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[PATCH] splice: fix page stealing LRU handling.

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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>
This commit is contained in:
Jens Axboe 2006-04-02 23:11:04 +02:00
parent ad8d6f0a78
commit 3e7ee3e7b3
3 changed files with 18 additions and 19 deletions
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4
include/linux/pipe_fs_i.h
View file

@ -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 {