Re: ll_rw_block/submit_bh and request limits

From: Marcelo Tosatti (
Date: Thu Feb 22 2001 - 16:44:11 EST

On Thu, 22 Feb 2001, Andrea Arcangeli wrote:


> However if you have houndred of different queues doing I/O at the same
> time it may make a difference, but probably with tons of harddisks
> you'll also have tons of ram... In theory we could put a global limit
> on top of the the per-queue one. Or we could at least upper bound the
> total_ram / 3.

The global limit on top of the per-queue limit sounds good.

Since you're talking about the "total_ram / 3" hardcoded value... it
should be /proc tunable IMO. (Andi Kleen already suggested this)

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This archive was generated by hypermail 2b29 : Fri Feb 23 2001 - 21:00:29 EST