Re: [RFC] writeback and cgroup

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

 



Hey, Vivek.

On Wed, Apr 04, 2012 at 11:49:09AM -0700, Tejun Heo wrote:
> > I am not sure what are you trying to say here. But primarily blk-throttle
> > will throttle read and direct IO. Buffered writes will go to root cgroup
> > which is typically unthrottled.
> 
> Ooh, my bad then.  Anyways, then the same applies to blk-throttle.
> Our current implementation essentially collapses at the face of
> write-heavy workload.

I went through the code and couldn't find where blk-throttle is
discriminating async IOs.  Were you saying that blk-throttle currently
doesn't throttle because those IOs aren't associated with the dirtying
task?  If so, note that it's different from cfq which explicitly
assigns all async IOs when choosing cfqq even if we fix tagging.

Thanks.

-- 
tejun
--
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


[Index of Archives]     [Linux Ext4 Filesystem]     [Union Filesystem]     [Filesystem Testing]     [Ceph Users]     [Ecryptfs]     [AutoFS]     [Kernel Newbies]     [Share Photos]     [Security]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux Cachefs]     [Reiser Filesystem]     [Linux RAID]     [Samba]     [Device Mapper]     [CEPH Development]
  Powered by Linux