Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932237AbbGCOh1 (ORCPT ); Fri, 3 Jul 2015 10:37:27 -0400 Received: from sauhun.de ([89.238.76.85]:35712 "EHLO pokefinder.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755422AbbGCOhS (ORCPT ); Fri, 3 Jul 2015 10:37:18 -0400 Date: Fri, 3 Jul 2015 16:37:03 +0200 From: Wolfram Sang To: Thomas Gleixner Cc: Simon Horman , Kevin Hilman , Tyler Baker , Borislav Petkov , Geert Uytterhoeven , Magnus Damm , linux-sh@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: Possible regression due to "tick: broadcast: Prevent livelock from event handler" Message-ID: <20150703143703.GB19284@katana> References: <20150703024044.GB24695@verge.net.au> <20150703105441.GF1521@katana> <20150703133245.GA19284@katana> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="H1spWtNR+x+ondvy" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1846 Lines: 56 --H1spWtNR+x+ondvy Content-Type: text/plain; charset=us-ascii Content-Disposition: inline > So this is a single core machine and uses the em_sti timer w/o the > broadcast nonsense. In Simons case it looks like em_sti is used as > broadcast device. We use the same board. Just my kernel has SMP=n. > Though the issues you see in the highres=n case might be the same as > the ones Simon is observing. I hope so. One good thing about the issue I see is that it is 100% reproducable. > So in that nohz=y highres=n case, does adding idle=poll on the command > line fix the issue? Nope, still hangs. Thanks for assisting! Wolfram --H1spWtNR+x+ondvy Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAEBAgAGBQJVlp4PAAoJEBQN5MwUoCm2SRwP/iJfH4B8voNDd+FCf3hPe29w iPFrvGk2QNgHdc0bQajcnjiLQCYJtKRmrOvOXlTX014Jk02B6LDIVmFRve9g2ORk duvSEuWjq/yC+XcwTw39fBHj1VD1M3LGPW7P+nDHKZ1XpxYssBHwM9LUm5C6ByeU srRVkkZ2oov4ibkWj+cFuhqx4VZI0wsFeM8qgAKoMVTjPRXbBh4ZNhxbb/l8wILJ g8bIxB9eB6XNBK66MtShyYZiGPcRGxdMeDJRY/otr1HUILWgJosX/PLYdhIZUiew gCGIkj12WuXgVP7LpbCVRN8CBVyilVklWa8REpGkiyfXQ/pPjYQeZHYI8igzVcrl TZUEi7yF7lXGP7CYXxLyFxuHwHqjoahdsK/z8a+3YZSF+jTnaUMRtbmKV9yExoY4 bRE4lJeqyMT7QG8bKuJ/4PYpLRc4MC4assavTVCnoeSwJbIMFwqLHfGm96EZgFB7 G4kVpOcDNAHuksremVcxGvRajV6taqD/kAOobyQ2J8GGVuoSYc5ER67PLy/hvqZ7 fKSnmRbKby7QqMnoVFj0i2/j8w5Ge4q6JHeSIfpV0X9bIGScwEhUgnXFZj0Shx8h pB0SiGI+fYPnH0Wj3ySOT/mJSikutRBfcO8K4GEUJoR8ow9fL2CTdWh6h8b+uvMl pXlNFIxvi9k4wbANGTza =JAxF -----END PGP SIGNATURE----- --H1spWtNR+x+ondvy-- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/