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Restore a vm_page_wired() check in vm_page_mvqueue() after r356156.

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We now set PGA_DEQUEUE on a managed page when it is wired after
allocation, and vm_page_mvqueue() ignores pages with this flag set,
ensuring that they do not end up in the page queues.  However, this is
not sufficient for managed fictitious pages or pages managed by the
TTM.  In particular, the TTM makes use of the plinks.q queue linkage
fields for its own purposes.

PR:	242961
Reported and tested by:	Greg V <greg@unrelenting.technology>
This commit is contained in:
Mark Johnston 2019-12-29 20:01:03 +00:00
parent cfdb91850c
commit 758b2c02bb
1 changed files with 1 additions and 1 deletions
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2
sys/vm/vm_page.c
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@ -4010,7 +4010,7 @@ vm_page_mvqueue(vm_page_t m, const uint8_t nqueue, const uint16_t nflag)
KASSERT(nflag == PGA_REQUEUE || nflag == PGA_REQUEUE_HEAD,
("%s: invalid flags %x", __func__, nflag));
if ((m->oflags & VPO_UNMANAGED) != 0)
if ((m->oflags & VPO_UNMANAGED) != 0 || vm_page_wired(m))
return;
old = vm_page_astate_load(m);