linux-kernel - Re: [RFC/PATCH] slab: free pages in a batch in drain

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <Pine.LNX.4.64.0702221500420.22546@schroedinger.engr.sgi.com>
Date:	Thu, 22 Feb 2007 15:01:30 -0800 (PST)
From:	Christoph Lameter <clameter@...r.sgi.com>
To:	Pekka J Enberg <penberg@...helsinki.fi>,
	Pekka Enberg <penberg@...helsinki.fi>
cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	wli@...omorphy.com
Subject: Re: [RFC/PATCH] slab: free pages in a batch in drain_freelist

On Thu, 22 Feb 2007, Pekka J Enberg wrote:

> As suggested by William, free the actual pages in a batch so that we
> don't keep pounding on l3->list_lock.

This means holding the l3->list_lock for a prolonged time period. The 
existing code was done this way in order to make sure that the interrupt 
holdoffs are minimal.

There is no pounding. The cacheline with the list_lock is typically held 
until the draining is complete. While we drain the freelist we need to be 
able to respond to interrupts.

-
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/