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| author | kib <kib@FreeBSD.org> | 2009-04-10 10:16:03 +0000 |
|---|---|---|
| committer | kib <kib@FreeBSD.org> | 2009-04-10 10:16:03 +0000 |
| commit | 81638d98846e99a6bfcf7398057a650533aa1390 (patch) | |
| tree | d2a9dfe34e82f1ea1ab3cbe791593b31fbee1dd2 /sys/vm/vm_map.h | |
| parent | 5a12c5d70e83806a92145c478867d74073203a09 (diff) | |
| download | FreeBSD-src-81638d98846e99a6bfcf7398057a650533aa1390.zip FreeBSD-src-81638d98846e99a6bfcf7398057a650533aa1390.tar.gz | |
When vm_map_wire(9) is allowed to skip holes in the wired region, skip
the mappings without any of read and execution rights, in particular,
the PROT_NONE entries. This makes mlockall(2) work for the process
address space that has such mappings.
Since protection mode of the entry may change between setting
MAP_ENTRY_IN_TRANSITION and final pass over the region that records
the wire status of the entries, allocate new map entry flag
MAP_ENTRY_WIRE_SKIPPED to mark the skipped PROT_NONE entries.
Reported and tested by: Hans Ottevanger <fbsdhackers beasties demon nl>
Reviewed by: alc
MFC after: 3 weeks
Diffstat (limited to 'sys/vm/vm_map.h')
| -rw-r--r-- | sys/vm/vm_map.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/sys/vm/vm_map.h b/sys/vm/vm_map.h index 34b183b..70c3a0b 100644 --- a/sys/vm/vm_map.h +++ b/sys/vm/vm_map.h @@ -137,6 +137,8 @@ struct vm_map_entry { #define MAP_ENTRY_GROWS_DOWN 0x1000 /* Top-down stacks */ #define MAP_ENTRY_GROWS_UP 0x2000 /* Bottom-up stacks */ +#define MAP_ENTRY_WIRE_SKIPPED 0x4000 + #ifdef _KERNEL static __inline u_char vm_map_entry_behavior(vm_map_entry_t entry) |
