From: Jonghun Han <jonghun.han@samsung.com>
To: linux-arm-kernel@lists.infradead.org
Subject: RE: Memory sharing issue by application on V4L2 based device driver
Date: Thu, 13 Jan 2011 08:39:24 +0000 [thread overview]
Message-ID: <007b01cbb2fd$64a0f050$2de2d0f0$%han@samsung.com> (raw)
In-Reply-To: <20110111173509.GB14017@dumpdata.com>
Sorry for late reply.
Samsung SoC C210 has many multimedia IPs.
Each IP has its own MMU named SYSTEM MMU like CPU's MMU.
So it can handle discontiguous memory using device own virtual address.
What Inki Dae wants to discuss is how to allocate the memory and how to
share it with other multimedia IPs.
Thank you for interesting.
Best regards,
> -----Original Message-----
> From: linux-fbdev-owner@vger.kernel.org [mailto:linux-fbdev-
> owner@vger.kernel.org] On Behalf Of Konrad Rzeszutek Wilk
> Sent: Wednesday, January 12, 2011 2:35 AM
> To: Jonghun Han
> Cc: 'InKi Dae'; linux-media@vger.kernel.org;
linux-arm-kernel@lists.infradead.org;
> 'linux-fbdev'; kyungmin.park@samsung.com
> Subject: Re: Memory sharing issue by application on V4L2 based device
driver
> with system mmu.
>
>
> .. snip..
> > But 64KB or 1MB physically contiguous memory is better than 4KB page
> > in the point of performance.
>
> Could you explain that in more details please? I presume you are talking
about a
> CPU that has a MMU unit, right?
> --
> To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in
the body
> of a message to majordomo@vger.kernel.org More majordomo info at
> http://vger.kernel.org/majordomo-info.html
next prev parent reply other threads:[~2011-01-13 8:39 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-06 12:57 Memory sharing issue by application on V4L2 based device driver with daeinki
[not found] ` <AANLkTi=P8qY22saY9a_-rze1wsr-DLMgc6Lfa6qnfM7u@mail.gmail.com>
[not found] ` <002201cbadfd$6d59e490$480dadb0$%han@samsung.com>
2011-01-07 2:17 ` Memory sharing issue by application on V4L2 based device driver InKi Dae
2011-01-07 3:19 ` Jonghun Han
2011-01-07 4:19 ` daeinki
2011-01-11 17:35 ` Memory sharing issue by application on V4L2 based device Konrad Rzeszutek Wilk
2011-01-13 8:39 ` Jonghun Han [this message]
2011-01-07 8:54 ` Michel Dänzer
2011-01-07 10:02 ` Memory sharing issue by application on V4L2 based device driver daeinki
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='007b01cbb2fd$64a0f050$2de2d0f0$%han@samsung.com' \
--to=jonghun.han@samsung.com \
--cc=linux-arm-kernel@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
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;
as well as URLs for NNTP newsgroup(s).