linux-kernel - Re: Question about cacheline aligned memory for DMA transfers

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Message-ID: <554B0FA2.8000503@ladisch.de>
Date:	Thu, 07 May 2015 09:09:22 +0200
From:	Clemens Ladisch <clemens@...isch.de>
To:	Johannes Thoma <johannes@...annesthoma.com>,
	linux-kernel@...r.kernel.org
Subject: Re: Question about cacheline aligned memory for DMA transfers

Johannes Thoma wrote:
> Does kmalloc return only memory that is cache line aligned?

Yes.

> do all architectures handle cache line misalign ed dma accesses
> correctly?

x86 does.  Most other architectures do not have DMA-coherent caches.


Regards,
Clemens
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