request merge changes?

From: Jens Axboe (axboe@suse.de)
Date: Mon Jan 24 2000 - 19:40:05 EST

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Hi,

I just ported a project from 2.3.26 to 2.3.39 and I'm witnessing
a strange request effect. Doing

dd if=/dev/zero of=/dev/cdrw bs=2048 count=32

I was relieing on the ll_rw_block layer to correctly handle
request merging and this was fine in 2.3.26. I would receive
a single clustered request. In 2.3.39 I actually get two requests,
one with the first block and a second with the remaining merged.

Surely this isn't the intended effect. Comments?

-- * Jens Axboe <axboe@suse.de> * Linux CD-ROM Maintainer * http://www.kernel.dk

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