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| author | Jens Axboe <axboe@suse.de> | 2006-04-02 23:11:04 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@suse.de> | 2006-04-02 23:11:04 +0200 |
| commit | 3e7ee3e7b36fa4e2d88d8fb0a2577be95fc4636d (patch) | |
| tree | 46e972e78122f8a719dafc87572bffb25716e745 /include/linux | |
| parent | ad8d6f0a783ffa2ff9b0cf09910b889715772201 (diff) | |
| download | lwn-3e7ee3e7b36fa4e2d88d8fb0a2577be95fc4636d.tar.gz lwn-3e7ee3e7b36fa4e2d88d8fb0a2577be95fc4636d.zip | |
[PATCH] splice: fix page stealing LRU handling.
Originally from Nick Piggin, just adapted to the newer branch.
You can't check PageLRU without holding zone->lru_lock. The page
release code can get away with it only because the page refcount is 0 at
that point. Also, you can't reliably remove pages from the LRU unless
the refcount is 0. Ever.
Signed-off-by: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Jens Axboe <axboe@suse.de>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/pipe_fs_i.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/pipe_fs_i.h b/include/linux/pipe_fs_i.h index 70ae9332ec16..ec384958d509 100644 --- a/include/linux/pipe_fs_i.h +++ b/include/linux/pipe_fs_i.h @@ -5,10 +5,14 @@ #define PIPE_BUFFERS (16) +#define PIPE_BUF_FLAG_STOLEN 0x01 +#define PIPE_BUF_FLAG_LRU 0x02 + struct pipe_buffer { struct page *page; unsigned int offset, len; struct pipe_buf_operations *ops; + unsigned int flags; }; struct pipe_buf_operations { |