Date: Wed, 26 Feb 2025 03:10:35 +0000 From: bugzilla-noreply@freebsd.org To: virtualization@FreeBSD.org Subject: [Bug 279901] glibc-2.39-2 and above on the host segfault Message-ID: <bug-279901-27103-79raulXTQp@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-279901-27103@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=279901 --- Comment #65 from Koichiro Iwao <meta@FreeBSD.org> --- (In reply to Florian Weimer from comment #63) Let me sort out the remaining issues. 1TB L3 cache issue: - Addressed in glibc upstream - AlmaLinux 9.5 and Kitten 10 already include the upstream patch - Addressed also on bhyve side (temporary patch) However, the temporary bhyve patch broke glibc on AlmaLinux 8 / EL8 (glibc-2.28-251.el8_10.13). So the temporary patch for bhyve might have regression. This regression prevents the bhyve patch from being merged. The bhyve patch means here is the following: --- a/sys/amd64/vmm/x86.c +++ b/sys/amd64/vmm/x86.c @@ -152,6 +152,8 @@ x86_emulate_cpuid(struct vcpu *vcpu, uint64_t *rax, uint64_t *rbx, * pkg_id_shift and other OSes may rely on it. */ width = MIN(0xF, log2(threads * cores)); + if (width < 0x4) + width = 0; logical_cpus = MIN(0xFF, threads * cores - 1); regs[2] = (width << AMDID_COREID_SIZE_SHIFT) | logical_cpus; To reproduce the EL8 glibc issue, run the following command on PATCHED bhyve environment. $ podman run -it --rm quay.io/almalinuxorg/almalinux:8 /bin/bash $ podman run -it --rm quay.io/rockylinux/rockylinux:8 /bin/bash AlmaLinux doesn't have a8 branch for glibc package, so there are no AlmaLinux-specific patches. AlmaLinux's glibc and Rocky Linux's one are built from the same source. So what we need to do is, - Improve bhyve patch not to break EL8 glibc but fix EL9 glibc issue (1TB L3 cache issue) - Fix EL8 glibc issue in upstream if it is an upstream issue I will give you access for PATCHED bhyve environment if necessary. Send me your SSH public key. -- You are receiving this mail because: You are the assignee for the bug.home | help
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