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authorJens Axboe <axboe@suse.de>2006-04-03 01:11:04 +0400
committerJens Axboe <axboe@suse.de>2006-04-03 01:11:04 +0400
commit3e7ee3e7b36fa4e2d88d8fb0a2577be95fc4636d (patch)
tree46e972e78122f8a719dafc87572bffb25716e745 /include/linux/pipe_fs_i.h
parentad8d6f0a783ffa2ff9b0cf09910b889715772201 (diff)
downloadlinux-3e7ee3e7b36fa4e2d88d8fb0a2577be95fc4636d.tar.xz
[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/pipe_fs_i.h')
-rw-r--r--include/linux/pipe_fs_i.h4
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 {