Hi Adrian,
On 2017/10/26 19:32, Adrian Hunter wrote:
On 26/10/17 13:46, Ulf Hansson wrote:
On 26 October 2017 at 03:19, Shawn Lin <shawn.lin@xxxxxxxxxxxxxx> wrote:
Hi, Ulf
On 2017/9/27 11:40, Shawn Lin wrote:
Per SD specification version 4.10, section 4.3.4, it says "pre-erased
(ACMD23) will make a following Multiple Block Write operation faster
compared to the same operation without preceding ACMD23". ACMD23 is
mandatory for all sd cards and the spec also says "Command STOP_TRAN
(CMD12) shall be used to stop the transmission in Write Multiple Block
whether or not the preerase (ACMD23) feature is used."
Ping... :)
Hi Shawn,
Actually I was waiting for confirmation from Jan about his tests.
However, overall the series looks reasonable to me.
Obviously the blk-mq patches do not have support for this. Please apply the
blk-mq patches first.
Ok, I will rebase this on the top of your V12 of cqe+mq patchset.
What were the performance numbers?
I did have some test result about performance, but actually there were
not any gain or regression from the result, so I didn't provide the
numbers as it doesn't seem to improve te performance but just change
the behaviour for how the sd cards do multiple write w/o CMD23
support.
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