From: gregkh@linuxfoundation.org (Greg KH)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2] mm: dmapool: use provided gfp flags for all dma_alloc_coherent() calls
Date: Tue, 15 Jan 2013 09:50:20 -0800 [thread overview]
Message-ID: <20130115175020.GA3764@kroah.com> (raw)
In-Reply-To: <20130115165642.GA25500@titan.lakedaemon.net>
On Tue, Jan 15, 2013 at 11:56:42AM -0500, Jason Cooper wrote:
> Greg,
>
> I've added you to the this thread hoping for a little insight into USB
> drivers and their use of coherent and GFP_ATOMIC. Am I barking up the
> wrong tree by looking a the drivers?
I don't understand, which drivers are you referring to? USB host
controller drivers, or the "normal" drivers? Most USB drivers use
GFP_ATOMIC if they are creating memory during their URB callback path,
as that is interrupt context. But it shouldn't be all that bad, and the
USB core hasn't changed in a while, so something else must be causing
this.
greg k-h
WARNING: multiple messages have this Message-ID (diff)
From: Greg KH <gregkh@linuxfoundation.org>
To: Jason Cooper <jason@lakedaemon.net>
Cc: Soeren Moch <smoch@web.de>,
Marek Szyprowski <m.szyprowski@samsung.com>,
Thomas Petazzoni <thomas.petazzoni@free-electrons.com>,
Andrew Lunn <andrew@lunn.ch>, Arnd Bergmann <arnd@arndb.de>,
Michal Hocko <mhocko@suse.cz>,
linux-kernel@vger.kernel.org, linaro-mm-sig@lists.linaro.org,
linux-mm@kvack.org, Kyungmin Park <kyungmin.park@samsung.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Andrew Morton <akpm@linux-foundation.org>,
Mel Gorman <mgorman@suse.de>,
linux-arm-kernel@lists.infradead.org,
Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Subject: Re: [PATCH v2] mm: dmapool: use provided gfp flags for all dma_alloc_coherent() calls
Date: Tue, 15 Jan 2013 09:50:20 -0800 [thread overview]
Message-ID: <20130115175020.GA3764@kroah.com> (raw)
In-Reply-To: <20130115165642.GA25500@titan.lakedaemon.net>
On Tue, Jan 15, 2013 at 11:56:42AM -0500, Jason Cooper wrote:
> Greg,
>
> I've added you to the this thread hoping for a little insight into USB
> drivers and their use of coherent and GFP_ATOMIC. Am I barking up the
> wrong tree by looking a the drivers?
I don't understand, which drivers are you referring to? USB host
controller drivers, or the "normal" drivers? Most USB drivers use
GFP_ATOMIC if they are creating memory during their URB callback path,
as that is interrupt context. But it shouldn't be all that bad, and the
USB core hasn't changed in a while, so something else must be causing
this.
greg k-h
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WARNING: multiple messages have this Message-ID (diff)
From: Greg KH <gregkh@linuxfoundation.org>
To: Jason Cooper <jason@lakedaemon.net>
Cc: Soeren Moch <smoch@web.de>,
Marek Szyprowski <m.szyprowski@samsung.com>,
Thomas Petazzoni <thomas.petazzoni@free-electrons.com>,
Andrew Lunn <andrew@lunn.ch>, Arnd Bergmann <arnd@arndb.de>,
Michal Hocko <mhocko@suse.cz>,
linux-kernel@vger.kernel.org, linaro-mm-sig@lists.linaro.org,
linux-mm@kvack.org, Kyungmin Park <kyungmin.park@samsung.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Andrew Morton <akpm@linux-foundation.org>,
Mel Gorman <mgorman@suse.de>,
linux-arm-kernel@lists.infradead.org,
Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Subject: Re: [PATCH v2] mm: dmapool: use provided gfp flags for all dma_alloc_coherent() calls
Date: Tue, 15 Jan 2013 09:50:20 -0800 [thread overview]
Message-ID: <20130115175020.GA3764@kroah.com> (raw)
In-Reply-To: <20130115165642.GA25500@titan.lakedaemon.net>
On Tue, Jan 15, 2013 at 11:56:42AM -0500, Jason Cooper wrote:
> Greg,
>
> I've added you to the this thread hoping for a little insight into USB
> drivers and their use of coherent and GFP_ATOMIC. Am I barking up the
> wrong tree by looking a the drivers?
I don't understand, which drivers are you referring to? USB host
controller drivers, or the "normal" drivers? Most USB drivers use
GFP_ATOMIC if they are creating memory during their URB callback path,
as that is interrupt context. But it shouldn't be all that bad, and the
USB core hasn't changed in a while, so something else must be causing
this.
greg k-h
next prev parent reply other threads:[~2013-01-15 17:50 UTC|newest]
Thread overview: 181+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-08 6:38 [PATCH] mm: dmapool: use provided gfp flags for all dma_alloc_coherent() calls Marek Szyprowski
2012-11-08 6:38 ` Marek Szyprowski
2012-11-08 6:38 ` Marek Szyprowski
2012-11-11 17:22 ` Andrew Lunn
2012-11-11 17:22 ` Andrew Lunn
2012-11-11 17:22 ` Andrew Lunn
2012-11-12 9:48 ` Soeren Moch
2012-11-12 9:48 ` Soeren Moch
2012-11-12 9:48 ` Soeren Moch
2012-11-12 10:38 ` Andrew Lunn
2012-11-12 10:38 ` Andrew Lunn
2012-11-12 10:38 ` Andrew Lunn
2012-11-12 11:03 ` Soeren Moch
2012-11-12 11:03 ` Soeren Moch
2012-11-12 11:03 ` Soeren Moch
2012-11-11 17:31 ` [PATCH] ARM: Orion: Remove redundent init_dma_coherent_pool_size() Andrew Lunn
2012-11-19 0:20 ` Jason Cooper
2013-04-17 20:38 ` Jason Cooper
2013-04-17 20:49 ` Gregory CLEMENT
2013-05-13 19:38 ` Jason Cooper
2012-11-19 0:18 ` [PATCH] mm: dmapool: use provided gfp flags for all dma_alloc_coherent() calls Jason Cooper
2012-11-19 0:18 ` Jason Cooper
2012-11-19 0:18 ` Jason Cooper
2012-11-19 22:48 ` Andrew Morton
2012-11-19 22:48 ` Andrew Morton
2012-11-19 22:48 ` Andrew Morton
2012-11-20 10:48 ` Marek Szyprowski
2012-11-20 10:48 ` Marek Szyprowski
2012-11-20 10:48 ` Marek Szyprowski
2012-11-20 19:52 ` Andrew Morton
2012-11-20 19:52 ` Andrew Morton
2012-11-20 19:52 ` Andrew Morton
2012-11-20 14:31 ` [PATCH v2] " Marek Szyprowski
2012-11-20 14:31 ` Marek Szyprowski
2012-11-20 14:31 ` Marek Szyprowski
2012-11-20 19:33 ` Andrew Morton
2012-11-20 19:33 ` Andrew Morton
2012-11-20 19:33 ` Andrew Morton
2012-11-20 20:27 ` Jason Cooper
2012-11-20 20:27 ` Jason Cooper
2012-11-20 20:27 ` Jason Cooper
2012-11-21 8:08 ` Marek Szyprowski
2012-11-21 8:08 ` Marek Szyprowski
2012-11-21 8:08 ` Marek Szyprowski
2012-11-21 8:36 ` Andrew Morton
2012-11-21 8:36 ` Andrew Morton
2012-11-21 8:36 ` Andrew Morton
2012-11-21 9:20 ` Marek Szyprowski
2012-11-21 9:20 ` Marek Szyprowski
2012-11-21 9:20 ` Marek Szyprowski
2012-11-21 19:17 ` Andrew Morton
2012-11-21 19:17 ` Andrew Morton
2012-11-21 19:17 ` Andrew Morton
2012-11-22 12:55 ` Marek Szyprowski
2012-11-22 12:55 ` Marek Szyprowski
2012-11-22 12:55 ` Marek Szyprowski
2013-01-14 11:56 ` Soeren Moch
2013-01-14 11:56 ` Soeren Moch
2013-01-14 11:56 ` Soeren Moch
2013-01-15 16:56 ` Jason Cooper
2013-01-15 16:56 ` Jason Cooper
2013-01-15 16:56 ` Jason Cooper
2013-01-15 17:50 ` Greg KH [this message]
2013-01-15 17:50 ` Greg KH
2013-01-15 17:50 ` Greg KH
2013-01-15 20:16 ` Jason Cooper
2013-01-15 20:16 ` Jason Cooper
2013-01-15 20:16 ` Jason Cooper
2013-01-15 21:56 ` Jason Cooper
2013-01-15 21:56 ` Jason Cooper
2013-01-15 21:56 ` Jason Cooper
2013-01-16 0:17 ` Soeren Moch
2013-01-16 0:17 ` Soeren Moch
2013-01-16 0:17 ` Soeren Moch
2013-01-16 2:40 ` Jason Cooper
2013-01-16 2:40 ` Jason Cooper
2013-01-16 2:40 ` Jason Cooper
2013-01-16 3:24 ` Soeren Moch
2013-01-16 3:24 ` Soeren Moch
2013-01-16 3:24 ` Soeren Moch
2013-01-16 8:55 ` Soeren Moch
2013-01-16 8:55 ` Soeren Moch
2013-01-16 8:55 ` Soeren Moch
2013-01-16 15:50 ` [PATCH] ata: sata_mv: fix sg_tbl_pool alignment Jason Cooper
2013-01-16 15:50 ` Jason Cooper
2013-01-16 15:50 ` Jason Cooper
2013-01-16 17:05 ` Soeren Moch
2013-01-16 17:05 ` Soeren Moch
2013-01-16 17:05 ` Soeren Moch
2013-01-16 17:52 ` Jason Cooper
2013-01-16 17:52 ` Jason Cooper
2013-01-16 17:52 ` Jason Cooper
2013-01-16 18:35 ` Jason Cooper
2013-01-16 18:35 ` Jason Cooper
2013-01-16 18:35 ` Jason Cooper
2013-01-16 22:26 ` Soeren Moch
2013-01-16 22:26 ` Soeren Moch
2013-01-16 22:26 ` Soeren Moch
2013-01-16 23:10 ` Soeren Moch
2013-01-16 23:10 ` Soeren Moch
2013-01-16 23:10 ` Soeren Moch
2013-01-17 9:11 ` Soeren Moch
2013-01-17 9:11 ` Soeren Moch
2013-01-17 9:11 ` Soeren Moch
2013-01-16 17:32 ` [PATCH v2] mm: dmapool: use provided gfp flags for all dma_alloc_coherent() calls Soeren Moch
2013-01-16 17:32 ` Soeren Moch
2013-01-16 17:32 ` Soeren Moch
2013-01-16 17:47 ` Jason Cooper
2013-01-16 17:47 ` Jason Cooper
2013-01-16 17:47 ` Jason Cooper
2013-01-16 22:36 ` Soeren Moch
2013-01-16 22:36 ` Soeren Moch
2013-01-16 22:36 ` Soeren Moch
2013-01-17 10:49 ` Arnd Bergmann
2013-01-17 10:49 ` Arnd Bergmann
2013-01-17 10:49 ` Arnd Bergmann
2013-01-17 13:47 ` Soeren Moch
2013-01-17 13:47 ` Soeren Moch
2013-01-17 13:47 ` Soeren Moch
2013-01-17 20:26 ` Arnd Bergmann
2013-01-17 20:26 ` Arnd Bergmann
2013-01-17 20:26 ` Arnd Bergmann
2013-01-19 15:29 ` Soeren Moch
2013-01-19 15:29 ` Soeren Moch
2013-01-19 18:59 ` Andrew Lunn
2013-01-19 18:59 ` Andrew Lunn
2013-01-19 18:59 ` Andrew Lunn
2013-01-23 15:30 ` Soeren Moch
2013-01-23 15:30 ` Soeren Moch
2013-01-23 15:30 ` Soeren Moch
2013-01-23 16:25 ` Andrew Lunn
2013-01-23 16:25 ` Andrew Lunn
2013-01-23 16:25 ` Andrew Lunn
2013-01-23 17:07 ` Soeren Moch
2013-01-23 17:07 ` Soeren Moch
2013-01-23 17:07 ` Soeren Moch
2013-01-23 17:20 ` Soeren Moch
2013-01-23 17:20 ` Soeren Moch
2013-01-23 17:20 ` Soeren Moch
2013-01-23 18:10 ` Andrew Lunn
2013-01-23 18:10 ` Andrew Lunn
2013-01-23 18:10 ` Andrew Lunn
2013-01-28 20:59 ` Soeren Moch
2013-01-28 20:59 ` Soeren Moch
2013-01-28 20:59 ` Soeren Moch
2013-01-29 0:13 ` Jason Cooper
2013-01-29 0:13 ` Jason Cooper
2013-01-29 0:13 ` Jason Cooper
2013-01-29 11:02 ` Andrew Lunn
2013-01-29 11:02 ` Andrew Lunn
2013-01-29 11:02 ` Andrew Lunn
2013-01-29 11:50 ` Soeren Moch
2013-01-29 11:50 ` Soeren Moch
2013-01-29 11:50 ` Soeren Moch
2013-01-19 20:05 ` Arnd Bergmann
2013-01-19 20:05 ` Arnd Bergmann
2013-01-19 20:05 ` Arnd Bergmann
2013-01-21 15:01 ` Soeren Moch
2013-01-21 15:01 ` Soeren Moch
2013-01-21 15:01 ` Soeren Moch
2013-01-21 18:55 ` Arnd Bergmann
2013-01-21 18:55 ` Arnd Bergmann
2013-01-21 18:55 ` Arnd Bergmann
2013-01-21 21:01 ` Greg KH
2013-01-21 21:01 ` Greg KH
2013-01-21 21:01 ` Greg KH
2013-01-22 18:13 ` Arnd Bergmann
2013-01-22 18:13 ` Arnd Bergmann
2013-01-22 18:13 ` Arnd Bergmann
2013-01-23 14:37 ` Soeren Moch
2013-01-23 14:37 ` Soeren Moch
2013-01-23 14:37 ` Soeren Moch
2013-01-19 16:24 ` Andrew Lunn
2013-01-19 16:24 ` Andrew Lunn
2013-01-19 16:24 ` Andrew Lunn
2013-01-15 20:05 ` Sebastian Hesselbarth
2013-01-15 20:05 ` Sebastian Hesselbarth
2013-01-15 20:05 ` Sebastian Hesselbarth
2013-01-15 20:19 ` Jason Cooper
2013-01-15 20:19 ` Jason Cooper
2013-01-15 20:19 ` Jason Cooper
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