Re: [GIT PATCH] another tranche of SCSI updates for 2.6.26

Boaz Harrosh
2008-04-28T14:48:04Z

On Mon, Apr 28 2008 at 15:13 +0300, James Bottomley <James.Bottomley@HansenPartnership.com> wrote:
> On Mon, 2008-04-28 at 10:23 +0300, Boaz Harrosh wrote:
>> If we are already on the subject. It looks like we always have at most 1 command in the
>> free list, so why the free list at all? or am I reading the code wrong?
>
> Because list handlers are well understood mechanisms within the kernel.
This is not an excuse ;-). So is a simple pointer.

> Also because in low memory situations, one command per host is
> sufficient to guarantee forward progress, but it's not going to be very
> efficient. Embedded and other low memory environments can increase the
> size of the free list to improve their I/O path.
>

Ok that is what I thought, but inspecting the code, I can't find it. Is there
a config option or an external mechanism that let you do that? If not, is/was
there a ready made external patch that will enable such facility in someway?
Should there be one?

> James
>

Boaz