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Date: Fri, 2 Jan 2009 20:20:58 +0100 From: Ingo Molnar <mingo@...e.hu> To: Ravikiran G Thirumalai <kiran@...lex86.org> Cc: linux-kernel@...r.kernel.org, travis@....com, stable@...nel.org, shai@...lex86.org Subject: Re: [patch] x86: Fix incorrect __read_mostly on _boot_cpu_pda * Ravikiran G Thirumalai <kiran@...lex86.org> wrote: > On Fri, Jan 02, 2009 at 05:09:51PM +0100, Ingo Molnar wrote: > > > >* Ravikiran G Thirumalai <kiran@...lex86.org> wrote: > > > >> The pda rework (commit 3461b0af025251bbc6b3d56c821c6ac2de6f7209) > >> to remove static boot cpu pdas introduced a bug. _boot_cpu_pda is the > >> actual pda used by the boot cpu and is definitely not "__read_mostly" and > >> ended up polluting the read mostly section with writes. This bug caused > >> regression of about 8-10% on certain syscall intensive workloads. > >> > >> Signed-off-by: Ravikiran Thirumalai <kiran@...lex86.org> > > > >applied to tip/x86/urgent, with a Cc: stable tag. Thanks, > > > > Thanks! > > Stable maintainers, please consider this for 2.6.27 stable as well (in > addition to 28). (Attaching the tip/x86/urgent commit as reference to > the patch) i have added a -stable tag to the commit - please only put it into -stable once it hits Linus's tree. (in the next couple of days) > Ingo -- 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/
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