From: mcatos@ics.forth.gr
To: linux-kernel@vger.kernel.org
Subject: Request merging not doing well
Date: Wed, 13 Jun 2007 14:56:30 +0300 [thread overview]
Message-ID: <1181735790.466fdb6e87626@webmail.ics.forth.gr> (raw)
I did some tests to see how requet merging works. Using a dummy ramdisk block
device, I did 'dd count=100 bs=4096 if=/dev/zero of=/dev/foo' (using the
anticipatory scheduler) and in the request function I got 10 requests:
req 1, sector 0, 8 sectors
req 2, sector 8, 8 sectors
.
.
.
req 10, sector 72, 8 sectors
Shouldn'y these requests be merged? Queue default values are: 255 max sectors,
128 max requests.
Thanx.
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