diff options
Diffstat (limited to 'sys/vm/vnode_pager.c')
| -rw-r--r-- | sys/vm/vnode_pager.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/sys/vm/vnode_pager.c b/sys/vm/vnode_pager.c index cf98090..667bd3a 100644 --- a/sys/vm/vnode_pager.c +++ b/sys/vm/vnode_pager.c @@ -1044,11 +1044,17 @@ vnode_pager_generic_putpages(vp, m, bytecount, flags, rtvals) /* * pageouts are already clustered, use IO_ASYNC t o force a bawrite() * rather then a bdwrite() to prevent paging I/O from saturating - * the buffer cache. + * the buffer cache. Dummy-up the sequential heuristic to cause + * large ranges to cluster. If neither IO_SYNC or IO_ASYNC is set, + * the system decides how to cluster. */ ioflags = IO_VMIO; - ioflags |= (flags & (VM_PAGER_PUT_SYNC | VM_PAGER_PUT_INVAL)) ? IO_SYNC: IO_ASYNC; + if (flags & (VM_PAGER_PUT_SYNC | VM_PAGER_PUT_INVAL)) + ioflags |= IO_SYNC; + else if ((flags & VM_PAGER_CLUSTER_OK) == 0) + ioflags |= IO_ASYNC; ioflags |= (flags & VM_PAGER_PUT_INVAL) ? IO_INVAL: 0; + ioflags |= IO_SEQMAX << IO_SEQSHIFT; aiov.iov_base = (caddr_t) 0; aiov.iov_len = maxsize; |
