On 05/04/2011 09:59 PM, shaohua.li@xxxxxxxxx wrote:
flush request isn't queueable in some drives. Add a flag to let driver
notify block layer about this. We can optimize flush performance with the
knowledge.
Signed-off-by: Shaohua Li<shaohua.li@xxxxxxxxx>
---
block/blk-settings.c | 6 ++++++
include/linux/blkdev.h | 7 +++++++
2 files changed, 13 insertions(+)
hmmm.
This assumes that flush on new hardware, by default, is queueable.
I think the sense should be reversed: don't enable the optimization,
unless we know the optimization works.
That seems safer than always enabling the optimization, unless we know
it does not work. That is not a fail-safe mode of operation.
Jeff
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