linux-kernel - Re: [PATCH 19/22] 2.6.22-rc3 perfmon2 : modified x86

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Message-ID: <20070531142607.GI22798@frankl.hpl.hp.com>
Date:	Thu, 31 May 2007 07:26:07 -0700
From:	Stephane Eranian <eranian@....hp.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 19/22] 2.6.22-rc3 perfmon2 : modified x86_64 files

Andi,

On Thu, May 31, 2007 at 04:20:38PM +0200, Andi Kleen wrote:
> 
> > > Just use a cpu notifier instead. No need to add everybody's per cpu init code here.
> > 
> > The code must run on the CPU that is being initialized.
> 
> smp_call_function_single() 
> 
Isn't that more complicated than just adding a hook in cpu_disable()?

> > > 
> > > No compat syscalls? 
> > > 
> > compat syscalls for what? I need to ensure backward compatiblity on IA-64 only.
> 
> For 32bit / i386 code.

I's there in ia32entry.S. Was it missing from the E-mail?

In anycase, here it is:

diff --exclude=.git -urp linux-2.6.22.base/arch/x86_64/ia32/ia32entry.S linux-2.6.22/arch/x86_64/ia32/ia32entry.S
--- linux-2.6.22.base/arch/x86_64/ia32/ia32entry.S      2007-05-29 03:17:16.000000000 -0700
+++ linux-2.6.22/arch/x86_64/ia32/ia32entry.S   2007-05-29 03:24:14.000000000 -0700
@@ -719,4 +719,16 @@ ia32_sys_call_table:
        .quad compat_sys_signalfd
        .quad compat_sys_timerfd
        .quad sys_eventfd
+       .quad sys_pfm_create_context
+       .quad sys_pfm_write_pmcs
+       .quad sys_pfm_write_pmds
+       .quad sys_pfm_read_pmds
+       .quad sys_pfm_load_context
+       .quad sys_pfm_start
+       .quad sys_pfm_stop
+       .quad sys_pfm_restart
+       .quad sys_pfm_create_evtsets
+       .quad sys_pfm_getinfo_evtsets
+       .quad sys_pfm_delete_evtsets
+       .quad sys_pfm_unload_context
 ia32_syscall_end:



-- 

-Stephane
-
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