Author: markj
Date: Thu Nov 7 18:26:29 2019
New Revision: 354461
URL: https://svnweb.freebsd.org/changeset/base/354461
Log:
Drop Giant before sleeping on a busy page.
Before the page busy code was converted to make direct use of
sleepqueues, this was handled by _sleep().
Reported by: glebius
Reviewed by: kib
Sponsored by: The FreeBSD Foundation
Modified:
head/sys/vm/vm_page.c
Modified: head/sys/vm/vm_page.c
==============================================================================
--- head/sys/vm/vm_page.c Thu Nov 7 18:26:01 2019 (r354460)
+++ head/sys/vm/vm_page.c Thu Nov 7 18:26:29 2019 (r354461)
@@ -1053,8 +1053,10 @@ _vm_page_busy_sleep(vm_object_t obj, vm_page_t m, cons
}
if (locked)
VM_OBJECT_DROP(obj);
+ DROP_GIANT();
sleepq_add(m, NULL, wmesg, 0, 0);
sleepq_wait(m, PVM);
+ PICKUP_GIANT();
}
/*
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