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[31.46.244.62]) by smtp.gmail.com with ESMTPSA id e14-20020a50ec8e000000b00509d1c6dcefsm1347783edr.13.2023.05.26.01.50.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 26 May 2023 01:50:55 -0700 (PDT) Date: Fri, 26 May 2023 10:50:50 +0200 From: Ingo Molnar To: Peter Zijlstra Subject: Re: linux-next: boot failure after merge of the tip tree Message-ID: References: <20230524154459.48cda184@canb.auug.org.au> <20230524093454.GI4253@hirez.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230524093454.GI4253@hirez.programming.kicks-ass.net> X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Stephen Rothwell , Linux Kernel Mailing List , Linux Next Mailing List , "H. Peter Anvin" , Thomas Gleixner , PowerPC , Ingo Molnar Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" * Peter Zijlstra wrote: > On Wed, May 24, 2023 at 03:44:59PM +1000, Stephen Rothwell wrote: > > Hi all, > > > > After merging the tip tree, today's linux-next build (powerpc > > pseries_le_defconfig) failed to boot like this: > > > > Built 1 zonelists, mobility grouping on. Total pages: 32736 > > Policy zone: Normal > > mem auto-init: stack:all(zero), heap alloc:off, heap free:off > > Memory: 2027392K/2097152K available (17984K kernel code, 3328K rwdata, 14784K rodata, 6080K init, 1671K bss, 69760K reserved, 0K cma-reserved) > > > > *crickets* > > > > Bisected to commit > > > > f4ab23558310 ("slub: Replace cmpxchg_double()") > > > > I have reverted that commit (and the following one) for today. > > Sorry about that; turns out I forgot to test the case where cmpxchg128 > wasn't available. > > Please see: > > https://lkml.kernel.org/r/20230524093246.GP83892@hirez.programming.kicks-ass.net > > As stated there, I'm going to zap tip/locking/core for a few days and > let this fixed version run through the robots again before re-instating > it. Note to -next, this should now be resolved in the tip:auto-latest branch. Thanks, Ingo