** Changed in: intel
Status: New => Fix Released
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https://bugs.launchpad.net/bugs/1645928
Title:
[Bug] (Purley) x86/hpet: Reduce HPET counter read contention
Status in intel:
Fix Released
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Yakkety:
Fix Released
Status in linux source package in Zesty:
Fix Released
Bug description:
Issue description:
Boot ubuntu 16.10 and upstream v4.8 kernel on Purley, sometimes we saw
following call trace:
[ 8.740679] hpet0: at MMIO 0xfed00000, IRQs 2, 8, 0, 0, 0, 0, 0, 0^M
[ 8.747701] hpet0: 8 comparators, 64-bit 24.000000 MHz counter^M
[ 32.765648] NMI watchdog: BUG: soft lockup - CPU#129 stuck for 22s!
[watchdog/129:913]^M
[ 32.779913] NMI watchdog: BUG: soft lockup - CPU#130 stuck for 22s!
[swapper/130:0]^M
[ 32.779915] Modules linked in:^M
[ 32.779918] CPU: 130 PID: 0 Comm: swapper/130 Not tainted
3.10.0-481.el7.x86_64 #1^M
[ 32.779919] Hardware name: Intel Corporation PURLEY/PURLEY, BIOS
PLYDCRB1.86B.0095.D20.1607292025 07/29/2016^M
[ 32.779921] task: ffff8830b3fb3ec0 ti: ffff8801738e0000 task.ti:
ffff8801738e0000^M
[ 32.779930] RIP: 0010:[<ffffffff8105feb6>] [<ffffffff8105feb6>]
native_safe_halt+0x6/0x10^M
[ 32.779932] RSP: 0000:ffff8801738e3e98 EFLAGS: 00000286^M
<snip>
(All cpus are stuck and NMI dump resulting in a large amount of
output.)
Issue solution:
v4.9 kernel has a commit to fix this issue, please backport it to 16.10:
f99fd22 x86/hpet: Reduce HPET counter read contention
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