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Date: Thu, 18 Jan 2007 10:46:53 +1100 From: Jens Axboe <jens.axboe@...cle.com> To: Dave Kleikamp <shaggy@...ux.vnet.ibm.com> Cc: JFS Discussion <jfs-discussion@...ts.sourceforge.net>, fsdevel <linux-fsdevel@...r.kernel.org>, linux-kernel <linux-kernel@...r.kernel.org>, Nick Piggin <nickpiggin@...oo.com.au> Subject: Re: [PATCH: 2.6.20-rc4-mm1] JFS: Avoid deadlock introduced by explicit I/O plugging On Wed, Jan 17 2007, Dave Kleikamp wrote: > On Thu, 2007-01-18 at 10:18 +1100, Jens Axboe wrote: > > > Can you try io_schedule() and verify that things just work? > > I actually did do that in the first place, but wondered if it was the > right thing to introduce the accounting changes that came with that. > I'll change it back to io_schedule() and test it again, just to make > sure. It appears to be the correct change to me - you really are waiting for IO resources (otherwise it would not hang with the plug change), so doing an inc/dec of iowait around the schedule should be done. > If that's the right fix, I can push it directly since it won't have any > dependencies on your patches. Perfect! -- Jens Axboe - 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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