linux-kernel - Re: [PATCH 1/2] vmscan: shrink_slab() require number of lru

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:	Tue, 29 Jun 2010 10:19:37 -0500 (CDT)
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	Minchan Kim <minchan.kim@...il.com>
cc:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Mel Gorman <mel@....ul.ie>, Rik van Riel <riel@...hat.com>,
	Johannes Weiner <hannes@...xchg.org>
Subject: Re: [PATCH 1/2] vmscan: shrink_slab() require number of lru_pages,
  not page order

On Sun, 27 Jun 2010, Minchan Kim wrote:

> > What does the "lru_pages" parameter do in shrink_slab()? Looks
> > like its only role is as a divison factor in a complex calculation of
> > pages to be scanned.
>
> Yes. But I think it can make others confuse like this.

Right.

> Except zone_reclaim, lru_pages had been used for balancing slab
> reclaim VS page reclaim.
> So lru_page naming is a good.

It is also good to make zone reclaim more deterministic by using the new
counters. So I am not all opposed to the initial patch. Just clear things
up a bit and make sure that this does not cause regressions because of too
frequent calls to shrink_slab

> So you intentionally passed order instead of the number of lru pages
> for shrinking many slabs as possible as.

Dont remember doing that. I suspect the parameter was renamed at some
point.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/