This patch-set makes ext4 independent of the VFS superblock management services. Namely, ext4 does not require to register the 'write_super()' VFS call-back. The reason of this exercises is to get rid of the 'sync_supers()' kernel thread which wakes up every 5 seconds (by default) even if all superblocks are clean. This is wasteful from power management POW (unnecessary wake-ups). Version 1 of this patch-set can be found here: https://lkml.org/lkml/2012/3/20/220 Changes between v1 and v2. * Rake different strategy - instead of pushing 's_dirt' down "as-is" and emulating old behavior, we now just submit the superblock for writing straight away, either via the journal or directly. Thank to Jan Kara for helping with this. * Ted picked some of the patches already, which made this series shorter - thanks! * This time I've tested the changes using xfstests. * Rebased to 3.4-rc1. Note: Ted, you merged the "mm: export dirty_writeback_interval", but it looks like we won't need this for ext[23]. However, for other file-systems we will need this change. Thanks, Artem. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
