Re: [PATCH 1/2] revert sg segment size ifdefs

[Jens Axboe <jens.axboe@oracle.com>]

On Mon, Sep 03 2007, FUJITA Tomonori wrote:
> The patchset is against Jens' sg chaining branch.
> 
> Jens removed old SCSI_MAX_PHYS_SEGMENTS hack and the maximum is always
> 128:
> 
> http://git.kernel.org/?p=linux/kernel/git/axboe/linux-2.6-block.git;a=commit;h=d6beb57f48231f5c012fb7d55b369bc0af6b0c41
> 
> I talked to James at linuxconf.eu and he likes to provide a way to
> reduce sgpool memory consumption because with libata everyone
> (including small machines) uses the mid layer.
> 
> This patch reverts sg segment size ifdefs that the current mid layer
> has. Later we might do something better like relating
> SCSI_MAX_SG_SEGMENTS with other config options like CONFIG_EMBEDDED or
> just having SCSI_MAX_SG_SEGMENTS in menuconfig.
> 
> Now we have sg chaining code in -mm. As discussed before, it would be
> nice to test sg chaining code in -mm with a small SCSI_MAX_SG_SEGMENTS
> value like 32.

I'd rather avoid this, but it's not a big deal. I'll add it.

-- 
Jens Axboe