From: "Denis Vlasenko" <vda.linux@googlemail.com>
To: "Arjan van de Ven" <arjan@infradead.org>
Cc: "Roman Zippel" <zippel@linux-m68k.org>,
"Jonathan Corbet" <corbet@lwn.net>,
linux-kernel@vger.kernel.org,
"Thomas Gleixner" <tglx@linutronix.de>,
akpm@linux-foundation.org, "Ingo Molnar" <mingo@elte.hu>
Subject: Re: [PATCH] msleep() with hrtimers
Date: Thu, 9 Aug 2007 20:31:28 +0100 [thread overview]
Message-ID: <1158166a0708091231r21903840mc927b6baa47e4598@mail.gmail.com> (raw)
In-Reply-To: <1186546512.2862.3.camel@laptopd505.fenrus.org>
On 8/8/07, Arjan van de Ven <arjan@infradead.org> wrote:
> You keep claiming that hrtimers are so incredibly expensive; but for
> msleep()... which is mostly called during driver init ... I really don't
> buy that it's really expensive. We're not doing this a gazilion times
> per second obviously...
Yes. Optimizing delay or sleep functions for speed is a contradiction
of terms. IIRC we still optimize udelay for speed, not code size...
Read it again folks:
We optimize udelay for speed
How fast your udelay do you want to be today?
Oh well.
--
vda
next prev parent reply other threads:[~2007-08-09 19:31 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-03 18:37 [PATCH] msleep() with hrtimers Jonathan Corbet
2007-08-03 18:54 ` Ingo Molnar
2007-08-03 19:19 ` Roman Zippel
2007-08-03 19:46 ` Arjan van de Ven
2007-08-03 19:58 ` Roman Zippel
2007-08-03 23:53 ` Arjan van de Ven
2007-08-04 3:00 ` Roman Zippel
2007-08-04 19:19 ` Arjan van de Ven
2007-08-06 0:09 ` Roman Zippel
2007-08-06 0:43 ` Arjan van de Ven
2007-08-06 1:03 ` Roman Zippel
2007-08-06 5:39 ` Arjan van de Ven
2007-08-06 10:03 ` Roman Zippel
2007-08-06 10:20 ` Manu Abraham
2007-08-06 15:53 ` Arjan van de Ven
2007-08-07 10:40 ` Manu Abraham
2007-08-07 12:45 ` Roman Zippel
2007-08-08 4:15 ` Arjan van de Ven
2007-08-09 19:31 ` Denis Vlasenko [this message]
2007-08-09 20:01 ` Denis Vlasenko
2007-08-07 19:40 ` Andrew Morton
2007-08-07 23:16 ` Roman Zippel
2007-08-07 23:29 ` Andrew Morton
2007-08-08 3:47 ` Roman Zippel
2007-08-08 4:14 ` Andrew Morton
2007-08-09 22:31 ` Roman Zippel
2007-08-08 11:55 ` Andi Kleen
2007-08-08 11:09 ` Manu Abraham
2007-08-08 11:52 ` Andi Kleen
2007-08-08 11:59 ` Manu Abraham
2007-08-09 7:16 ` Andrew Morton
2007-08-09 15:08 ` [linux-usb-devel] " Alan Stern
2007-11-28 10:29 ` Andrew Morton
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=1158166a0708091231r21903840mc927b6baa47e4598@mail.gmail.com \
--to=vda.linux@googlemail.com \
--cc=akpm@linux-foundation.org \
--cc=arjan@infradead.org \
--cc=corbet@lwn.net \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=tglx@linutronix.de \
--cc=zippel@linux-m68k.org \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).