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Tue, 16 Apr 2024 16:21:36 -0700 (PDT) Received: from localhost ([2620:10d:c090:400::5:6f51]) by smtp.gmail.com with ESMTPSA id t6-20020a056a00138600b006ecef9e9615sm9483775pfg.200.2024.04.16.16.21.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 16 Apr 2024 16:21:36 -0700 (PDT) Sender: Tejun Heo Date: Tue, 16 Apr 2024 13:21:34 -1000 From: Tejun Heo To: Linux regressions mailing list Cc: LKML , Bjorn Andersson Subject: Re: Bug 218665 - nohz_full=0 prevents kernel from booting Message-ID: References: <5be248c6-cdda-4d2e-8fae-30fc2cc124c0@leemhuis.info> <28c84b3b-f68f-4f45-8da1-9c3f9a342509@leemhuis.info> <7kugx5ivbplwwrcq5zp37djtpakl55b3pfy36gpbsbcx43dpcs@uheu6iv7gm7h> <81149f18-0132-4ace-8c71-1b75790a88e4@leemhuis.info> Precedence: bulk X-Mailing-List: regressions@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <81149f18-0132-4ace-8c71-1b75790a88e4@leemhuis.info> Hello, On Tue, Apr 16, 2024 at 08:08:07AM +0200, Linux regression tracking (Thorsten Leemhuis) wrote: > On 12.04.24 04:57, Bjorn Andersson wrote: > > On Wed, Apr 10, 2024 at 11:18:04AM +0200, Linux regression tracking (Thorsten Leemhuis) wrote: > >> On 08.04.24 00:52, Bjorn Andersson wrote: > >>> On Tue, Apr 02, 2024 at 10:17:16AM +0200, Linux regression tracking (Thorsten Leemhuis) wrote: > >>>> > >>>> Tejun, apparently it's cause by a change of yours. > >>>> Quoting from https://bugzilla.kernel.org/show_bug.cgi?id=218665 : > >>>> > >>>>> booting the current kernel (6.9.0-rc1, master/712e1425) on x86_64 > >>>>> with nohz_full=0 cause a page fault and prevents the kernel from > >>>>> booting. > >>> [...] > > Tejun, I got a bit lost here. Can you help me out please? > > I'm currently assuming that these two reports have the same cause: > https://lore.kernel.org/all/20240402105847.GA24832@redhat.com/T/#u > https://bugzilla.kernel.org/show_bug.cgi?id=218665 > > And that both will be fixed by this patch from Oleg Nesterov: > https://lore.kernel.org/lkml/20240411143905.GA19288@redhat.com/ > > But well, to me it looks like below issue from Bjorn is different, even > if it is caused by the same change -- nevertheless it looks like nobody > has looked into this since it was reported about two weeks ago. Or was > progress made and I just missed it? Can you elaborate why Bjorn's case is different? I was assuming it was the same problem and that Oleg's fixes would address the issue. Thanks. -- tejun