From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gregory Haskins Subject: Re: [PATCH 1/2] [RT] hrtimers stuck in waitqueue Date: Tue, 19 Aug 2008 10:10:21 -0400 Message-ID: <48AAD44D.8050000@novell.com> References: <1219070552-30783-1-git-send-email-gilles.carry@bull.net> <1219070552-30783-2-git-send-email-gilles.carry@bull.net> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig9DBB976533D7826988E5E73F" Cc: linux-rt-users@vger.kernel.org, tglx@linutronix.de, mingo@elte.hu, tinytim@us.ibm.com, jean-pierre.dion@bull.net, sebastien.dugue@bull.net To: Gilles Carry Return-path: Received: from victor.provo.novell.com ([137.65.250.26]:36253 "EHLO victor.provo.novell.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753198AbYHSOMn (ORCPT ); Tue, 19 Aug 2008 10:12:43 -0400 In-Reply-To: <1219070552-30783-2-git-send-email-gilles.carry@bull.net> Sender: linux-rt-users-owner@vger.kernel.org List-ID: This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig9DBB976533D7826988E5E73F Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable Hi Gilles, Gilles Carry wrote: > This patch makes hrtimers initialized with hrtimer_init_sleeper > to use another mode and then not be stuck in waitqueues when > hrtimer_interrupt is very busy. > =20 Not sure if this is related, but I just posted a patch to fix a=20 condition where hrtimer_interrupt could get artificially busy for *very* = long periods of time (I observed 500ms). http://article.gmane.org/gmane.linux.rt.user/3357 This bug was specific to 26-rt1. Did you investigate the cause of the=20 busy hrtimer_interrupt? If not, its possible that your issue would be=20 indirectly fixed now that the HRT subsystem doesn't spike-out like=20 that. Or do you believe these are orthogonal issues and we should still = protect against non-pathological cases of hrtimer_interrupt running hot? Regards, -Greg --------------enig9DBB976533D7826988E5E73F Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.9 (GNU/Linux) Comment: Using GnuPG with SUSE - http://enigmail.mozdev.org iEYEARECAAYFAkiq1E0ACgkQlOSOBdgZUxmOXQCfb8yOHd4a9ryIWJ0IfVZVT2s2 3TkAn3Du5AkbtUHQjPLWFlKbmh6/SNoA =53km -----END PGP SIGNATURE----- --------------enig9DBB976533D7826988E5E73F--