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Lock a vm object when freeing a page from it.

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This commit is contained in:
Alan Cox 2003-07-05 20:51:22 +00:00
parent 2ba1b30bf5
commit f278f0fbab
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=117262
1 changed files with 7 additions and 0 deletions
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7
sys/vm/vm_contig.c
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@ -144,6 +144,7 @@ contigmalloc1(
{
int i, s, start;
vm_paddr_t phys;
vm_object_t object;
vm_offset_t addr, tmp_addr;
int pass, pqtype;
vm_page_t pga = vm_page_array;
@ -207,8 +208,14 @@ contigmalloc1(
vm_page_t m = &pga[i];
if ((m->queue - m->pc) == PQ_CACHE) {
object = m->object;
if (!VM_OBJECT_TRYLOCK(object)) {
start++;
goto again;
}
vm_page_busy(m);
vm_page_free(m);
VM_OBJECT_UNLOCK(object);
}
mtx_lock_spin(&vm_page_queue_free_mtx);
vm_pageq_remove_nowakeup(m);