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From: Steve Capper <steve.capper@linaro.org>
To: Catalin Marinas <catalin.marinas@arm.com>
Cc: "linux-arm-kernel@lists.infradead.org"
	<linux-arm-kernel@lists.infradead.org>,
	"linux@arm.linux.org.uk" <linux@arm.linux.org.uk>,
	"linux-arch@vger.kernel.org" <linux-arch@vger.kernel.org>,
	"linux-mm@kvack.org" <linux-mm@kvack.org>,
	Will Deacon <Will.Deacon@arm.com>,
	"gary.robertson@linaro.org" <gary.robertson@linaro.org>,
	"christoffer.dall@linaro.org" <christoffer.dall@linaro.org>,
	"peterz@infradead.org" <peterz@infradead.org>,
	"anders.roxell@linaro.org" <anders.roxell@linaro.org>,
	"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
	"dann.frazier@canonical.com" <dann.frazier@canonical.com>,
	Mark Rutland <Mark.Rutland@arm.com>,
	"mgorman@suse.de" <mgorman@suse.de>
Subject: Re: [PATH V2 4/6] arm: mm: Enable RCU fast_gup
Date: Wed, 27 Aug 2014 14:01:08 +0100	[thread overview]
Message-ID: <20140827130107.GA8210@linaro.org> (raw)
In-Reply-To: <20140827115137.GK6968@arm.com>

On Wed, Aug 27, 2014 at 12:51:37PM +0100, Catalin Marinas wrote:
> On Thu, Aug 21, 2014 at 04:43:30PM +0100, Steve Capper wrote:
> > Activate the RCU fast_gup for ARM. We also need to force THP splits to
> > broadcast an IPI s.t. we block in the fast_gup page walker. As THP
> > splits are comparatively rare, this should not lead to a noticeable
> > performance degradation.
> > 
> > Some pre-requisite functions pud_write and pud_page are also added.
> > 
> > Signed-off-by: Steve Capper <steve.capper@linaro.org>
> 
> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>

Thanks.

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WARNING: multiple messages have this Message-ID (diff)
From: Steve Capper <steve.capper@linaro.org>
To: Catalin Marinas <catalin.marinas@arm.com>
Cc: "linux-arm-kernel@lists.infradead.org"
	<linux-arm-kernel@lists.infradead.org>,
	"linux@arm.linux.org.uk" <linux@arm.linux.org.uk>,
	"linux-arch@vger.kernel.org" <linux-arch@vger.kernel.org>,
	"linux-mm@kvack.org" <linux-mm@kvack.org>,
	Will Deacon <Will.Deacon@arm.com>,
	"gary.robertson@linaro.org" <gary.robertson@linaro.org>,
	"christoffer.dall@linaro.org" <christoffer.dall@linaro.org>,
	"peterz@infradead.org" <peterz@infradead.org>,
	"anders.roxell@linaro.org" <anders.roxell@linaro.org>,
	"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
	"dann.frazier@canonical.com" <dann.frazier@canonical.com>,
	Mark Rutland <Mark.Rutland@arm.com>,
	"mgorman@suse.de" <mgorman@suse.de>
Subject: Re: [PATH V2 4/6] arm: mm: Enable RCU fast_gup
Date: Wed, 27 Aug 2014 14:01:08 +0100	[thread overview]
Message-ID: <20140827130107.GA8210@linaro.org> (raw)
Message-ID: <20140827130108.qXg1vPD5C5UFrZ1vqL8sCFFXT8RDmIgArdHwvuXliPo@z> (raw)
In-Reply-To: <20140827115137.GK6968@arm.com>

On Wed, Aug 27, 2014 at 12:51:37PM +0100, Catalin Marinas wrote:
> On Thu, Aug 21, 2014 at 04:43:30PM +0100, Steve Capper wrote:
> > Activate the RCU fast_gup for ARM. We also need to force THP splits to
> > broadcast an IPI s.t. we block in the fast_gup page walker. As THP
> > splits are comparatively rare, this should not lead to a noticeable
> > performance degradation.
> > 
> > Some pre-requisite functions pud_write and pud_page are also added.
> > 
> > Signed-off-by: Steve Capper <steve.capper@linaro.org>
> 
> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>

Thanks.

WARNING: multiple messages have this Message-ID (diff)
From: steve.capper@linaro.org (Steve Capper)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATH V2 4/6] arm: mm: Enable RCU fast_gup
Date: Wed, 27 Aug 2014 14:01:08 +0100	[thread overview]
Message-ID: <20140827130107.GA8210@linaro.org> (raw)
In-Reply-To: <20140827115137.GK6968@arm.com>

On Wed, Aug 27, 2014 at 12:51:37PM +0100, Catalin Marinas wrote:
> On Thu, Aug 21, 2014 at 04:43:30PM +0100, Steve Capper wrote:
> > Activate the RCU fast_gup for ARM. We also need to force THP splits to
> > broadcast an IPI s.t. we block in the fast_gup page walker. As THP
> > splits are comparatively rare, this should not lead to a noticeable
> > performance degradation.
> > 
> > Some pre-requisite functions pud_write and pud_page are also added.
> > 
> > Signed-off-by: Steve Capper <steve.capper@linaro.org>
> 
> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>

Thanks.

  reply	other threads:[~2014-08-27 13:01 UTC|newest]

Thread overview: 78+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-08-21 15:43 [PATH V2 0/6] RCU get_user_pages_fast and __get_user_pages_fast Steve Capper
2014-08-21 15:43 ` Steve Capper
2014-08-21 15:43 ` Steve Capper
2014-08-21 15:43 ` [PATH V2 1/6] mm: Introduce a general RCU get_user_pages_fast Steve Capper
2014-08-21 15:43   ` Steve Capper
2014-08-21 15:43   ` Steve Capper
2014-08-27  8:54   ` Will Deacon
2014-08-27  8:54     ` Will Deacon
2014-08-27  8:54     ` Will Deacon
2014-08-27 12:50     ` Steve Capper
2014-08-27 12:50       ` Steve Capper
2014-08-27 12:50       ` Steve Capper
2014-08-27 13:14       ` Will Deacon
2014-08-27 13:14         ` Will Deacon
2014-08-27 13:14         ` Will Deacon
2014-08-27 14:28   ` Catalin Marinas
2014-08-27 14:28     ` Catalin Marinas
2014-08-27 14:28     ` Catalin Marinas
2014-08-27 14:42     ` Steve Capper
2014-08-27 14:42       ` Steve Capper
2014-08-27 14:42       ` Steve Capper
2014-08-27 15:01   ` Russell King - ARM Linux
2014-08-27 15:01     ` Russell King - ARM Linux
2014-08-27 15:01     ` Russell King - ARM Linux
2014-08-28  8:59     ` Steve Capper
2014-08-28  8:59       ` Steve Capper
2014-08-28  8:59       ` Steve Capper
2014-08-21 15:43 ` [PATH V2 2/6] arm: mm: Introduce special ptes for LPAE Steve Capper
2014-08-21 15:43   ` Steve Capper
2014-08-21 15:43   ` Steve Capper
2014-08-27 10:46   ` Catalin Marinas
2014-08-27 10:46     ` Catalin Marinas
2014-08-27 10:46     ` Catalin Marinas
2014-08-27 12:52     ` Steve Capper
2014-08-27 12:52       ` Steve Capper
2014-08-27 12:52       ` Steve Capper
2014-08-21 15:43 ` [PATH V2 3/6] arm: mm: Enable HAVE_RCU_TABLE_FREE logic Steve Capper
2014-08-21 15:43   ` Steve Capper
2014-08-21 15:43   ` Steve Capper
2014-08-27 11:50   ` Catalin Marinas
2014-08-27 11:50     ` Catalin Marinas
2014-08-27 11:50     ` Catalin Marinas
2014-08-27 12:59     ` Steve Capper
2014-08-27 12:59       ` Steve Capper
2014-08-27 12:59       ` Steve Capper
2014-08-21 15:43 ` [PATH V2 4/6] arm: mm: Enable RCU fast_gup Steve Capper
2014-08-21 15:43   ` Steve Capper
2014-08-21 15:43   ` Steve Capper
2014-08-27 11:51   ` Catalin Marinas
2014-08-27 11:51     ` Catalin Marinas
2014-08-27 11:51     ` Catalin Marinas
2014-08-27 13:01     ` Steve Capper [this message]
2014-08-27 13:01       ` Steve Capper
2014-08-27 13:01       ` Steve Capper
2014-08-21 15:43 ` [PATH V2 5/6] arm64: mm: Enable HAVE_RCU_TABLE_FREE logic Steve Capper
2014-08-21 15:43   ` Steve Capper
2014-08-21 15:43   ` Steve Capper
2014-08-27 10:48   ` Catalin Marinas
2014-08-27 10:48     ` Catalin Marinas
2014-08-27 10:48     ` Catalin Marinas
2014-08-27 13:08     ` Steve Capper
2014-08-27 13:08       ` Steve Capper
2014-08-27 13:08       ` Steve Capper
2014-08-21 15:43 ` [PATH V2 6/6] arm64: mm: Enable RCU fast_gup Steve Capper
2014-08-21 15:43   ` Steve Capper
2014-08-21 15:43   ` Steve Capper
2014-08-27 11:09   ` Catalin Marinas
2014-08-27 11:09     ` Catalin Marinas
2014-08-27 11:09     ` Catalin Marinas
2014-08-27 13:43     ` Steve Capper
2014-08-27 13:43       ` Steve Capper
2014-08-27 13:43       ` Steve Capper
2014-08-21 20:42 ` [PATH V2 0/6] RCU get_user_pages_fast and __get_user_pages_fast Dann Frazier
2014-08-21 20:42   ` Dann Frazier
2014-08-21 20:42   ` Dann Frazier
2014-08-22  8:11   ` Steve Capper
2014-08-22  8:11     ` Steve Capper
2014-08-22  8:11     ` Steve Capper

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