From: Sascha Hauer <s.hauer@pengutronix.de>
To: barebox@lists.infradead.org, Ahmad Fatoum <a.fatoum@barebox.org>
Subject: Re: [PATCH 1/2] ARM: mmu: optimize dma_alloc_coherent for cache-coherent DMA masters
Date: Mon, 19 Jan 2026 11:20:25 +0100 [thread overview]
Message-ID: <176881802536.898747.8623378884331876882.b4-ty@pengutronix.de> (raw)
In-Reply-To: <20260115120557.3433211-1-a.fatoum@barebox.org>
On Thu, 15 Jan 2026 13:05:52 +0100, Ahmad Fatoum wrote:
> If a device is DMA-capable and cache-coherent, it can be considerably
> faster to keep shared memory cached, instead of mapping it uncached
> unconditionally like we currently do.
>
> This was very noticeable when using Virt I/O with KVM acceleration as
> described in commit 3ebd05809a49 ("virtio: don't use DMA API unless
> required").
>
> [...]
Applied, thanks!
[1/2] ARM: mmu: optimize dma_alloc_coherent for cache-coherent DMA masters
https://git.pengutronix.de/cgit/barebox/commit/?id=aefa14324910 (link may not be stable)
[2/2] virtio: use DMA coherent APIs
https://git.pengutronix.de/cgit/barebox/commit/?id=c56e7af5fa98 (link may not be stable)
Best regards,
--
Sascha Hauer <s.hauer@pengutronix.de>
prev parent reply other threads:[~2026-01-19 10:21 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-15 12:05 Ahmad Fatoum
2026-01-15 12:05 ` [PATCH 2/2] virtio: use DMA coherent APIs Ahmad Fatoum
2026-01-19 10:20 ` Sascha Hauer [this message]
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