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From: Andrew Morton <akpm@linux-foundation.org>
To: Christoph Hellwig <hch@lst.de>
Cc: Ira Weiny <ira.weiny@intel.com>,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH 1/2] mm: call flush_dcache_page in memcpy_to_page and memzero_page
Date: Tue, 13 Jul 2021 18:31:23 -0700	[thread overview]
Message-ID: <20210713183123.699769a1b0ee95d69606c35d@linux-foundation.org> (raw)
In-Reply-To: <20210713055231.137602-2-hch@lst.de>

On Tue, 13 Jul 2021 07:52:30 +0200 Christoph Hellwig <hch@lst.de> wrote:

> memcpy_to_page and memzero_page can write to arbitrary pages, which could
> be in the page cache or in high memory, so  call flush_kernel_dcache_pages
> to flush the dcache.

I assume this presently is not known to cause any problems, but that
some problems might be discovered in the future?  In which case,
should we cc:stable?


  reply	other threads:[~2021-07-14  1:31 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-13  5:52 fix memcpy_to_page and memzero_page Christoph Hellwig
2021-07-13  5:52 ` [PATCH 1/2] mm: call flush_dcache_page in " Christoph Hellwig
2021-07-14  1:31   ` Andrew Morton [this message]
2021-07-14  5:28     ` Christoph Hellwig
2021-07-14  8:09   ` Ira Weiny
2021-07-13  5:52 ` [PATCH 2/2] mm: use kmap_local_page in memzero_page Christoph Hellwig

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