Re: Direct io on block device has performance regression on 2.6.x kernel - fix sync I/O path

From: Christoph Hellwig
Date: Tue Mar 08 2005 - 21:26:14 EST

> --- linux-2.6.9/drivers/char/raw.c 2004-10-18 14:54:37.000000000 -0700
> +++ linux-2.6.9.ken/drivers/char/raw.c 2005-03-08 17:22:07.000000000 -0800

this is not the blockdevice, but the obsolete raw device driver. Please
benchmark and if nessecary fix the blockdevice O_DIRECT codepath insted
as the raw driver is slowly going away.

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