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vm_page_busy() no longer requires the page queues lock to be held. Reduce

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the scope of the page queues lock in vm_fault() accordingly.
This commit is contained in:
Alan Cox 2007-03-23 06:11:25 +00:00
parent bb99793a2b
commit 768131d293
1 changed files with 2 additions and 2 deletions
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4
sys/vm/vm_fault.c
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@ -410,6 +410,7 @@ RetryFault:;
VM_WAITPFAULT;
goto RetryFault;
}
vm_page_unlock_queues();
/*
* Mark page busy for other processes, and the
@ -418,7 +419,6 @@ RetryFault:;
* found the page ).
*/
vm_page_busy(fs.m);
vm_page_unlock_queues();
if (((fs.m->valid & VM_PAGE_BITS_ALL) != VM_PAGE_BITS_ALL) &&
fs.m->object != kernel_object && fs.m->object != kmem_object) {
goto readrest;
@ -748,8 +748,8 @@ RetryFault:;
* automatically made dirty.
*/
vm_page_rename(fs.m, fs.first_object, fs.first_pindex);
vm_page_busy(fs.m);
vm_page_unlock_queues();
vm_page_busy(fs.m);
fs.first_m = fs.m;
fs.m = NULL;
PCPU_LAZY_INC(cnt.v_cow_optim);