From: Phil Karn <karn@ka9q.net>
To: Matthias Schniedermeyer <ms@citd.de>
Cc: xfs@oss.sgi.com
Subject: Re: TRIM details
Date: Fri, 07 Jan 2011 06:15:15 -0800 [thread overview]
Message-ID: <4D271FF3.7060303@ka9q.net> (raw)
In-Reply-To: <20110107091720.GA6921@citd.de>
On 1/7/11 1:17 AM, Matthias Schniedermeyer wrote:
> Altough, after thinking about it a little more. Doing a Population count
> in the controller while the data comes in over the wire can't be that
> expensive.
Doesn't even have to be a popcount. Just OR every word into a register
as the data flies by and look to see if the result is 0.
_______________________________________________
xfs mailing list
xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs
next prev parent reply other threads:[~2011-01-07 14:13 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-07 3:22 TRIM details Phil Karn
2011-01-07 4:35 ` Martin K. Petersen
2011-01-07 9:11 ` Matthias Schniedermeyer
2011-01-07 9:17 ` Matthias Schniedermeyer
2011-01-07 14:15 ` Phil Karn [this message]
2011-01-07 14:13 ` Phil Karn
2011-01-07 16:50 ` Martin K. Petersen
2011-01-07 23:43 ` Phil Karn
2011-01-07 14:21 ` Phil Karn
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4D271FF3.7060303@ka9q.net \
--to=karn@ka9q.net \
--cc=ms@citd.de \
--cc=xfs@oss.sgi.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.