Date: Fri, 13 Dec 2024 20:13:00 +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-KRVAmFYMwl@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-279901-27103@https.bugs.freebsd.org/bugzilla/> References: <bug-279901-27103@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D279901 Mark Peek <mp@FreeBSD.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |mp@FreeBSD.org --- Comment #29 from Mark Peek <mp@FreeBSD.org> --- (In reply to Darren Henderson from comment #28) The glibc changes indicated in this bug were specific to amd. I have tried numerous times to reproduce this issue on intel systems but have not seen it occur. Sadly I don't have an applicable AMD systems to test on. Here's my arch install as a bhyve guest: $ uname -a Linux archlinux 6.12.4-arch1-1 #1 SMP PREEMPT_DYNAMIC Mon, 09 Dec 2024 14:3= 1:57 +0000 x86_64 GNU/Linux $ ld.so --list-diagnostics | grep -e version.version version.version=3D"2.40" Given some of the ld.so output in previous updates to this bug, I did a dif= f to try to find the x86 tunable changes between them. 43c40 < version.version=3D"2.36" --- > version.version=3D"2.40" 189,191c196,199 < x86.cpu_features.rep_movsb_threshold=3D0x2000 < x86.cpu_features.rep_movsb_stop_threshold=3D0x80000 < x86.cpu_features.rep_stosb_threshold=3D0x800 --- > x86.cpu_features.memset_non_temporal_threshold=3D0xc000000000 > x86.cpu_features.rep_movsb_threshold=3D0x0 > x86.cpu_features.rep_movsb_stop_threshold=3D0xc000000000 > x86.cpu_features.rep_stosb_threshold=3D0xffffffffffffffff Running binaries with this environment set, so the intel system would run t= he same code path in glibc as amd would, did not cause the issue on my intel system. GLIBC_TUNABLES=3D"glibc.cpu.x86_memset_non_temporal_threshold=3D0xc00000000= 0:glibc.cpu.x86_rep_movsb_threshold=3D0x0:glibc.cpu.x86_rep_movsb_stop_thre= shold=3D0xc000000000:glibc.cpu.x86_rep_stosb_threshold=3D0xffffffffffffffff" If anyone has seen it on intel, it would be great to have the repro steps a= dded to this bug. --=20 You are receiving this mail because: You are the assignee for the bug.=
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