I'm sure it was to improve the performance of some SSD we were testing at
Spectra.
--
Justin
> On Nov 22, 2017, at 9:16 AM, Alan Somers wrote:
>
> I believe the original motivation was to reduce FLUSH CACHE EXT
> activity with some old SSDs that handled that command very slowly.
> gibbs might
I believe the original motivation was to reduce FLUSH CACHE EXT
activity with some old SSDs that handled that command very slowly.
gibbs might know more.
On Tue, Nov 21, 2017 at 1:14 PM, Ronald Klop wrote:
> Out of curiosity, What is the use case which this improves? Does happen in
> daily usage
Out of curiosity, What is the use case which this improves? Does happen in
daily usage or mostly in testing?
Regards,
Ronald.
On Mon, 20 Nov 2017 23:27:34 +0100, Alan Somers
wrote:
Author: asomers
Date: Mon Nov 20 22:27:33 2017
New Revision: 326036
URL: https://svnweb.freebsd.org/change
Author: asomers
Date: Mon Nov 20 22:27:33 2017
New Revision: 326036
URL: https://svnweb.freebsd.org/changeset/base/326036
Log:
da(4): Short-circuit unnecessary BIO_FLUSH commands
sys/cam/scsi/scsi_da.c
Complete BIO_FLUSH commands immediately if the da(4) device hasn't
been w
