Messages in this thread |  | | Date | Wed, 16 Aug 2017 13:17:32 +0200 | From | Michal Hocko <> | Subject | Re: [PATCH][RFC] PM / Hibernate: Feed NMI wathdog when creating snapshot |
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On Wed 16-08-17 00:01:08, Chen Yu wrote: > Hi Michal, > On Tue, Aug 15, 2017 at 02:41:19PM +0200, Michal Hocko wrote: [...] > > Moreover why don't you need to touch_nmi_watchdog in the loop over all > > pfns in the zone (right above this loop)? > As the NMI was triggered when checking the free_list rather than in the loop over > all pfns, it seems that the former has more possibility to catch a NMI if the > latter has already taken too much time. But yes, a safer way is to feed dog > in the latter too. I'll modify the code according to your suggestion.
This is a wrong approach IMHO. The whole thing has IRQ disabled.
-- Michal Hocko SUSE Labs
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