From: Stephen Tweedie <sct@redhat.com>
To: BenHanokh Gabriel <gabriel@SANgate.com>
Cc: linux-mm@kvack.org
Subject: Re: mix-block size for raw_io ??
Date: Thu, 12 Oct 2000 19:06:32 +0100 [thread overview]
Message-ID: <20001012190632.E3189@redhat.com> (raw)
In-Reply-To: <39E5E469.2020304@SANgate.com>; from gabriel@SANgate.com on Thu, Oct 12, 2000 at 07:18:49PM +0300
Hi,
On Thu, Oct 12, 2000 at 07:18:49PM +0300, BenHanokh Gabriel wrote:
>
> i saw that the raw interface is using 1/2K blocks for io.
> i understand that raw_io needs to support disk accesses in sector
> resolution, but why is it not possible to mix block sizes for the same
> device
It is possible in principle, but I can't guarantee that every device
driver will work properly if you do this.
> is there any reason why we don't use mix-block-size ?
Because it would be a short-term hack --- the real solution to this
problem is to push kiobufs right down into the block device request
layer. SGI have already got patches to do this, with support in the
scsi and ide drivers.
Cheers,
Stephen
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prev parent reply other threads:[~2000-10-12 18:06 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-10-12 16:18 BenHanokh Gabriel
2000-10-12 18:06 ` Stephen Tweedie [this message]
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