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From: Greg KH on 23 Mar 2010 22:40
On Mon, Mar 22, 2010 at 11:50:54PM +0000, Mel Gorman wrote:
> 2. TTY using high order allocations more frequently
> fix title: ttyfix
> fixed in mainline? yes, in 2.6.34-rc2
> affects: 2.6.31 to 2.6.34-rc1
>
> 2.6.31 made pty's use the same buffering logic as tty. Unfortunately,
> it was also allowed to make high-order GFP_ATOMIC allocations. This
> triggers some high-order reclaim and introduces some stalls. It's
> fixed in 2.6.34-rc2 but needs back-porting.

It will go to the other stable kernels for their next round of releases
now that it is in Linus's tree.

> Next Steps
> ==========
>
> Jens, any problems with me backporting the async/sync fixes from 2.6.31 to
> 2.6.30.x (assuming that is still maintained, Greg?)?

No, .30 is no longer being maintained.

thanks,

greg k-h
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From: Mel Gorman on 24 Mar 2010 08:00
On Tue, Mar 23, 2010 at 07:38:37PM -0700, Greg KH wrote:
> On Mon, Mar 22, 2010 at 11:50:54PM +0000, Mel Gorman wrote:
> > 2. TTY using high order allocations more frequently
> > fix title: ttyfix
> > fixed in mainline? yes, in 2.6.34-rc2
> > affects: 2.6.31 to 2.6.34-rc1
> >
> > 2.6.31 made pty's use the same buffering logic as tty. Unfortunately,
> > it was also allowed to make high-order GFP_ATOMIC allocations. This
> > triggers some high-order reclaim and introduces some stalls. It's
> > fixed in 2.6.34-rc2 but needs back-porting.
>
> It will go to the other stable kernels for their next round of releases
> now that it is in Linus's tree.
>

Great.

> > Next Steps
> > ==========
> >
> > Jens, any problems with me backporting the async/sync fixes from 2.6.31 to
> > 2.6.30.x (assuming that is still maintained, Greg?)?
>
> No, .30 is no longer being maintained.
>

Right, I won't lose any sleep over 2.6.30.dodo so :)

Thanks

--
Mel Gorman
Part-time Phd Student Linux Technology Center
University of Limerick IBM Dublin Software Lab
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