From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ingo Molnar Date: Thu, 28 Feb 2008 19:32:33 +0000 Subject: Re: 2.6.25-rc2-mm1 - boot hangs on ia64 Message-Id: <20080228193233.GA26735@elte.hu> List-Id: References: <20080227103831.423F.KOSAKI.MOTOHIRO@jp.fujitsu.com> <20080227071118.GA4638@elte.hu> <20080228192509.BDCF.KOSAKI.MOTOHIRO@jp.fujitsu.com> <20080228115041.GA22082@elte.hu> <20080228101343.1b9548e6.akpm@linux-foundation.org> <20080228191214.GA17872@elte.hu> <20080228112423.fed6add2.akpm@linux-foundation.org> In-Reply-To: <20080228112423.fed6add2.akpm@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Andrew Morton Cc: kosaki.motohiro@jp.fujitsu.com, srostedt@redhat.com, Lee.Schermerhorn@hp.com, linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org, tony.luck@intel.com, mingo@redhat.com, bob.picco@hp.com, eric.whitney@hp.com * Andrew Morton wrote: > > > I don't think we shoudl have added that hack in the first place. > > > It solves a problem which about three developers hit four times in > > > five years but it has made kernel logging less reliable for > > > everyone. > > > > well, the problem was ia64, not a problem on x86 or other platforms. > > I am referring to the original change which made klogd wakeups > unreliable. oh, indeed - agreed - i missed the fact that is_locked check is sporadic and can cause other CPUs to prevent the wakeup of klogd. I've zapped the change. Ingo