From: Timur Tabi <timur@freescale.com>
To: Qiang Liu <qiang.liu@freescale.com>
Cc: <linux-crypto@vger.kernel.org>, <linuxppc-dev@lists.ozlabs.org>,
Vinod Koul <vinod.koul@intel.com>, <herbert@gondor.hengli.com.au>,
Dan Williams <dan.j.williams@intel.com>,
Li Yang <leoli@freescale.com>, <davem@davemloft.net>
Subject: Re: [linuxppc-release] [PATCH v2 4/4] fsl-dma: use spin_lock_bh to instead of spin_lock_irqsave
Date: Wed, 11 Jul 2012 10:01:01 -0500 [thread overview]
Message-ID: <4FFD952D.8040201@freescale.com> (raw)
In-Reply-To: <1341997326-18495-1-git-send-email-qiang.liu@freescale.com>
Qiang Liu wrote:
> Use spin_lock_bh to instead of spin_lock_irqsave for improving performance.
Please provide some evidence that performance has improved, as well as an
explanation why it's okay to use spin_lock_bh, and why it's faster.
--
Timur Tabi
Linux kernel developer at Freescale
WARNING: multiple messages have this Message-ID (diff)
From: Timur Tabi <timur@freescale.com>
To: Qiang Liu <qiang.liu@freescale.com>
Cc: Vinod Koul <vinod.koul@intel.com>,
herbert@gondor.hengli.com.au, linux-crypto@vger.kernel.org,
Dan Williams <dan.j.williams@intel.com>,
linuxppc-dev@lists.ozlabs.org, davem@davemloft.net
Subject: Re: [linuxppc-release] [PATCH v2 4/4] fsl-dma: use spin_lock_bh to instead of spin_lock_irqsave
Date: Wed, 11 Jul 2012 10:01:01 -0500 [thread overview]
Message-ID: <4FFD952D.8040201@freescale.com> (raw)
In-Reply-To: <1341997326-18495-1-git-send-email-qiang.liu@freescale.com>
Qiang Liu wrote:
> Use spin_lock_bh to instead of spin_lock_irqsave for improving performance.
Please provide some evidence that performance has improved, as well as an
explanation why it's okay to use spin_lock_bh, and why it's faster.
--
Timur Tabi
Linux kernel developer at Freescale
next prev parent reply other threads:[~2012-07-11 15:01 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-11 9:02 [PATCH v2 4/4] fsl-dma: use spin_lock_bh to instead of spin_lock_irqsave Qiang Liu
2012-07-11 9:02 ` Qiang Liu
2012-07-11 15:01 ` Timur Tabi [this message]
2012-07-11 15:01 ` [linuxppc-release] " Timur Tabi
2012-07-12 9:07 ` Liu Qiang-B32616
2012-07-12 9:07 ` Liu Qiang-B32616
2012-07-12 18:23 ` Timur Tabi
2012-07-12 18:23 ` Timur Tabi
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