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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 /fs/pipe.c | |
| 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 'fs/pipe.c')
| -rw-r--r-- | fs/pipe.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/pipe.c b/fs/pipe.c index 5093408746b8..795df987cd38 100644 --- a/fs/pipe.c +++ b/fs/pipe.c @@ -95,6 +95,8 @@ static void anon_pipe_buf_release(struct pipe_inode_info *info, struct pipe_buff { struct page *page = buf->page; + buf->flags &= ~PIPE_BUF_FLAG_STOLEN; + /* * If nobody else uses this page, and we don't already have a * temporary page, let's keep track of it as a one-deep @@ -124,6 +126,7 @@ static void anon_pipe_buf_unmap(struct pipe_inode_info *info, struct pipe_buffer static int anon_pipe_buf_steal(struct pipe_inode_info *info, struct pipe_buffer *buf) { + buf->flags |= PIPE_BUF_FLAG_STOLEN; return 0; } |