[PATCH v1 0/8] do not use s_dirt in ext2

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



This patch-set makes ext2 independent of the VFS superblock management
services. Namely, ext2 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).

Note, I tried to optimize 'sync_supers()' instead in 2010, but Al wanted me
to get rid of it instead. See https://lkml.org/lkml/2010/6/6/87
And I think this is right because many file-systems do not need this, for
example btrfs does not use VFS superblock management services at all, so on a
btrfs-based system we currently end-up useless periodic wake-ups source.

I have sent a similar patch-set for ext4 recently to Ted, see:
http://lkml.org/lkml/2012/3/20/220

Changes for other file-systems are coming later.

The patch-set structure.
1. patch 1 exports 'dirty_writeback_interval' and I also sent it as part of the
   ext4 patch-set
2. patch 2 is also and independent VFS clean-up and I also sent it as part of
   the ext4 patch-set
3. patch 3 is an independent ext2 clean-up patch
4. patches 4-8 actually make ext2 independent on the 'sync_supers()' thread.

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


[Index of Archives]     [Reiser Filesystem Development]     [Ceph FS]     [Kernel Newbies]     [Security]     [Netfilter]     [Bugtraq]     [Linux FS]     [Yosemite National Park]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Samba]     [Device Mapper]     [Linux Media]

  Powered by Linux