From: jun.nie@linaro•org (Jun Nie)
To: linux-arm-kernel@lists•infradead.org
Subject: CMA related memory questions
Date: Fri, 30 Jan 2015 10:57:24 +0800 [thread overview]
Message-ID: <54CAF314.4070301@linaro.org> (raw)
In-Reply-To: <CABymUCPgEh93QsBtRyg0S+FyE0FHwjAF75qk+NWh5TS8ehWuew@mail.gmail.com>
On 2015?01?30? 10:36, Jun Nie wrote:
> Hi Marek & Arnd,
>
> Did you ever know issue that free CMA memory is high, but system is
> hungry for memory and page cache is very low? I am enabling CMA in
> Android on my board with 512MB memory and see FreeMem in /proc/meminfo
> increase a lot with CMA comparing the reservation solution on boot. But
> I find system is not borrowing memory from CMA pool when running 3dmark
> (high webkit workload at start). Because the FreeMem size is high, but
> cache size decreasing significantly to several MB during benchmark run,
> I suppose system is trying to reclaim memory from pagecache for new
> allocation. My question is that what API that page cache and webkit
> related functionality are using to allocate memory. Maybe page cache
> require memory that is not movable/reclaimable memory, where we may have
> optimization to go thru dma_alloc_xxx to borrow CMA memory? I suppose
> app level memory allocation shall be movable/reclaimable memory and can
> borrow from CMA pool, but not sure whether the flag match the
> movable/reclaimable memory and go thru the right path.
>
> Could you help share your experience/thoughts on this? Thanks!
>
>
> B.R.
> Jun
Add more people.
next parent reply other threads:[~2015-01-30 2:57 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CABymUCNMjM2KHXXB-LM=x+FTcJL6S5_jhG3GbP7VRi2vBoW49g@mail.gmail.com>
[not found] ` <CABymUCO+xaify95bUqfbCLsEjkLzEC0yT_fgkhV+qzC36JNgoA@mail.gmail.com>
[not found] ` <CABymUCPgEh93QsBtRyg0S+FyE0FHwjAF75qk+NWh5TS8ehWuew@mail.gmail.com>
2015-01-30 2:57 ` Jun Nie [this message]
2015-01-30 3:25 ` CMA related memory questions Heesub Shin
2015-01-30 3:43 ` Jun Nie
2015-01-30 5:14 ` Heesub Shin
2015-01-30 8:54 ` Vlastimil Babka
2015-01-30 10:06 ` Hui Zhu
2015-01-30 12:58 ` Joonsoo Kim
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=54CAF314.4070301@linaro.org \
--to=jun.nie@linaro$(echo .)org \
--cc=linux-arm-kernel@lists$(echo .)infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox