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| author | alc <alc@FreeBSD.org> | 2011-06-29 16:40:41 +0000 |
|---|---|---|
| committer | alc <alc@FreeBSD.org> | 2011-06-29 16:40:41 +0000 |
| commit | 21902be08cad124037a2152459b485a54308e5ca (patch) | |
| tree | bffb0499b364b344b9d5ddbae978932a240d3045 /sys/kern/uipc_shm.c | |
| parent | 7b0555e88a9f208857e299f3e8380d8c8f67119b (diff) | |
| download | FreeBSD-src-21902be08cad124037a2152459b485a54308e5ca.zip FreeBSD-src-21902be08cad124037a2152459b485a54308e5ca.tar.gz | |
Add a new option, OBJPR_NOTMAPPED, to vm_object_page_remove(). Passing this
option to vm_object_page_remove() asserts that the specified range of pages
is not mapped, or more precisely that none of these pages have any managed
mappings. Thus, vm_object_page_remove() need not call pmap_remove_all() on
the pages.
This change not only saves time by eliminating pointless calls to
pmap_remove_all(), but it also eliminates an inconsistency in the use of
pmap_remove_all() versus related functions, like pmap_remove_write(). It
eliminates harmless but pointless calls to pmap_remove_all() that were being
performed on PG_UNMANAGED pages.
Update all of the existing assertions on pmap_remove_all() to reflect this
change.
Reviewed by: kib
Diffstat (limited to 'sys/kern/uipc_shm.c')
| -rw-r--r-- | sys/kern/uipc_shm.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/kern/uipc_shm.c b/sys/kern/uipc_shm.c index 00496af..cea70c7 100644 --- a/sys/kern/uipc_shm.c +++ b/sys/kern/uipc_shm.c @@ -264,7 +264,7 @@ shm_dotruncate(struct shmfd *shmfd, off_t length) /* Toss in memory pages. */ if (nobjsize < object->size) vm_object_page_remove(object, nobjsize, object->size, - FALSE); + 0); /* Toss pages from swap. */ if (object->type == OBJT_SWAP) |
