Re: [PATCH] speed up SATA
From: Jeff Garzik
Date: Sun Mar 28 2004 - 23:59:11 EST
Andrea Arcangeli wrote:
is beneficial at all, and your bootup log showing 32M is all but
exciting, I'd be a lot more excited to see 512k there.
Just to clarify... 32MB would never ever be reached. The S/G table
limit means requests are limited to 8MB. VM thresholds and user
application use further limit request size.
I think Andrew's point is actually more relevant than examining the size
of a single request:
the effect of really big requests will be the same
as the effect of permitting _more_ requests.
Thus like the "1,000 disks" example, memory management needs to make
sure that an "unreasonable" amount of memory is not being pinned.
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