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- Hold the kernel_object's lock around vm_page_alloc(kernel_object,...).

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- Hold the page queues lock around vm_page_wakeup().
This commit is contained in:
Alan Cox 2002-12-23 20:10:47 +00:00
parent ca6e3cb0e4
commit 0cb6c00463
1 changed files with 6 additions and 0 deletions
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6
sys/kern/vfs_bio.c
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@ -584,9 +584,11 @@ bufinit(void)
*/
bogus_offset = kmem_alloc_pageable(kernel_map, PAGE_SIZE);
vm_object_lock(kernel_object);
bogus_page = vm_page_alloc(kernel_object,
((bogus_offset - VM_MIN_KERNEL_ADDRESS) >> PAGE_SHIFT),
VM_ALLOC_NORMAL);
vm_object_unlock(kernel_object);
cnt.v_wire_count++;
}
@ -3471,9 +3473,11 @@ tryagain:
* could intefere with paging I/O, no matter which
* process we are.
*/
vm_object_lock(kernel_object);
p = vm_page_alloc(kernel_object,
((pg - VM_MIN_KERNEL_ADDRESS) >> PAGE_SHIFT),
VM_ALLOC_SYSTEM | VM_ALLOC_WIRED);
vm_object_unlock(kernel_object);
if (!p) {
vm_pageout_deficit += (to - from) >> PAGE_SHIFT;
VM_WAIT;
@ -3485,7 +3489,9 @@ tryagain:
vm_page_unlock_queues();
pmap_qenter(pg, &p, 1);
bp->b_pages[index] = p;
vm_page_lock_queues();
vm_page_wakeup(p);
vm_page_unlock_queues();
}
bp->b_npages = index;
}