Re: Linux 2.6.29

Ric Wheeler
2009-03-25T20:28:24Z

Jeff Garzik wrote:
> Ric Wheeler wrote:> And, as I am sure that you do know, to add insult
> to injury, FLUSH_CACHE
>> is per device (not file system).
>>
>> When you issue an fsync() on a disk with multiple partitions, you
>> will flush the data for all of its partitions from the write cache....
>
> SCSI'S SYNCHRONIZE CACHE command already accepts an (LBA, length)
> pair. We could make use of that.
>
> And I bet we could convince T13 to add FLUSH CACHE RANGE, if we could
> demonstrate clear benefit.
>
> Jeff

How well supported is this in SCSI? Can we try it out with a commodity
SAS drive?

Ric