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Open Source and information security mailing list archives
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Date: Thu, 25 Mar 2010 16:36:08 +1100 From: Nick Piggin <npiggin@...e.de> To: Peter Zijlstra <peterz@...radead.org> Cc: Jan Kara <jack@...e.cz>, Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org, linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [rfc][patch] mm: lockdep page lock On Wed, Mar 24, 2010 at 02:28:11PM +0100, Peter Zijlstra wrote: > On Tue, 2010-03-16 at 13:21 +1100, Nick Piggin wrote: > > > > > > Agreed (btw. Peter is there any way to turn lock debugging back on? > > it's annoying when cpufreq hotplug code or something early breaks and > > you have to reboot in order to do any testing). > > Not really, the only way to do that is to get the full system back into > a known (zero) lock state and then fully reset the lockdep state. > > It might be possible using the freezer, but I haven't really looked at > that, its usually simpler to simply fix the offending code or simply not > build it in your kernel. Right, but sometimes that is not possible (or you don't want to turn off cpufreq). I guess you could have an option to NOT turn it off in the first place. You could just turn off warnings, but leave everything else running, couldn't you? And then the option would just be to turn the printing back on. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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