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authorNick Piggin <npiggin@suse.de>2007-03-27 08:55:08 +0200
committerJens Axboe <jens.axboe@oracle.com>2007-03-27 08:55:08 +0200
commit485ddb4b9741bafb70b22e5c1f9b4f37dc3e85bd (patch)
tree9d666e849cdf9c495d446df242d87e798d4baec9 /fs/eventpoll.c
parent1ffb96c587fa2af0d690dc3548a4a781c477bfb7 (diff)
1/2 splice: dont steal
Stealing pages with splice is problematic because we cannot just insert an uptodate page into the pagecache and hope the filesystem can take care of it later. We also cannot just ClearPageUptodate, then hope prepare_write does not write anything into the page, because I don't think prepare_write gives that guarantee. Remove support for SPLICE_F_MOVE for now. If we really want to bring it back, we might be able to do so with a the new filesystem buffered write aops APIs I'm working on. If we really don't want to bring it back, then we should decide that sooner rather than later, and remove the flag and all the stealing infrastructure before anybody starts using it. Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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