From: Dean Roe <roe@sgi.com>
To: "Luck, Tony" <tony.luck@intel.com>
Cc: Dean Roe <roe@sgi.com>, linux-ia64@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [ PATCH ] - Avoid slow TLB purges on SGI Altix systems
Date: Thu, 27 Oct 2005 18:31:04 +0000 [thread overview]
Message-ID: <20051027183104.GA12888@sgi.com> (raw)
In-Reply-To: <B8E391BBE9FE384DAA4C5C003888BE6F04C8CF40@scsmsx401.amr.corp.intel.com>
On Thu, Oct 27, 2005 at 09:01:53AM -0700, Luck, Tony wrote:
> - if (mm != current->active_mm) {
> - /* this does happen, but perhaps it's not worth optimizing for? */
> -#ifdef CONFIG_SMP
> - flush_tlb_all();
> -#else
> - mm->context = 0;
> -#endif
> - return;
> - }
>
> Your patch moves this secion of code up to ia64_global_tlb_purge(),
> but the new code that is added there doesn't include the UP case
> where mm->context is set to zero.
>
> -Tony
>
flush_tlb_range() only calls platform_global_tlb_purge() for CONFIG_SMP,
so there's no point in having that code in ia64_global_tlb_purge().
Dean
--
Dean Roe
Silicon Graphics, Inc.
roe@sgi.com
WARNING: multiple messages have this Message-ID (diff)
From: Dean Roe <roe@sgi.com>
To: "Luck, Tony" <tony.luck@intel.com>
Cc: Dean Roe <roe@sgi.com>, linux-ia64@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [ PATCH ] - Avoid slow TLB purges on SGI Altix systems
Date: Thu, 27 Oct 2005 13:31:04 -0500 [thread overview]
Message-ID: <20051027183104.GA12888@sgi.com> (raw)
In-Reply-To: <B8E391BBE9FE384DAA4C5C003888BE6F04C8CF40@scsmsx401.amr.corp.intel.com>
On Thu, Oct 27, 2005 at 09:01:53AM -0700, Luck, Tony wrote:
> - if (mm != current->active_mm) {
> - /* this does happen, but perhaps it's not worth optimizing for? */
> -#ifdef CONFIG_SMP
> - flush_tlb_all();
> -#else
> - mm->context = 0;
> -#endif
> - return;
> - }
>
> Your patch moves this secion of code up to ia64_global_tlb_purge(),
> but the new code that is added there doesn't include the UP case
> where mm->context is set to zero.
>
> -Tony
>
flush_tlb_range() only calls platform_global_tlb_purge() for CONFIG_SMP,
so there's no point in having that code in ia64_global_tlb_purge().
Dean
--
Dean Roe
Silicon Graphics, Inc.
roe@sgi.com
--
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next prev parent reply other threads:[~2005-10-27 18:31 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-10-14 19:55 [ PATCH ] - Avoid slow TLB purges on SGI Altix systems Dean Roe
2005-10-14 19:55 ` Dean Roe
2005-10-27 16:01 ` Luck, Tony
2005-10-27 16:01 ` Luck, Tony
2005-10-27 18:31 ` Dean Roe [this message]
2005-10-27 18:31 ` Dean Roe
2005-10-27 18:41 ` Luck, Tony
2005-10-27 18:41 ` Luck, Tony
2005-10-27 18:44 ` Dean Roe
2005-10-27 18:44 ` Dean Roe
-- strict thread matches above, loose matches on Subject: below --
2005-10-27 20:41 [PATCH] " Dean Roe
2005-10-27 20:41 ` Dean Roe
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