From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Arjan van de Ven <arjan@infradead.org>
Cc: Matti Linnanvuori <mattilinnanvuori@yahoo.com>,
linux-kernel@vger.kernel.org
Subject: Re: Do not deprecate binary semaphore or do allow mutex in software interrupt contexts
Date: Tue, 11 Sep 2007 14:56:22 +0100 [thread overview]
Message-ID: <20070911145622.0a37bbda@the-village.bc.nu> (raw)
In-Reply-To: <20070911153628.26ca02bc@laptopd505.fenrus.org>
> to be honest, the scenario describe really smells of broken locking, in
> fact it really sounds like it wants to use spinlocks instead
For polling and timer based code its often simpler to do
del_timer_sync(&my_timer);
FrobStuff
add_timer(&my_timer);
especially if "FrobStuff" is likely to change when you next need to poll.
And don't forget regular polling is a good way to really annoy laptop
users as it burns power
Alan
next prev parent reply other threads:[~2007-09-11 13:48 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-11 13:20 Do not deprecate binary semaphore or do allow mutex in software interrupt contexts Matti Linnanvuori
2007-09-11 14:36 ` Arjan van de Ven
2007-09-11 13:56 ` Alan Cox [this message]
-- strict thread matches above, loose matches on Subject: below --
2007-09-11 16:20 Matti Linnanvuori
2007-09-11 16:50 ` Peter Zijlstra
2007-09-11 18:22 ` Arjan van de Ven
2007-09-11 17:29 Matti Linnanvuori
2007-09-11 19:22 ` Arjan van de Ven
2007-09-12 5:39 Matti Linnanvuori
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=20070911145622.0a37bbda@the-village.bc.nu \
--to=alan@lxorguk.ukuu.org.uk \
--cc=arjan@infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mattilinnanvuori@yahoo.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