From: Arnd Bergmann <arnd@arndb.de>
To: "Luck, Tony" <tony.luck@intel.com>
Cc: Matthew Wilcox <matthew@wil.cx>,
Nick Piggin <nickpiggin@yahoo.com.au>,
Stephen Rothwell <sfr@canb.auug.org.au>,
linux-arch@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: down_spin() implementation
Date: Sat, 29 Mar 2008 00:48:21 +0100 [thread overview]
Message-ID: <200803290048.22931.arnd@arndb.de> (raw)
In-Reply-To: <1FE6DD409037234FAB833C420AA843ECF237C0@orsmsx424.amr.corp.intel.com>
On Friday 28 March 2008, Luck, Tony wrote:
> > So it makes little sense to add this to semaphores. Better to introduce
> > a spinaphore, as you say.
>
> > struct {
> > atomic_t cur;
> > int max;
> > } ss_t;
>
> Could this API sneak into the bottom of one or the other of
> linux/include/{spinlock,semaphore}.h ... or should it get its own
> spinaphore.h file?
>
> Or should I follow Alan's earlier advice and keep this as an ia64
> only thing (since I'll be the only user).
If you use the simple version suggested last by Willy, I think it
could even be open-coded in your TLB management code.
Should we decided to make it an official interface, I'd suggest
putting it into atomic.h, because it operates on a plain atomic_t.
Arnd <><
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2008-03-28 23:48 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-25 20:49 What if a TLB flush needed to sleep? Luck, Tony
2008-03-25 21:47 ` Alan Cox
2008-03-26 12:32 ` Matthew Wilcox
2008-03-26 20:29 ` Luck, Tony
2008-03-27 8:09 ` Jens Axboe
2008-03-27 14:15 ` down_spin() implementation Matthew Wilcox
2008-03-28 0:01 ` Nick Piggin
2008-03-28 12:45 ` Matthew Wilcox
2008-03-28 21:16 ` Luck, Tony
2008-03-28 23:48 ` Arnd Bergmann [this message]
[not found] ` <20080328124517.GQ16721-6jwH94ZQLHl74goWV3ctuw@public.gmane.org>
2008-03-29 1:04 ` Nick Piggin
2008-03-28 4:51 ` Stephen Rothwell
2008-03-28 5:03 ` Nick Piggin
2008-03-28 12:46 ` Matthew Wilcox
2008-03-28 12:51 ` Jens Axboe
2008-03-28 13:17 ` Matthew Wilcox
2008-03-28 13:24 ` Jens Axboe
2008-03-26 19:25 ` What if a TLB flush needed to sleep? Christoph Lameter
2008-03-26 20:29 ` Thomas Gleixner
2008-03-27 1:19 ` Christoph Lameter
2008-03-27 13:20 ` Peter Zijlstra
2008-03-27 18:44 ` Christoph Lameter
2008-03-28 9:59 ` Peter Zijlstra
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=200803290048.22931.arnd@arndb.de \
--to=arnd@arndb.de \
--cc=linux-arch@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=matthew@wil.cx \
--cc=nickpiggin@yahoo.com.au \
--cc=sfr@canb.auug.org.au \
--cc=tony.luck@intel.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox