From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: Bart Van Assche <bart.vanassche@wdc.com>
Cc: "Martin K . Petersen" <martin.petersen@oracle.com>,
"James E . J . Bottomley" <jejb@linux.vnet.ibm.com>,
linux-scsi@vger.kernel.org, Christoph Hellwig <hch@lst.de>,
Hannes Reinecke <hare@suse.com>,
Johannes Thumshirn <jthumshirn@suse.de>
Subject: Re: [PATCH] sd: Micro-optimize READ / WRITE CDB encoding
Date: Tue, 17 Oct 2017 23:10:42 -0400 [thread overview]
Message-ID: <yq1vajdtakt.fsf@oracle.com> (raw)
In-Reply-To: <20171017210352.19580-1-bart.vanassche@wdc.com> (Bart Van Assche's message of "Tue, 17 Oct 2017 14:03:52 -0700")
Bart,
> Only compute 'threshold' if .last_sector_bug has been set. Reduce
> the number of branches that has to be taken to check the starting
> LBA and transfer length alignment. Optimize the encoding of the
> READ(10), WRITE(10), READ(16), WRITE(16), READ(32) and WRITE(32)
> CDB encoding.
Please take a look at this. It missed 4.15 because I've been fighting a
hardware bug the last several weeks. However, I'd still like to get it
in shape for 4.16:
https://git.kernel.org/pub/scm/linux/kernel/git/mkp/linux.git/log/?h=scsi-work
Feel free to beat me to it.
--
Martin K. Petersen Oracle Linux Engineering
next prev parent reply other threads:[~2017-10-18 3:10 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-17 21:03 [PATCH] sd: Micro-optimize READ / WRITE CDB encoding Bart Van Assche
2017-10-17 22:17 ` Douglas Gilbert
2017-10-17 22:41 ` Bart Van Assche
2017-10-19 6:57 ` Douglas Gilbert
2017-10-25 3:05 ` Douglas Gilbert
2017-10-18 3:10 ` Martin K. Petersen [this message]
2017-10-18 6:20 ` Christoph Hellwig
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