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Date: Fri, 24 Apr 2009 08:15:18 +0200 From: Jens Axboe <jens.axboe@...cle.com> To: Nikanth Karthikesan <knikanth@...e.de> Cc: Andrew Morton <akpm@...ux-foundation.org>, dwmw2@...radead.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH linux-2.6-block/for-linus] Fix discard requests accounting in the diskstats On Fri, Apr 24 2009, Nikanth Karthikesan wrote: > When 2 discard requests are merged, the stats gets updated, but we do not > update statistics normally when a discard request is issued or completed. For > example the in_flight counter would be decremented when 2 discard requests are > merged, but it was not at all incremented when they were issued, and in_flight > counter will not be decremented, when they are completed as well. > > This patch fixes this by adding discard requests to the statistics. > > Signed-off-by: Nikanth Karthikesan <knikanth@...e.de> OK, so that's not quite what I had in mind. If we first do this as a preparatory patch: http://git.kernel.dk/?p=linux-2.6-block.git;a=commit;h=42fd769da4edadad83a779867ff1910ec35c6de7 then the discard fix becomes this one-liner: http://git.kernel.dk/?p=linux-2.6-block.git;a=commit;h=999ae79ae7f853bb9e60e95753ebf8d1628e632a -- 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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