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Tue, 14 Jan 2025 00:08:27 -0800 (PST) X-Google-Smtp-Source: AGHT+IE2CqzmtEftGfIUSjBa6joYoMB6vjjjkFkszIxffsgA96yqTYdGfPzAOVjXCUrbcmCRBQs1pQ== X-Received: by 2002:a05:6a21:1807:b0:1e1:cd09:e08d with SMTP id adf61e73a8af0-1e88cfa6b83mr34048939637.11.1736842107014; Tue, 14 Jan 2025 00:08:27 -0800 (PST) Received: from omnibook.happyassassin.net ([2001:569:5316:e500:6db9:d886:b530:8752]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-72d4067e682sm6947764b3a.125.2025.01.14.00.08.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 14 Jan 2025 00:08:26 -0800 (PST) Message-ID: Subject: Re: Kernel crash while doing chroot'ed grub2-mkconfig on qemu-emulated Nehalem CPU since late November 6.13 snapshot From: Adam Williamson To: Mike Rapoport Cc: linux-kernel@vger.kernel.org, jforbes@redhat.com, mcgrof@kernel.org Date: Tue, 14 Jan 2025 00:08:25 -0800 In-Reply-To: References: <9a3c747052fb82274ab3c4a84eaf64c1273117ce.camel@redhat.com> <565d943ae51707002807d198b913bcd2f25a3ef5.camel@redhat.com> <358da653bcd8b7875f59e673e5572bddd3677aea.camel@redhat.com> <9cb0bdfc94643fb1544671837b357bc49800ce3f.camel@redhat.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.54.2 (3.54.2-1.fc41app1) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Mon, 2025-01-13 at 23:55 -0800, Adam Williamson wrote: > On Mon, 2025-01-13 at 11:16 -0800, Adam Williamson wrote: > > On Sun, 2025-01-12 at 10:47 -0800, Adam Williamson wrote: > > > >=20 > > > > I don't think that CPU flavour is important here. I'll greatly appr= eciate > > > > your testing. > > >=20 > > > Update - I tried doing a quick build yesterday but the patch doesn't > > > apply cleanly against our current Fedora Rawhide kernel. I'll look at > > > it again tomorrow. Sorry for the delay. > >=20 > > OK, I've got a test build working now. Looks like `struct execmem_area > > *area;` is not in Linus' current tree, I guess it's from your branch or > > something? Fortunately I just had to drop that line from the patch and > > it applies fine. >=20 > OK, so good news: initial testing of that patch (the > `get_vm_area_page_order(vm) + PAGE_SHIFT` one) looks good. I've run it > through 40 installs so far without a hang. Just as a sanity check, I > also ran the non-patched kernel through 10 installs on the same openQA > instance and it hung four times. >=20 > I'll run some more cycles tomorrow to be sure, but it looks good. > Thanks! BTW, I took a few minutes to look through a bunch of the failures, and noticed that all the ones I checked seem to be on Xeon Gold 5218 or Xeon Gold 6130 hosts. The older Xeon E5-2683v4 and Xeon E5-2680 hosts don't seem to have any failures. Not sure if that's interesting/useful, but thought I'd mention it. --=20 Adam Williamson (he/him/his) Fedora QA Fedora Chat: @adamwill:fedora.im | Mastodon: @adamw@fosstodon.org https://www.happyassassin.net