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Date: Fri, 28 May 2010 21:06:57 -0400 From: tytso@....edu To: "Jayson R. King" <dev@...sonking.com> Cc: Stable team <stable@...nel.org>, LKML <linux-kernel@...r.kernel.org>, Greg Kroah-Hartman <gregkh@...e.de>, "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>, Dave Chinner <david@...morbit.com>, Ext4 Developers List <linux-ext4@...r.kernel.org>, Kay Diederichs <Kay.Diederichs@...-konstanz.de> Subject: Re: [PATCH 2.6.27.y 2/3] ext4: Fix file fragmentation during large file write. On Fri, May 28, 2010 at 02:26:57PM -0500, Jayson R. King wrote: > From: Aneesh Kumar K.V <aneesh.kumar@...ux.vnet.ibm.com> > Date: Thu Oct 16 10:10:36 2008 -0400 > Subject: ext4: Fix file fragmentation during large file write. > > commit 22208dedbd7626e5fc4339c417f8d24cc21f79d7 upstream. > > The range_cyclic writeback mode uses the address_space writeback_index > as the start index for writeback. With delayed allocation we were > updating writeback_index wrongly resulting in highly fragmented file. > This patch reduces the number of extents reduced from 4000 to 27 for a > 3GB file. This isn't a critical bug fix either. I don't really care a whole lot, since I don't plan to support ext4 with all of these patches but if you haven't been doing a full set of testing with these patches, I'd be very concerned about whether ext4 would be stable after applying this patch series. What sort of testing _have_ you done? - Ted -- 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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