Your message dated Sun, 07 Feb 2016 22:43:10 +0000 with message-id <E1aSY2w-0006LQ-7t@deadeye> and subject line Closing bugs assigned to linux-2.6 package has caused the Debian Bug report #733043, regarding linux-2.6: warm reboot on XeonE5 machine finally hang up (after 208.5 days) to be marked as done.
This means that you claim that the problem has been dealt with. If this is not the case it is now your responsibility to reopen the Bug report if necessary, and/or fix the problem forthwith. (NB: If you are a system administrator and have no idea what this message is talking about, this may indicate a serious mail system misconfiguration somewhere. Please contact ow...@bugs.debian.org immediately.) -- 733043: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=733043 Debian Bug Tracking System Contact ow...@bugs.debian.org with problems
--- Begin Message ---Package: linux-2.6 Version: 2.6.32-48squeeze4 Severity: important Tags: fixed-upstream, patch Xeon E5 has a bug, it doesn't reset TSC on warm reboot, just keep it instead. see "BT81. X X X No Fix TSC is Not Affected by Warm Reset" http://www.intel.com/content/dam/www/public/us/en/documents/specification-updates/xeon-e5-family-spec-update.pdf And also kernel 2.6.32 has a bug. Xeon bug + kernel bug = hung after warm reboot (or kexec) after 208.5 days since booting. So, administrators should shutdown it once at all, then boot it again because "shutdown -r" causes hang up. Red Hat has released a fix for this as kernel 2.6.32-220, 2.6.32-279 and 2.6.32-358 series (RHEL6.x) https://access.redhat.com/site/solutions/433883 (for detail subscriber only :-( Attached patch is based on upstream patch. see http://kernel.opensuse.org/cgit/kernel/patch/?id=9993bc635d01a6ee7f6b833b4ee65ce7c06350b1 Please look into it and update. Thanks. -- Regards, Hideki Yamane henrich @ debian.or.jp/org http://wiki.debian.org/HidekiYamanediff -urN linux-2.6-2.6.32.orig/debian/changelog linux-2.6-2.6.32/debian/changelog --- linux-2.6-2.6.32.orig/debian/changelog 2013-12-24 22:24:17.000000000 +0900 +++ linux-2.6-2.6.32/debian/changelog 2013-12-24 22:32:19.833691711 +0900 @@ -1,3 +1,12 @@ +linux-2.6 (2.6.32-48squeeze4.1) UNRELEASED; urgency=medium + + [ Hideki Yamane ] + * Non-maintainer upload. + * "sched/x86: Fix overflow in cyc2ns_offset" from upstream git. + It avoids hung up after reboot on Xeon E5 that spends 208.5 days + + -- Hideki Yamane <henr...@debian.org> Tue, 24 Dec 2013 22:09:52 +0900 + linux-2.6 (2.6.32-48squeeze4) squeeze-security; urgency=high [ Ian Campbell ] diff -urN linux-2.6-2.6.32.orig/debian/patches/bugfix/x86/sched_x86_Fix_overflow_in_cyc2ns_offset.patch linux-2.6-2.6.32/debian/patches/bugfix/x86/sched_x86_Fix_overflow_in_cyc2ns_offset.patch --- linux-2.6-2.6.32.orig/debian/patches/bugfix/x86/sched_x86_Fix_overflow_in_cyc2ns_offset.patch 1970-01-01 09:00:00.000000000 +0900 +++ linux-2.6-2.6.32/debian/patches/bugfix/x86/sched_x86_Fix_overflow_in_cyc2ns_offset.patch 2013-12-24 22:29:56.117656579 +0900 @@ -0,0 +1,51 @@ +commit 9993bc635d01a6ee7f6b833b4ee65ce7c06350b upstream. + +diff -urN linux-2.6-2.6.32/arch/x86/include/asm/timer.h linux-2.6-2.6.32.fixed/arch/x86/include/asm/timer.h +--- linux-2.6-2.6.32/arch/x86/include/asm/timer.h 2009-12-03 12:51:21.000000000 +0900 ++++ linux-2.6-2.6.32.fixed/arch/x86/include/asm/timer.h 2013-12-24 22:09:10.930488157 +0900 +@@ -49,7 +49,8 @@ + { + int cpu = smp_processor_id(); + unsigned long long ns = per_cpu(cyc2ns_offset, cpu); +- ns += cyc * per_cpu(cyc2ns, cpu) >> CYC2NS_SCALE_FACTOR; ++ ns += mult_frac(cyc, per_cpu(cyc2ns, cpu), ++ (1UL << CYC2NS_SCALE_FACTOR)); + return ns; + } + +diff -urN linux-2.6-2.6.32/arch/x86/kernel/tsc.c linux-2.6-2.6.32.fixed/arch/x86/kernel/tsc.c +--- linux-2.6-2.6.32/arch/x86/kernel/tsc.c 2009-12-03 12:51:21.000000000 +0900 ++++ linux-2.6-2.6.32.fixed/arch/x86/kernel/tsc.c 2013-12-24 22:04:41.441744936 +0900 +@@ -619,7 +619,8 @@ + + if (cpu_khz) { + *scale = (NSEC_PER_MSEC << CYC2NS_SCALE_FACTOR)/cpu_khz; +- *offset = ns_now - (tsc_now * *scale >> CYC2NS_SCALE_FACTOR); ++ *offset = ns_now - mult_frac(tsc_now, *scale, ++ (1UL << CYC2NS_SCALE_FACTOR)); + } + + sched_clock_idle_wakeup_event(0); +diff -urN linux-2.6-2.6.32/include/linux/kernel.h linux-2.6-2.6.32.fixed/include/linux/kernel.h +--- linux-2.6-2.6.32/include/linux/kernel.h 2009-12-03 12:51:21.000000000 +0900 ++++ linux-2.6-2.6.32.fixed/include/linux/kernel.h 2013-12-24 22:04:41.441744936 +0900 +@@ -55,6 +55,19 @@ + } \ + ) + ++/* ++ * Multiplies an integer by a fraction, while avoiding unnecessary ++ * overflow or loss of precision. ++ */ ++#define mult_frac(x, numer, denom)( \ ++{ \ ++ typeof(x) quot = (x) / (denom); \ ++ typeof(x) rem = (x) % (denom); \ ++ (quot * (numer)) + ((rem * (numer)) / (denom)); \ ++} \ ++) ++ ++ + #define _RET_IP_ (unsigned long)__builtin_return_address(0) + #define _THIS_IP_ ({ __label__ __here; __here: (unsigned long)&&__here; }) + diff -urN linux-2.6-2.6.32.orig/debian/patches/series/48squeeze4.1 linux-2.6-2.6.32/debian/patches/series/48squeeze4.1 --- linux-2.6-2.6.32.orig/debian/patches/series/48squeeze4.1 1970-01-01 09:00:00.000000000 +0900 +++ linux-2.6-2.6.32/debian/patches/series/48squeeze4.1 2013-12-24 22:31:43.449682015 +0900 @@ -0,0 +1 @@ ++ bugfix/x86/sched_x86_Fix_overflow_in_cyc2ns_offset.patch
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--- Begin Message ---Version: 3.4.1-1~experimental.1+rm Debian 6.0 Long Term Support has now ended, and the 'linux-2.6' source package will no longer be updated. This bug is being closed on the assumption that it does not affect the kernel versions in newer Debian releases. If you can still reproduce this bug in a newer release, please reopen the bug report and reassign it to 'src:linux' and the affected version of the package. You can find the package version for the running kernel by running: uname -v or the versions of all installed kernel packages by running: dpkg -l 'linux-image-[34]*' | grep ^.i and looking at the third column. I apologise that we weren't able to provide a specific resolution for this bug. Ben. -- Ben Hutchings - Debian developer, member of Linux kernel and LTS teams
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