linux-kernel - Re: [RFC 4/9] Atomic reclaim: Save irq flags in vmscan.c

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

Message-ID: <Pine.LNX.4.64.0708141414260.31693@schroedinger.engr.sgi.com>
Date:	Tue, 14 Aug 2007 14:15:12 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Andi Kleen <andi@...stfloor.org>
cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC 4/9] Atomic reclaim: Save irq flags in vmscan.c

On Tue, 14 Aug 2007, Andi Kleen wrote:

> > Hmmmm... The spinlock is its own flag.
> 
> Yes, but it's not CPU local. Taking the spinlock from another CPU's
> interrupt handler is perfectly safe, just not from the local CPU.
> If you use the spinlock as flag you would need to lock out everybody.

So every spinlock would have an array of chars sized to NR_CPUS and set 
the flag when the lock is taken?

-
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/