linux-kernel - RE: [PATCH 2/2] mmc: core: Support packed command for eMMC4.5 device

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Date:	Tue, 15 Nov 2011 04:48:02 -0800 (PST)
From:	merez@...eaurora.org
To:	"Seungwon Jeon" <tgih.jun@...sung.com>
Cc:	merez@...eaurora.org, "'S, Venkatraman'" <svenkatr@...com>,
	linux-mmc@...r.kernel.org, "'Chris Ball'" <cjb@...top.org>,
	linux-kernel@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
	kgene.kim@...sung.com, dh.han@...sung.com
Subject: RE: [PATCH 2/2] mmc: core: Support packed command for eMMC4.5 
     device

>> >>> >> >> > +       if (rqc)
>> >>> >> >> > +               reqs = mmc_blk_chk_packable(mq, rqc);
>> >>>
>> >>> It would be best to keep all the calls to blk_fetch_request in the
>> same
>> >>> location. Therefore, I suggest to move the call to
>> mmc_blk_chk_packable
>> >>> to
>> >>> mmc/card/queue.c after the first request is fetched.
>> >>
>> >> At the first time, I considered that way.
>> >> I'll do more, if possible.
> I considered more.
> I think that mmc_blk_chk_packable would rather be called only for r/w type
> than all request type(e.g. discard, flush).
>
mmc_blk_chk_packable can check the cmd_flags of the request to verify it's
not a flush/disacrad etc. In such cases will not pack.

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