From: Jens Axboe <jens.axboe@oracle.com>
To: Andrew Morton <akpm@osdl.org>
Cc: linux-kernel@vger.kernel.org, Linus Torvalds <torvalds@osdl.org>
Subject: Re: performance regression from block merge
Date: Thu, 21 Dec 2006 20:35:50 +0100 [thread overview]
Message-ID: <20061221193549.GF17199@kernel.dk> (raw)
In-Reply-To: <20061221112540.e4ba58bc.akpm@osdl.org>
On Thu, Dec 21 2006, Andrew Morton wrote:
>
> Jens, elapsed time for `mke2fs /dev/hdc5' with the anticipatory scheduler
> (at least) has gone from nine seconds to sixty as a result of the recent
> block merge.
About when? I'll double check and test here, I'm assuming you mean since
2.6.19?
> This is the enty enth time that block code has been slammed into mainline
> without having had exposure to -mm testers or even to me personally, and it
> it the second time (at least) that obvious regressions have occurred as a
> result. I have a New Year's resolution for you ;)
I usually try and make sure that for-akpm is the same as for-linus, so
if you pull that then it'll go to -mm as well. Sometimes the window
isn't that big, I'll try and make sure it's seen at least one -mm before
going upstream.
--
Jens Axboe
next prev parent reply other threads:[~2006-12-21 19:33 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-21 19:25 performance regression from block merge Andrew Morton
2006-12-21 19:35 ` Jens Axboe [this message]
2006-12-21 19:47 ` Jens Axboe
2006-12-21 20:14 ` Andrew Morton
2006-12-21 20:18 ` Jens Axboe
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