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Code Issues Releases Activity

Change vm_page_sleep_if_busy() so that it no longer requires the caller to

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hold the page queues lock.
This commit is contained in:
Alan Cox 2006-08-06 00:15:40 +00:00
parent 3d0685834f
commit e74814b66a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=161013
1 changed files with 2 additions and 1 deletions
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3
sys/vm/vm_page.c
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@ -496,9 +496,10 @@ int
vm_page_sleep_if_busy(vm_page_t m, int also_m_busy, const char *msg)
{
mtx_assert(&vm_page_queue_mtx, MA_OWNED);
VM_OBJECT_LOCK_ASSERT(m->object, MA_OWNED);
if ((m->flags & PG_BUSY) || (also_m_busy && m->busy)) {
if (!mtx_owned(&vm_page_queue_mtx))
vm_page_lock_queues();
vm_page_flag_set(m, PG_WANTED | PG_REFERENCED);
vm_page_unlock_queues();