From: Hillf Danton <hdanton@sina.com>
To: John Stultz <john.stultz@linaro.org>
Cc: James Jones <jajones@nvidia.com>,
Robin Murphy <robin.murphy@arm.com>,
Liam Mark <lmark@codeaurora.org>,
lkml <linux-kernel@vger.kernel.org>,
dri-devel <dri-devel@lists.freedesktop.org>,
Ezequiel Garcia <ezequiel@collabora.com>,
linux-media <linux-media@vger.kernel.org>
Subject: Re: [PATCH v4 5/7] dma-buf: system_heap: Allocate higher order pages if available
Date: Fri, 30 Oct 2020 10:34:27 +0800 [thread overview]
Message-ID: <20201030023427.3078-1-hdanton@sina.com> (raw)
In-Reply-To: <n>
On Thu, 29 Oct 2020 12:34:51 -0700 John Stultz wrote:
>
> As for your comment on HPAGE_PMD_ORDER (9 on arm64/arm) and
> PAGE_ALLOC_COSTLY_ORDER(3), I'm not totally sure I understand your
> question? Are you suggesting those values would be more natural orders
> to choose from?
The numbers, 9 and 3, are not magic themselves but under the mm diretory
they draw more attentions than others do. Sometimes it would take two
minutes for me to work out that HPAGE_PMD_ORDER does not mean 1MiB, on
platforms like arm64 or not.
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next reply other threads:[~2020-10-30 8:25 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-30 2:34 Hillf Danton [this message]
2020-10-30 3:30 ` [PATCH v4 5/7] dma-buf: system_heap: Allocate higher order pages if available John Stultz
-- strict thread matches above, loose matches on Subject: below --
2020-10-29 0:16 [RESEND][PATCH v4 0/7] dma-buf: Performance improvements for system heap & a system-uncached implementation John Stultz
2020-10-29 0:16 ` [PATCH v4 5/7] dma-buf: system_heap: Allocate higher order pages if available John Stultz
2020-10-29 7:02 ` Hillf Danton
2020-10-29 19:34 ` John Stultz
2020-10-17 1:32 [PATCH v4 0/7] dma-buf: Performance improvements for system heap & a system-uncached implementation John Stultz
2020-10-17 1:32 ` [PATCH v4 5/7] dma-buf: system_heap: Allocate higher order pages if available John Stultz
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