diff options
| author | Michael I. Bushnell <mib@gnu.org> | 1996-03-26 21:00:41 +0000 |
|---|---|---|
| committer | Michael I. Bushnell <mib@gnu.org> | 1996-03-26 21:00:41 +0000 |
| commit | 9d314501363cae362c9cdb07344eb7380ebd9849 (patch) | |
| tree | 2505411c17f870dcb3841fb19bec49a2c1b27575 | |
| parent | 94f1f96d40edc17ec9e7beeaab9533b33ec349df (diff) | |
(_pager_seqnos_memory_object_data_request): Add code to check to see
if there is an existing anticipation that corresponds, and use that in
preference to actual pagein. If this page is dirty, then mark the
page precious to make sure it gets paged out eventually.
| -rw-r--r-- | libpager/data-request.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/libpager/data-request.c b/libpager/data-request.c index b160ea9c..7f9e55f9 100644 --- a/libpager/data-request.c +++ b/libpager/data-request.c @@ -35,6 +35,7 @@ _pager_seqnos_memory_object_data_request (mach_port_t object, error_t err; vm_address_t page; int write_lock; + struct anticipation *ant; p = ports_lookup_port (0, object, _pager_class); if (!p) @@ -72,6 +73,16 @@ _pager_seqnos_memory_object_data_request (mach_port_t object, goto allow_term_out; } + ant = _pager_check_anticipations (p, length, offset); + if (ant) + { + memory_object_data_supply (p->memobjcntl, offset, ant->address, + length, 0, VM_PROT_NONE, 0, MACH_PORT_NULL); + + free (ant); + goto allow_term_out; + } + _pager_pagemap_resize (p, offset + length); /* If someone is paging this out right now, the disk contents are |