Messages in this thread | | | Subject | Re: Memory hotplug softlock issue | From | Vlastimil Babka <> | Date | Mon, 19 Nov 2018 17:46:03 +0100 |
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On 11/19/18 5:46 PM, Michal Hocko wrote: > On Mon 19-11-18 17:36:21, Vlastimil Babka wrote: >> >> So what protects us from locking a page whose refcount dropped to zero? >> and is being freed? The checks in freeing path won't be happy about a >> stray lock. > > Nothing really prevents that. But does it matter. The worst that might > happen is that we lock a freed or reused page. Who would complain?
free_pages_check() for example
PAGE_FLAGS_CHECK_AT_FREE includes PG_locked
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