[Bug 15906] serious performance regression in "umount" on ext4 over LVM

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

 



https://bugzilla.kernel.org/show_bug.cgi?id=15906


Eric Sandeen <sandeen@xxxxxxxxxx> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |sandeen@xxxxxxxxxx




--- Comment #4 from Eric Sandeen <sandeen@xxxxxxxxxx>  2010-05-04 21:05:24 ---
As I mentioned on the RH bz, it seems barrier-related.

I thought most barrier enhancements/changes were before 2.6.31, though.  Was
this really fast for you on .31?  Lots of lvm barrier changes went into .30.

mounting either the host fs, the loopback file, or both with "nobarrier" avoids
all the cache flushes from the barriers, and it's speedy again.

-Eric

-- 
Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are watching the assignee of the bug.
--
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