From: Matthew Wilcox <willy@infradead.org>
To: Robin Murphy <robin.murphy@arm.com>
Cc: Russell King <linux@armlinux.org.uk>,
Andrew Morton <akpm@linux-foundation.org>,
Marek Szyprowski <m.szyprowski@samsung.com>,
linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org
Subject: Re: [PATCH] Fix folio conversion in __dma_page_dev_to_cpu()
Date: Thu, 24 Aug 2023 17:49:29 +0100 [thread overview]
Message-ID: <ZOeKGeAvLPBp1WVs@casper.infradead.org> (raw)
In-Reply-To: <46702101-01b3-1d1d-e5c0-f869c5b88ea5@arm.com>
On Thu, Aug 24, 2023 at 05:39:38PM +0100, Robin Murphy wrote:
> As for >2GB segments, we've certainly seen cases of users mapping absurdly
> large buffers and overflowing dma_length[2], so I would imagine it's only
> the improbability of allocating that much physically-contiguous memory which
> keeps individual segment lengths from getting up to UINT_MAX ;)
With a 32-bit kernel though? ;-)
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next prev parent reply other threads:[~2023-08-24 16:50 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-23 19:18 [PATCH] Fix folio conversion in __dma_page_dev_to_cpu() Matthew Wilcox (Oracle)
2023-08-24 16:39 ` Robin Murphy
2023-08-24 16:49 ` Matthew Wilcox [this message]
2023-08-24 17:14 ` Robin Murphy
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