On Wed, Sep 07, 2011 at 06:42:16PM +0200, Jan Kara wrote: > Well, it depends on what you call common - usually, ->writepage is called > from kswapd which shouldn't be common compared to writeback from a flusher > thread. But now I've realized that JBD2 also calls ->writepage to fulfill > data=ordered mode guarantees and that's what causes most of redirtying of > pages on ext4. That's going away eventually but it will take some time. So > for now writeback has to handle redirtying... Under the "right" loads it may also happen for xfs because we can't take lock non-blockingly in the fluser thread for example. -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
