Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933230Ab3HGUyA (ORCPT ); Wed, 7 Aug 2013 16:54:00 -0400 Received: from mail-pb0-f42.google.com ([209.85.160.42]:51988 "EHLO mail-pb0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932387Ab3HGUx7 (ORCPT ); Wed, 7 Aug 2013 16:53:59 -0400 Date: Wed, 7 Aug 2013 13:53:57 -0700 From: Kent Overstreet To: Ben Hutchings Cc: Thomas Gleixner , linux-kernel@vger.kernel.org, Uwe =?utf-8?Q?Kleine-K=C3=B6nig?= Subject: Re: PREEMPT_RT vs bcache Message-ID: <20130807205357.GD11612@kmo-pixel> References: <1375907298.27403.35.camel@deadeye.wl.decadent.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1375907298.27403.35.camel@deadeye.wl.decadent.org.uk> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 721 Lines: 14 On Wed, Aug 07, 2013 at 10:28:18PM +0200, Ben Hutchings wrote: > As Kent said back in 2011 (commit 84759c6d18c5), bcache needs > {down,up}_read_non_owner(). But these are not implemented by the -rt > patchset when PREEMPT_RT_FULL is enabled. Can they be added, or is > there a fundamental conflict here? You should be able to cherry pick 84759c6d18c5144432781ddca037d929ee9db8a5 (Revert "rw_semaphore: remove up/down_read_non_owner") - that went in when bcache was merged. -- 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/