linux-kernel - Re: [patch 05/19] perfmon2 minimal v2: X86 generic code

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Date:	Thu, 26 Jun 2008 12:40:48 +0200
From:	"stephane eranian" <eranian@...glemail.com>
To:	"Stephen Rothwell" <sfr@...b.auug.org.au>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [patch 05/19] perfmon2 minimal v2: X86 generic code

Stephen,

The patch series is currently structured in such a way that the stack
is not build-able at each step.
I should add this to the introduction but you have a first "plateau"
at perfmon-syscalls. You cannot
build before that.


As for the linux-next, I do not use it currently, I am still on
mainline, maybe that's a mistake.
I will look into this tree.

As for IPI, I hope they have maintained a smp_call_function_single()
kind of functionality.

Thanks for your feedback and keep it coming.

On Mon, Jun 23, 2008 at 6:11 PM, Stephen Rothwell <sfr@...b.auug.org.au> wrote:
> Hi Stephane,
>
> On Tue, 17 Jun 2008 15:02:22 -0700 (PDT) eranian@...glemail.com wrote:
>>
>> This patch adds the X86 generic perfmon2 code. It is in charge of
>> implementing certain key functionalities required by the generic
>> code such as read/write of the PMU registers, low-level interrupt
>> handling.
>
> After applying patches 1-5, building an x86_64 allmodconfig produces
> these errors:
>
> In file included from include/linux/perfmon_kern.h:167,
>                 from arch/x86/perfmon/perfmon.c:25:
> include/linux/perfmon_pmu.h:92: warning: 'struct pfarg_pmc' declared inside parameter list
> include/linux/perfmon_pmu.h:92: warning: its scope is only this definition or declaration, which is probably not what you want
> include/linux/perfmon_pmu.h:96: warning: 'struct pfarg_pmd' declared inside parameter list
>
> Those structures aren't defined until patch 11.
>
> In file included from arch/x86/perfmon/perfmon.c:25:
> include/linux/perfmon_kern.h: In function 'pfm_copy_thread':
> include/linux/perfmon_kern.h:199: error: 'TIF_PERFMON_CTXSW' undeclared (first use in this function)
> arch/x86/perfmon/perfmon.c: In function 'smp_pmu_interrupt':
> arch/x86/perfmon/perfmon.c:338: error: 'LOCAL_PERFMON_VECTOR' undeclared (first use in this function)
> arch/x86/perfmon/perfmon.c: In function 'pfm_arch_resend_irq':
> arch/x86/perfmon/perfmon.c:451: error: 'LOCAL_PERFMON_VECTOR' undeclared (first use in this function)
> arch/x86/perfmon/perfmon.c: In function 'pfm_arch_pmu_acquire_percpu':
> arch/x86/perfmon/perfmon.c:475: error: 'LOCAL_PERFMON_VECTOR' undeclared (first use in this function)
>
> These are not defined until patch 7.
>
> So I think some rearrangement is still required.
>
> Also, some of the x86 files that you are modifying have had their 32 and
> 64 bit versions combined in linux-next (which is the stuff of the next
> merge window) so just a heads up that there will be more merge work then.
> Lastly, some of this will clash with the generic IPIs work.
>
> I don't want to put you off, you have done great work here, thanks.
>
> --
> Cheers,
> Stephen Rothwell                    sfr@...b.auug.org.au
> http://www.canb.auug.org.au/~sfr/
>
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