Re: [dm-devel] Re: Ext3 sequential read performance drop 2.6.29 ->2.6.30,2.6.31,...
From: Christoph Hellwig
Date: Tue Nov 03 2009 - 05:06:57 EST
On Mon, Nov 02, 2009 at 01:55:54PM -0800, Andrew Morton wrote:
> On Tue, 13 Oct 2009 12:09:55 +0200
> Laurent CORBES <laurent.corbes@xxxxxxxxxxxx> wrote:
> > Hi all,
> > While benchmarking some systems I discover a big sequential read performance
> > drop using ext3 on ~ big files. The drop seems to be introduced in 2.6.30. I'm
> > testing with 18.104.22.168 -> 22.214.171.124 -> 126.96.36.199 -> 188.8.131.52.
> Seems that large performance regressions aren't of interest to this
> list :(
No sure which list you mean, but dm-devel is for dm, not md. We're also
seeing similarly massive performance drops with md and ext3/xfs as
already reported on the list. Someone tracked it down to writeback
changes as usual, but there it got stuck.
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/