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| author | avg <avg@FreeBSD.org> | 2010-10-09 09:03:17 +0000 |
|---|---|---|
| committer | avg <avg@FreeBSD.org> | 2010-10-09 09:03:17 +0000 |
| commit | 2e7319683712e8a9c3471dbff271bd72171f2c9d (patch) | |
| tree | 4a5290c6331f0a272a0a91ed2b3229fde9d87a62 /sys/kern | |
| parent | 3373ecde5ca05e50431b3c471dc2273cd4aa0684 (diff) | |
| download | FreeBSD-src-2e7319683712e8a9c3471dbff271bd72171f2c9d.zip FreeBSD-src-2e7319683712e8a9c3471dbff271bd72171f2c9d.tar.gz | |
add kmem_map_free sysctl: query largest contiguous free range in kmem_map
Suggested by: alc
Reviewed by: alc
MFC after: 1 week
Diffstat (limited to 'sys/kern')
| -rw-r--r-- | sys/kern/kern_malloc.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/sys/kern/kern_malloc.c b/sys/kern/kern_malloc.c index ee45e3a..9c7ff40 100644 --- a/sys/kern/kern_malloc.c +++ b/sys/kern/kern_malloc.c @@ -207,6 +207,11 @@ SYSCTL_PROC(_vm, OID_AUTO, kmem_map_size, CTLFLAG_RD | CTLTYPE_ULONG | CTLFLAG_MPSAFE, NULL, 0, sysctl_kmem_map_size, "LU", "Current kmem_map allocation size"); +static int sysctl_kmem_map_free(SYSCTL_HANDLER_ARGS); +SYSCTL_PROC(_vm, OID_AUTO, kmem_map_free, + CTLFLAG_RD | CTLTYPE_ULONG | CTLFLAG_MPSAFE, NULL, 0, + sysctl_kmem_map_free, "LU", "Largest contiguous free range in kmem_map"); + /* * The malloc_mtx protects the kmemstatistics linked list. */ @@ -254,6 +259,18 @@ sysctl_kmem_map_size(SYSCTL_HANDLER_ARGS) return (sysctl_handle_long(oidp, &size, 0, req)); } +static int +sysctl_kmem_map_free(SYSCTL_HANDLER_ARGS) +{ + u_long size; + + vm_map_lock_read(kmem_map); + size = kmem_map->root != NULL ? + kmem_map->root->max_free : kmem_map->size; + vm_map_unlock_read(kmem_map); + return (sysctl_handle_long(oidp, &size, 0, req)); +} + /* * malloc(9) uma zone separation -- sub-page buffer overruns in one * malloc type will affect only a subset of other malloc types. |
