From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 97F8525CC47 for ; Fri, 2 May 2025 16:12:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746202363; cv=none; b=t42GxfDNzKHfm9Jz/9ziienMc+C8LuX/Fpy+EAG8GOYXQWr999JPiPfgonJjkArYDzFYCx+BUB+xalRffW/GQwbwULORbv3uJiic2e41sL8eTLtKFPJz6aOfhdI5dtwC79tHjrHHVSw2KQceULkazQCG0t5gHZLXk8sBxpexAbE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746202363; c=relaxed/simple; bh=+7hrKx0V2lZqrqFis5HfAqMkw8lhrUTVDcMnNu8N54g=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=PHgVqHB9vwSbhHVy3xhVokcNUHVytKvNTR7zkXfOQRJXdacs8yUw9QFU2o1PFyd7N9OWgmxaYjCJL7gGfFPpKLcB8EbvbeUv6diroA310FW0jmyFmRYXlRjYGG4YCDVWXzBI+tGT2cvAcieMEJyW2Y1zlQvovPdG+nsUYJSsAfo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=kvmRv1m7; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="kvmRv1m7" Received: by smtp.kernel.org (Postfix) with ESMTPS id 283BFC4CEEE for ; Fri, 2 May 2025 16:12:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1746202362; bh=+7hrKx0V2lZqrqFis5HfAqMkw8lhrUTVDcMnNu8N54g=; h=From:To:Subject:Date:In-Reply-To:References:From; b=kvmRv1m7s2c6jtdf1UaQffsnfkYafpesnR25qRU4t1uoObLSxbnWoyET5UJJKwF0r DspiGvyQrgYJExBSF/a3t1snMdQsEB2wUp4dAltZyQwT3Nary8VVxxphHCQZYffA5x mLVxvP/hwDRMMqqW4V75b0Q0V4kLXTlUi/HX34SsPsFOdUuJtQoRiqS+Ms1DmQ1GIi rnEV23jXQ1ay9yYtba630T2ObAzhNXEVVQSsufSv6OKKeN7zRrryeRBCz6zn9qqTKr S+AQHplw3t2unIJNR0ax0VKFAaOa2AZzEGllfKogI0UvAP+JEyPtVB1X51l7KMIB97 SkWCgHi4hucow== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id 222B9C41612; Fri, 2 May 2025 16:12:42 +0000 (UTC) From: bugzilla-daemon@kernel.org To: kvm@vger.kernel.org Subject: [Bug 220057] Kernel regression. Linux VMs crashing (I did not test Windows guest VMs) Date: Fri, 02 May 2025 16:12:41 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: AssignedTo virtualization_kvm@kernel-bugs.osdl.org X-Bugzilla-Product: Virtualization X-Bugzilla-Component: kvm X-Bugzilla-Version: unspecified X-Bugzilla-Keywords: X-Bugzilla-Severity: blocking X-Bugzilla-Who: alex.williamson@redhat.com X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: virtualization_kvm@kernel-bugs.osdl.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: attachments.created Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 https://bugzilla.kernel.org/show_bug.cgi?id=3D220057 --- Comment #44 from Alex Williamson (alex.williamson@redhat.com) --- Created attachment 308071 --> https://bugzilla.kernel.org/attachment.cgi?id=3D308071&action=3Dedit align faults Please test this as a potential fix. It includes the debugging from last t= ime, so you'll want to unapply that first to get to a clean 6.14.4 base. The theory here is that we might be getting a VM_FAULT_OOM due to a race ra= ther than an actual -ENOMEM condition, and while the mm should interpret the fai= lure differently and handle it, we might avoid the race and use the page table m= ore efficiently in this scenario if we actively align mappings to create huge p= ages rather than deferring non-huge aligned faults to smaller mappings. Please report results and also attach dmesg with logging for additional confirmation. Thanks --=20 You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.=