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From: Greg KH <gregkh@suse.de>
To: linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 3/5] DMA: reduce the number of memory allocations
Date: Thu, 19 Aug 2010 16:02:55 +0000	[thread overview]
Message-ID: <20100819160255.GA3948@suse.de> (raw)
In-Reply-To: <Pine.LNX.4.64.1008191744560.26145@axis700.grange>

On Thu, Aug 19, 2010 at 05:46:38PM +0200, Guennadi Liakhovetski wrote:
> On Thu, 19 Aug 2010, Greg KH wrote:
> 
> > On Thu, Aug 19, 2010 at 04:40:15PM +0200, Guennadi Liakhovetski wrote:
> > > Allocate the bitmap in dma_declare_coherent_memory() together with the struct
> > > dma_coherent_mem object.
> > 
> > You describe what you did, but _why_ are you doing it?
> 
> Well, to me the subject "_reduce_ the number..." is already a reason 
> enough - the fewer kmalloc's of 20 bytes - the better, I think. But if you 
> like, I can update the description too.

Yes, as I missed that, others might as well :)

thanks,

greg k-h

WARNING: multiple messages have this Message-ID (diff)
From: gregkh@suse.de (Greg KH)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 3/5] DMA: reduce the number of memory allocations
Date: Thu, 19 Aug 2010 09:02:55 -0700	[thread overview]
Message-ID: <20100819160255.GA3948@suse.de> (raw)
In-Reply-To: <Pine.LNX.4.64.1008191744560.26145@axis700.grange>

On Thu, Aug 19, 2010 at 05:46:38PM +0200, Guennadi Liakhovetski wrote:
> On Thu, 19 Aug 2010, Greg KH wrote:
> 
> > On Thu, Aug 19, 2010 at 04:40:15PM +0200, Guennadi Liakhovetski wrote:
> > > Allocate the bitmap in dma_declare_coherent_memory() together with the struct
> > > dma_coherent_mem object.
> > 
> > You describe what you did, but _why_ are you doing it?
> 
> Well, to me the subject "_reduce_ the number..." is already a reason 
> enough - the fewer kmalloc's of 20 bytes - the better, I think. But if you 
> like, I can update the description too.

Yes, as I missed that, others might as well :)

thanks,

greg k-h

  reply	other threads:[~2010-08-19 16:02 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-08-19 14:39 [PATCH 0/5] Add API for DMA memory reservation for devices Guennadi Liakhovetski
2010-08-19 14:39 ` Guennadi Liakhovetski
2010-08-19 14:40 ` [PATCH 1/5] DMA: Remove unneeded "extern" from function declarations Guennadi Liakhovetski
2010-08-19 14:40   ` Guennadi Liakhovetski
2010-08-19 14:40 ` [PATCH 2/5] DMA: dma_declare_coherent_memory() should return an Guennadi Liakhovetski
2010-08-19 14:40   ` [PATCH 2/5] DMA: dma_declare_coherent_memory() should return an error if unsupported Guennadi Liakhovetski
2010-08-19 14:40 ` [PATCH 3/5] DMA: reduce the number of memory allocations Guennadi Liakhovetski
2010-08-19 14:40   ` Guennadi Liakhovetski
2010-08-19 15:35   ` Greg KH
2010-08-19 15:35     ` Greg KH
2010-08-19 15:46     ` Guennadi Liakhovetski
2010-08-19 15:46       ` Guennadi Liakhovetski
2010-08-19 16:02       ` Greg KH [this message]
2010-08-19 16:02         ` Greg KH
2010-09-14  8:52         ` Paul Mundt
2010-09-14  8:52           ` Paul Mundt
2010-09-15  7:23           ` Guennadi Liakhovetski
2010-09-15  7:23             ` Guennadi Liakhovetski
2010-09-16  2:58             ` FUJITA Tomonori
2010-09-16  2:58               ` FUJITA Tomonori
2010-09-16  7:04               ` Russell King - ARM Linux
2010-09-16  7:04                 ` Russell King - ARM Linux
2010-09-16  7:08                 ` FUJITA Tomonori
2010-09-16  7:08                   ` FUJITA Tomonori
2010-09-16  4:22             ` Paul Mundt
2010-09-16  4:22               ` Paul Mundt
2010-08-20  1:15   ` Michał Nazarewicz
2010-08-20  1:15     ` Michał Nazarewicz
2010-08-19 14:40 ` [PATCH 4/5] DMA: Add functions to preallocate DMA memory dor devices Guennadi Liakhovetski
2010-08-19 14:40   ` Guennadi Liakhovetski
2010-09-02 10:50   ` [PATCH 4/5] DMA: Add functions to preallocate DMA memory dor Russell King - ARM Linux
2010-09-02 10:50     ` [PATCH 4/5] DMA: Add functions to preallocate DMA memory dor devices Russell King - ARM Linux
2010-09-15  7:28     ` [PATCH 4/5] DMA: Add functions to preallocate DMA memory dor 
2010-09-15  7:28       ` [PATCH 4/5] DMA: Add functions to preallocate DMA memory dor devices Uwe Kleine-König
2010-08-19 14:40 ` [PATCH 5/5] SH: use dma_preallocate_coherent_memory() for platform Guennadi Liakhovetski
2010-08-19 14:40   ` [PATCH 5/5] SH: use dma_preallocate_coherent_memory() for platform device memory Guennadi Liakhovetski

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