Re: [RFC PATCH] mm: kasan: suppress soft lockup in slub when !CONFIG_PREEMPT

2017-12-11 Thread Yang Shi
On 12/8/17 1:16 AM, Andrey Ryabinin wrote: On 12/08/2017 11:26 AM, Dmitry Vyukov wrote: On Fri, Dec 8, 2017 at 12:40 AM, Matthew Wilcox wrote: On Fri, Dec 08, 2017 at 07:30:07AM +0800, Yang Shi wrote: When running stress test with KASAN enabled, the below softlockup may happen occasionally:

Re: [RFC PATCH] mm: kasan: suppress soft lockup in slub when !CONFIG_PREEMPT

2017-12-08 Thread Andrey Ryabinin
On 12/08/2017 11:26 AM, Dmitry Vyukov wrote: > On Fri, Dec 8, 2017 at 12:40 AM, Matthew Wilcox wrote: >> On Fri, Dec 08, 2017 at 07:30:07AM +0800, Yang Shi wrote: >>> When running stress test with KASAN enabled, the below softlockup may >>> happen occasionally: >>> >>> NMI watchdog: BUG: soft lock

Re: [RFC PATCH] mm: kasan: suppress soft lockup in slub when !CONFIG_PREEMPT

2017-12-08 Thread Dmitry Vyukov
On Fri, Dec 8, 2017 at 12:40 AM, Matthew Wilcox wrote: > On Fri, Dec 08, 2017 at 07:30:07AM +0800, Yang Shi wrote: >> When running stress test with KASAN enabled, the below softlockup may >> happen occasionally: >> >> NMI watchdog: BUG: soft lockup - CPU#7 stuck for 22s! >> hardirqs last enabled

Re: [RFC PATCH] mm: kasan: suppress soft lockup in slub when !CONFIG_PREEMPT

2017-12-07 Thread Matthew Wilcox
On Fri, Dec 08, 2017 at 07:30:07AM +0800, Yang Shi wrote: > When running stress test with KASAN enabled, the below softlockup may > happen occasionally: > > NMI watchdog: BUG: soft lockup - CPU#7 stuck for 22s! > hardirqs last  enabled at (0): [<          (null)>]      (null) > hardirqs last disab