All of lore.kernel.org
 help / color / mirror / Atom feed
From: Jan Kiszka <jan.kiszka@domain.hid>
To: xenomai-core <xenomai@xenomai.org>
Subject: [Xenomai-core] Fast native mutexes vs. RT_MUTEX_INFO.lockcnt
Date: Mon, 25 Aug 2008 17:37:40 +0200	[thread overview]
Message-ID: <48B2D1C4.5010306@domain.hid> (raw)

Hi,

next issue on my way towards fast native mutexes: as mutexes are now
mostly acquired in user space, the recursion counter lockcnt will only
be maintained in the context of the owning thread (at best: its process)
in user space. No update on the kernel-side lockcnt will take place
anymore, thus rt_mutex_inquire can only return 0 or 1, no > 1. Is it OK
to break the ABI here?

Jan

-- 
Siemens AG, Corporate Technology, CT SE 2
Corporate Competence Center Embedded Linux


             reply	other threads:[~2008-08-25 15:37 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-08-25 15:37 Jan Kiszka [this message]
2008-08-25 16:43 ` [Xenomai-core] Fast native mutexes vs. RT_MUTEX_INFO.lockcnt Philippe Gerum
2008-08-25 16:45   ` Jan Kiszka
2008-08-25 16:53     ` Philippe Gerum
2008-08-25 16:55       ` Jan Kiszka
2008-08-25 16:51   ` Jan Kiszka

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=48B2D1C4.5010306@domain.hid \
    --to=jan.kiszka@domain.hid \
    --cc=xenomai@xenomai.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 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.