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| author | alc <alc@FreeBSD.org> | 2004-03-08 03:54:36 +0000 |
|---|---|---|
| committer | alc <alc@FreeBSD.org> | 2004-03-08 03:54:36 +0000 |
| commit | 81dacfa43ef94cd472f712f702b7674fa45b27ee (patch) | |
| tree | 5ee0b956aa87071d29a221727096deb4a4c0e0d5 /sys/vm/vm_object.c | |
| parent | fc9a6b748e010eddfcd67121ee570dbc2124c2e9 (diff) | |
| download | FreeBSD-src-81dacfa43ef94cd472f712f702b7674fa45b27ee.zip FreeBSD-src-81dacfa43ef94cd472f712f702b7674fa45b27ee.tar.gz | |
Implement a work around for the deadlock avoidance case in
vm_object_deallocate() so that it doesn't spin forever either.
Submitted by: bde
Diffstat (limited to 'sys/vm/vm_object.c')
| -rw-r--r-- | sys/vm/vm_object.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/sys/vm/vm_object.c b/sys/vm/vm_object.c index 116a075..965666e 100644 --- a/sys/vm/vm_object.c +++ b/sys/vm/vm_object.c @@ -495,6 +495,13 @@ vm_object_deallocate(vm_object_t object) */ object->ref_count++; VM_OBJECT_UNLOCK(object); + /* + * More likely than not the thread + * holding robject's lock has lower + * priority than the current thread. + * Let the lower priority thread run. + */ + tsleep(&proc0, PVM, "vmo_de", 1); continue; } if ((robject->handle == NULL) && |
