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Date: Fri, 28 Sep 2007 02:20:28 -0700 From: "Chakri n" <chakriin5@...il.com> To: "Peter Zijlstra" <a.p.zijlstra@...llo.nl> Cc: "Andrew Morton" <akpm@...ux-foundation.org>, linux-pm <linux-pm@...ts.linux-foundation.org>, lkml <linux-kernel@...r.kernel.org>, nfs@...ts.sourceforge.net Subject: Re: A unresponsive file system can hang all I/O in the system on linux-2.6.23-rc6 (dirty_thresh problem?) It's 2.6.23-rc6. Thanks --Chakri On 9/28/07, Peter Zijlstra <a.p.zijlstra@...llo.nl> wrote: > On Fri, 2007-09-28 at 02:01 -0700, Chakri n wrote: > > Thanks for explaining the adaptive logic. > > > > > However other devices will at that moment try to maintain a limit of 0, > > > which ends up being similar to a sync mount. > > > > > > So they'll not get stuck, but they will be slow. > > > > > > > > > > Sync should be ok, when the situation is bad like this and some one > > hijacked all the buffers. > > > > But, I see my simple dd to write 10blocks on local disk never > > completes even after 10 minutes. > > > > [root@h46 ~]# dd if=/dev/zero of=/tmp/x count=10 > > > > I think the process is completely stuck and is not progressing at all. > > > > Is something going wrong in the calculations where it does not fall > > back to sync mode. > > What kernel is that? > > > - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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