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Commit ff17be08 authored by Miklos Szeredi's avatar Miklos Szeredi
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fuse: writepage: skip already in flight 



If ->writepage() tries to write back a page whose copy is still in flight,
then just skip by calling redirty_page_for_writepage().

This is OK, since now ->writepage() should never be called for data
integrity sync.

Signed-off-by: default avatarMiklos Szeredi <mszeredi@suse.cz>
parent 8b284dc4

fs/fuse/file.c

+12 −0
Original line number Diff line number Diff line
@@ -1591,6 +1591,18 @@ static int fuse_writepage(struct page *page, struct writeback_control *wbc) 
{

	int err;



	if (fuse_page_is_writeback(page->mapping->host, page->index)) {

		/*

		 * ->writepages() should be called for sync() and friends.  We

		 * should only get here on direct reclaim and then we are

		 * allowed to skip a page which is already in flight

		 */

		WARN_ON(wbc->sync_mode == WB_SYNC_ALL);



		redirty_page_for_writepage(wbc, page);

		return 0;

	}



	err = fuse_writepage_locked(page);

	unlock_page(page);