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Code Issues Releases Activity

Plug a leak in the newer contigmalloc() implementation. Specifically, if

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a multipage allocation was aborted midway, the pages that were already
allocated were not always returned to the free list.

Submitted by: tegge
This commit is contained in:
Alan Cox 2006-01-26 05:51:26 +00:00
parent aed1a1f179
commit cfc26cd69c
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=154849
1 changed files with 5 additions and 10 deletions
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15
sys/vm/vm_contig.c
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@ -473,19 +473,14 @@ vm_page_alloc_contig(vm_pindex_t npages, vm_paddr_t low, vm_paddr_t high,
}
}
if (pqtype == PQ_CACHE) {
if (m->hold_count != 0) {
start = i - npages + 1;
goto retry;
}
if (m->hold_count != 0)
goto cleanup_freed;
object = m->object;
if (!VM_OBJECT_TRYLOCK(object)) {
start = i - npages + 1;
goto retry;
}
if (!VM_OBJECT_TRYLOCK(object))
goto cleanup_freed;
if ((m->flags & PG_BUSY) || m->busy != 0) {
VM_OBJECT_UNLOCK(object);
start = i - npages + 1;
goto retry;
goto cleanup_freed;
}
vm_page_free(m);
VM_OBJECT_UNLOCK(object);