From: Ingo Molnar <mingo@elte.hu>
To: Ryan Cumming <ryan@spitfire.gotdns.org>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [patch] ioport-cache-2.6.8.1.patch
Date: Tue, 24 Aug 2004 22:20:42 +0200 [thread overview]
Message-ID: <20040824202042.GA4712@elte.hu> (raw)
In-Reply-To: <200408241238.29702.ryan@spitfire.gotdns.org>
* Ryan Cumming <ryan@spitfire.gotdns.org> wrote:
> On Tuesday 24 August 2004 00:19, you wrote:
> > + if (likely(next == tss->io_bitmap_owner)) {
>
> Probably a stupid question, but what's stopping the tss->io_bitmap_owner from being killed, and then a new
> thread_struct being kmalloc()'ed in the exact same place as the old one? I realize it's highly unlikely, I'm just
> wondering if it's possible at all.
>
> I guess clearing tss->io_bitmap_owner whenever we kfree() the bitmap owner's thread_struct would plug that up.
the patch flushes the ->io_bitmap_owner info on thread exit.
Ingo
next prev parent reply other threads:[~2004-08-24 20:19 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-23 21:23 [patch] lazy TSS's I/O bitmap copy Davide Libenzi
2004-08-23 21:32 ` Andi Kleen
2004-08-23 21:39 ` Davide Libenzi
2004-08-23 22:07 ` Linus Torvalds
2004-08-23 22:18 ` Davide Libenzi
2004-08-23 22:27 ` Linus Torvalds
2004-08-28 19:15 ` Alan Cox
2004-08-23 22:54 ` Davide Libenzi
2004-08-23 23:09 ` Linus Torvalds
2004-08-23 23:33 ` Davide Libenzi
2004-08-24 7:19 ` [patch] ioport-cache-2.6.8.1.patch Ingo Molnar
2004-08-24 15:15 ` Davide Libenzi
2004-08-24 19:38 ` Ryan Cumming
2004-08-24 20:20 ` Ingo Molnar [this message]
2004-08-24 1:53 ` [patch] lazy TSS's I/O bitmap copy Brian Gerst
2004-08-24 2:17 ` Linus Torvalds
2004-08-24 4:30 ` Davide Libenzi
2004-08-24 6:51 ` Arjan van de Ven
2004-08-24 15:13 ` Davide Libenzi
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