Re: regression: 100% io-wait with 2.6.24-rcX

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

 



----- Original Message ----
> From: Mike Snitzer <snitzer@xxxxxxxxx>
> To: Martin Knoblauch <spamtrap@xxxxxxxxxxxx>
> Cc: Fengguang Wu <wfg@xxxxxxxxxxxxxxxx>; Peter Zijlstra <peterz@xxxxxxxxxxxxx>; jplatte@xxxxxxxxx; Ingo Molnar <mingo@xxxxxxx>; linux-kernel@xxxxxxxxxxxxxxx; "linux-ext4@xxxxxxxxxxxxxxx" <linux-ext4@xxxxxxxxxxxxxxx>; Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
> Sent: Thursday, January 17, 2008 5:11:50 PM
> Subject: Re: regression: 100% io-wait with 2.6.24-rcX
> 
> 
> I've backported Peter's perbdi patchset to 2.6.22.x.  I can share it
> with anyone who might be interested.
> 
> As expected, it has yielded 2.6.24-rcX level scaling.  Given the test
> result matrix you previously posted, 2.6.22.x+perbdi might give you
> what you're looking for (sans improved writeback that 2.6.24 was
> thought to be providing).  That is, much improved scaling with better
> O_DIRECT and network throughput.  Just a thought...
> 
> Unfortunately, my priorities (and computing resources) have shifted
> and I won't be able to thoroughly test Fengguang's new writeback patch
> on 2.6.24-rc8... whereby missing out on providing
> justification/testing to others on _some_ improved writeback being
> included in 2.6.24 final.
> 
> Not to mention the window for writeback improvement is all but closed
> considering the 2.6.24-rc8 announcement's 2.6.24 final release
> timetable.
> 
Mike,

 thanks for the offer, but the improved throughput is my #1 priority nowadays.
And while the better scaling for different targets is nothing to frown upon, the
much better scaling when writing to the same target would have been the big
winner for me.

 Anyway, I located the "offending" commit. Lets see what the experts say.


Cheers
Martin



-
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