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| author | Andrew Morton <akpm@osdl.org> | 2006-01-08 01:00:39 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-08 20:12:40 -0800 |
| commit | 9d0243bca345d5ce25d3f4b74b7facb3a6df1232 (patch) | |
| tree | a3a0a763bf83a483282dc1c3caab587941a98fc2 /fs/Makefile | |
| parent | bec6b0c89b234090681a4516e20ac5debe3e7c59 (diff) | |
| download | blackbird-op-linux-9d0243bca345d5ce25d3f4b74b7facb3a6df1232.tar.gz blackbird-op-linux-9d0243bca345d5ce25d3f4b74b7facb3a6df1232.zip | |
[PATCH] drop-pagecache
Add /proc/sys/vm/drop_caches. When written to, this will cause the kernel to
discard as much pagecache and/or reclaimable slab objects as it can. THis
operation requires root permissions.
It won't drop dirty data, so the user should run `sync' first.
Caveats:
a) Holds inode_lock for exorbitant amounts of time.
b) Needs to be taught about NUMA nodes: propagate these all the way through
so the discarding can be controlled on a per-node basis.
This is a debugging feature: useful for getting consistent results between
filesystem benchmarks. We could possibly put it under a config option, but
it's less than 300 bytes.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/Makefile')
| -rw-r--r-- | fs/Makefile | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/Makefile b/fs/Makefile index 73676111ebbe..35e9aec608e4 100644 --- a/fs/Makefile +++ b/fs/Makefile @@ -10,7 +10,7 @@ obj-y := open.o read_write.o file_table.o buffer.o bio.o super.o \ ioctl.o readdir.o select.o fifo.o locks.o dcache.o inode.o \ attr.o bad_inode.o file.o filesystems.o namespace.o aio.o \ seq_file.o xattr.o libfs.o fs-writeback.o mpage.o direct-io.o \ - ioprio.o pnode.o + ioprio.o pnode.o drop_caches.o obj-$(CONFIG_INOTIFY) += inotify.o obj-$(CONFIG_EPOLL) += eventpoll.o |
