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| author | alc <alc@FreeBSD.org> | 2006-11-12 21:48:34 +0000 |
|---|---|---|
| committer | alc <alc@FreeBSD.org> | 2006-11-12 21:48:34 +0000 |
| commit | 6093953d36a905170046a19eb1141c99b22fa802 (patch) | |
| tree | c4a9c71fe86ec1dd8e45421082e59941e177807f /sys/amd64 | |
| parent | 68445c77f7e732fbe9d5f4b930a9f2fcd0052b3f (diff) | |
| download | FreeBSD-src-6093953d36a905170046a19eb1141c99b22fa802.zip FreeBSD-src-6093953d36a905170046a19eb1141c99b22fa802.tar.gz | |
Make pmap_enter() responsible for setting PG_WRITEABLE instead
of its caller. (As a beneficial side-effect, a high-contention
acquisition of the page queues lock in vm_fault() is eliminated.)
Diffstat (limited to 'sys/amd64')
| -rw-r--r-- | sys/amd64/amd64/pmap.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/sys/amd64/amd64/pmap.c b/sys/amd64/amd64/pmap.c index c1f8c8b..7a8b672 100644 --- a/sys/amd64/amd64/pmap.c +++ b/sys/amd64/amd64/pmap.c @@ -2357,8 +2357,10 @@ validate: * Now validate mapping with desired protection/wiring. */ newpte = (pt_entry_t)(pa | PG_V); - if ((prot & VM_PROT_WRITE) != 0) + if ((prot & VM_PROT_WRITE) != 0) { newpte |= PG_RW; + vm_page_flag_set(m, PG_WRITEABLE); + } if ((prot & VM_PROT_EXECUTE) == 0) newpte |= pg_nx; if (wired) |
