On 8 May 2011 17:09, Arnd Bergmann a...@arndb.de wrote:
On Saturday 07 May 2011, Per Forlin wrote:
The mmc queue never runs empty until end of transfer.. The requests
are 128 blocks (64k limit set in mmc host driver) compared to 256
blocks before. This will not improve performance much
On 4 May 2011 21:13, Per Forlin per.for...@linaro.org wrote:
On 3 May 2011 22:02, Arnd Bergmann a...@arndb.de wrote:
On Tuesday 03 May 2011 20:54:43 Per Forlin wrote:
page_not_up_to_date:
/* Get exclusive access to the page ... */
error = lock_page_killable(page);
I looked at the code in
On Tuesday 03 May 2011, Per Forlin wrote:
submitting small 512 byte read requests is a real problem when the
underlying page size is 16 KB. If your interpretation is right,
we should probably find a way to make it read larger chunks
on flash media.
Sorry a typo. I missed out a k :)
It
On 3 May 2011 22:02, Arnd Bergmann a...@arndb.de wrote:
On Tuesday 03 May 2011 20:54:43 Per Forlin wrote:
page_not_up_to_date:
/* Get exclusive access to the page ... */
error = lock_page_killable(page);
I looked at the code in do_generic_file_read(). lock_page_killable
waits until the
On Thursday 28 April 2011, Per Forlin wrote:
For reads on the other hand it look like this
root@(none):/ dd if=/dev/mmcblk0 of=/dev/null bs=4k count=256
256+0 records in
256+0 records out
root@(none):/ dmesg
[mmc_queue_thread] req d954cec0 blocks 32
[mmc_queue_thread] req (null) blocks 0
On 3 May 2011 15:16, Arnd Bergmann a...@arndb.de wrote:
On Thursday 28 April 2011, Per Forlin wrote:
For reads on the other hand it look like this
root@(none):/ dd if=/dev/mmcblk0 of=/dev/null bs=4k count=256
256+0 records in
256+0 records out
root@(none):/ dmesg
[mmc_queue_thread] req
On Tuesday 03 May 2011 20:54:43 Per Forlin wrote:
page_not_up_to_date:
/* Get exclusive access to the page ... */
error = lock_page_killable(page);
I looked at the code in do_generic_file_read(). lock_page_killable
waits until the current read ahead is completed.
Is it possible to
On 3 May 2011 22:02, Arnd Bergmann a...@arndb.de wrote:
On Tuesday 03 May 2011 20:54:43 Per Forlin wrote:
page_not_up_to_date:
/* Get exclusive access to the page ... */
error = lock_page_killable(page);
I looked at the code in do_generic_file_read(). lock_page_killable
waits until the
Hi,
I am working on minimizing the latency between two block requests in
the mmc framework. The approach is simple. If there are more than one
request in the block queue the 2nd request will be prepared while the
1st request is being transfered. When the 1 st request is completed
the 2nd request
Hi,
I am working on minimizing the latency between two block requests in
the mmc framework. The approach is simple. If there are more than one
request in the block queue the 2nd request will be prepared while the
1st request is being transfered. When the 1 st request is completed
the 2nd request
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