From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Anton Blanchard <anton@samba.org>
Cc: linuxppc-dev@ozlabs.org
Subject: Re: [patch 1/3] powerpc: Move 64bit VDSO to improve context switch performance
Date: Tue, 14 Jul 2009 17:07:13 +1000 [thread overview]
Message-ID: <1247555233.29462.86.camel@pasglop> (raw)
In-Reply-To: <20090714065425.301516312@samba.org>
On Tue, 2009-07-14 at 16:53 +1000, Anton Blanchard wrote:
> plain text document attachment (move_vdso_v2)
> On 64bit applications the VDSO is the only thing in segment 0. Since the VDSO
> is position independent we can remove the hint and let get_unmapped_area pick
> an area. This will mean the vdso will be near other mmaps and will share
> an SLB entry:
Don't we lose randomization ? Or do we randomize the whole mem map
nowadays ?
Cheers,
Ben.
next prev parent reply other threads:[~2009-07-14 7:07 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-14 6:53 [patch 0/3] PowerPC context switch optimisations Anton Blanchard
2009-07-14 6:53 ` [patch 1/3] powerpc: Move 64bit VDSO to improve context switch performance Anton Blanchard
2009-07-14 7:07 ` Benjamin Herrenschmidt [this message]
2009-07-14 7:38 ` Anton Blanchard
2009-10-02 19:14 ` Andreas Schwab
[not found] ` <m2ocophale.fsf__34527.2158309401$1254511503$gmane$org@igel.home>
2009-10-03 14:15 ` Andreas Schwab
2009-10-03 14:51 ` Andreas Schwab
2009-10-03 21:53 ` Benjamin Herrenschmidt
2009-10-04 12:35 ` Andreas Schwab
2009-07-14 6:53 ` [patch 2/3] powerpc: Rearrange SLB preload code Anton Blanchard
2009-07-14 6:53 ` [patch 3/3] powerpc: Preload application text segment instead of TASK_UNMAPPED_BASE Anton Blanchard
2009-07-14 7:10 ` Benjamin Herrenschmidt
2009-07-14 7:27 ` Anton Blanchard
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