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From: Marek Szyprowski <m.szyprowski@samsung.com>
To: Hillf Danton <hdanton@sina.com>, Christoph Hellwig <hch@lst.de>
Cc: Kees Cook <keescook@chromium.org>,
	linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org,
	James Bottomley <James.Bottomley@HansenPartnership.com>,
	Matthew Wilcox <willy@infradead.org>
Subject: Re: Is it needed to zero out the dma buffer for DMA_ATTR_NO_KERNEL_MAPPING
Date: Fri, 4 Sep 2020 11:10:46 +0200	[thread overview]
Message-ID: <bee6cbc9-f637-9217-5f1b-086d93295f70@samsung.com> (raw)
In-Reply-To: <20200904022801.15828-1-hdanton@sina.com>

Hi

On 04.09.2020 04:28, Hillf Danton wrote:
> Currently the DMA_ATTR_NO_KERNEL_MAPPING buffer allocated is not
> cleared while dma core always zero it out for coherent allocations.
>
> Is it making sense to do memset for the attr?

If it is not cleared then this is a bug. Please propose a patch fixing 
this issue.

Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland


           reply	other threads:[~2020-09-04  9:10 UTC|newest]

Thread overview: expand[flat|nested]  mbox.gz  Atom feed
 [parent not found: <20200904022801.15828-1-hdanton@sina.com>]

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