linux-kernel - [patch 0/2] Fix interactivity buglet with autogroup and shares distribution re-write

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Date:	Wed, 15 Dec 2010 19:10:16 -0800
From:	Paul Turner <pjt@...gle.com>
To:	linux-kernel@...r.kernel.org
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...e.hu>, Mike Galbraith <efault@....de>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: [patch 0/2] Fix interactivity buglet with autogroup and shares distribution re-write

This should address the interactivity issues reported by Mike Galbraith:
https://lkml.org/lkml/2010/11/28/47

The root cause turns out to be a mis-ordering of weight updates and accounting
outstanding execution time.

This is fixed by making update_curr() 'atomic' once more with respect to
accounting, this allows us to then make sure any outstanding time is charged in
the re-weight path (prior to the actual update).

Thank-you to everyone for their patience while we tracked this down,

- Paul

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