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[209.85.208.180]) by smtp.gmail.com with ESMTPSA id w3sm4656132ljm.0.2020.04.09.09.32.48 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 09 Apr 2020 09:32:49 -0700 (PDT) Received: by mail-lj1-f180.google.com with SMTP id n17so306212lji.8 for ; Thu, 09 Apr 2020 09:32:48 -0700 (PDT) X-Received: by 2002:a2e:8652:: with SMTP id i18mr370008ljj.265.1586449968616; Thu, 09 Apr 2020 09:32:48 -0700 (PDT) MIME-Version: 1.0 References: <20200408014010.80428-1-peterx@redhat.com> <20200408174732.bc448bbe41d190bfe5cc252e@linux-foundation.org> In-Reply-To: From: Linus Torvalds Date: Thu, 9 Apr 2020 09:32:32 -0700 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH 0/2] mm: Two small fixes for recent syzbot reports To: Dmitry Vyukov , Stephen Rothwell Cc: Andrew Morton , Peter Xu , LKML , Linux-MM Content-Type: text/plain; charset="UTF-8" X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Thu, Apr 9, 2020 at 5:55 AM Dmitry Vyukov wrote: > > linux-next is boot-broken for more than a month and bugs are piling > onto bugs, I've seen at least 3 different ones. > syzbot can't get any working linux-next build for testing for a very > long time now. Ouch. Ok, that's not good. It means that linux-next has basically only done build-testing this whole cycle. Stephen, Dmitry - is there some way linux-next could possibly kick out trees more aggressively if syzbot can't even boot? This merge window has seemed otherwise fairly smooth to me (famous last words), and it's really sad how the nice page fault cleanups ended up being such an ongoing pain when the problems _could_ have been caught earlier. We started to get syzbot reports very quickly after they got merged into my tree, so this is clearly something that gets exercised well - but it would have been oh-so-much better if it had gotten noticed in linux-next. Kicking trees out of linux-next and making noise if they cause syzbot failures might also make some maintainers react more.. Linus