl/bNi5mOcnvYe7vQ15SZbuuc6w0ZhvJm36Nhdck+h366BQDZVEq3Gh504Kn5SxMyv1UtZMafcMMFVXkCgSUH+ChfZIHUDKUl7MnG+HPxi/zvZvkyC9U=  ;
Message-ID: <20051116223937.28115.qmail@web34112.mail.mud.yahoo.com>
Date: Wed, 16 Nov 2005 14:39:37 -0800 (PST)
From: Kenny Simpson <theonetruekenny@yahoo.com>
Subject: Re: mmap over nfs leads to excessive system load
To: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: Andrew Morton <akpm@osdl.org>, linux-kernel@vger.kernel.org
In-Reply-To: <1132178234.8811.64.camel@lade.trondhjem.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7BIT
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 885
Lines: 29

--- Trond Myklebust <trond.myklebust@fys.uio.no> wrote:
> I'm getting lost here. Please could you spell out the testcases that are
> not working.

I've redone my test cases and have confirmed that O_DIRECT with pwrite64 triggers the bad
condition.

The cases that are fine are:
  pwrite64
  ftruncate with O_DIRECT
  ftruncate

Also, when the system is in this state, if I try to 'ls' the file,
the 'ls' process becomes stuck in state D in sync_page.  stracing the 'ls'
shows it is in a call to stat64.

-Kenny


__________________________________ 
Yahoo! FareChase: Search multiple travel sites in one click.
http://farechase.yahoo.com
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/