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| author | kib <kib@FreeBSD.org> | 2014-08-25 21:19:08 +0000 |
|---|---|---|
| committer | kib <kib@FreeBSD.org> | 2014-08-25 21:19:08 +0000 |
| commit | 35c4352f4cf19313edd692b31a703fbb51b80021 (patch) | |
| tree | 71ac198db296e7c587d85d06db6ac6c1b2a282bb /sys/vm | |
| parent | 982492098020b7969f4cbe23875a1ee6be782ebd (diff) | |
| download | FreeBSD-src-35c4352f4cf19313edd692b31a703fbb51b80021.zip FreeBSD-src-35c4352f4cf19313edd692b31a703fbb51b80021.tar.gz | |
MFC r261647 (by alc):
Don't call vm_fault_prefault() on zero-fill faults.
Diffstat (limited to 'sys/vm')
| -rw-r--r-- | sys/vm/vm_fault.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/sys/vm/vm_fault.c b/sys/vm/vm_fault.c index b5dc373..19c0eee 100644 --- a/sys/vm/vm_fault.c +++ b/sys/vm/vm_fault.c @@ -656,6 +656,8 @@ vnode_locked: } PCPU_INC(cnt.v_zfod); fs.m->valid = VM_PAGE_BITS_ALL; + /* Don't try to prefault neighboring pages. */ + faultcount = 1; break; /* break to PAGE HAS BEEN FOUND */ } else { KASSERT(fs.object != next_object, @@ -903,7 +905,8 @@ vnode_locked: */ pmap_enter(fs.map->pmap, vaddr, fs.m, prot, fault_type | (wired ? PMAP_ENTER_WIRED : 0), 0); - if ((fault_flags & VM_FAULT_CHANGE_WIRING) == 0 && wired == 0) + if (faultcount != 1 && (fault_flags & VM_FAULT_CHANGE_WIRING) == 0 && + wired == 0) vm_fault_prefault(&fs, vaddr, faultcount, reqpage); VM_OBJECT_WLOCK(fs.object); vm_page_lock(fs.m); |
