https://github.com/torvalds/linux
Revision dd8849c8f59ec1cee4809a0c5e603e045abe860e authored by Jesse Barnes on 09 September 2010, 18:58:02 UTC, committed by Chris Wilson on 10 September 2010, 14:11:43 UTC
We don't know how to enable it safely, especially as outputs turn on and off. When disabling LP1 we also need to make sure LP2 and 3 are already disabled. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=29173 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=29082 Reported-by: Chris Lord <chris@linux.intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org> Tested-by: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: stable@kernel.org Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
1 parent 7839d95
Tip revision: dd8849c8f59ec1cee4809a0c5e603e045abe860e authored by Jesse Barnes on 09 September 2010, 18:58:02 UTC
drm/i915: don't enable self-refresh on Ironlake
drm/i915: don't enable self-refresh on Ironlake
Tip revision: dd8849c
thrash.c
/*
* mm/thrash.c
*
* Copyright (C) 2004, Red Hat, Inc.
* Copyright (C) 2004, Rik van Riel <riel@redhat.com>
* Released under the GPL, see the file COPYING for details.
*
* Simple token based thrashing protection, using the algorithm
* described in: http://www.cs.wm.edu/~sjiang/token.pdf
*
* Sep 2006, Ashwin Chaugule <ashwin.chaugule@celunite.com>
* Improved algorithm to pass token:
* Each task has a priority which is incremented if it contended
* for the token in an interval less than its previous attempt.
* If the token is acquired, that task's priority is boosted to prevent
* the token from bouncing around too often and to let the task make
* some progress in its execution.
*/
#include <linux/jiffies.h>
#include <linux/mm.h>
#include <linux/sched.h>
#include <linux/swap.h>
static DEFINE_SPINLOCK(swap_token_lock);
struct mm_struct *swap_token_mm;
static unsigned int global_faults;
void grab_swap_token(struct mm_struct *mm)
{
int current_interval;
global_faults++;
current_interval = global_faults - mm->faultstamp;
if (!spin_trylock(&swap_token_lock))
return;
/* First come first served */
if (swap_token_mm == NULL) {
mm->token_priority = mm->token_priority + 2;
swap_token_mm = mm;
goto out;
}
if (mm != swap_token_mm) {
if (current_interval < mm->last_interval)
mm->token_priority++;
else {
if (likely(mm->token_priority > 0))
mm->token_priority--;
}
/* Check if we deserve the token */
if (mm->token_priority > swap_token_mm->token_priority) {
mm->token_priority += 2;
swap_token_mm = mm;
}
} else {
/* Token holder came in again! */
mm->token_priority += 2;
}
out:
mm->faultstamp = global_faults;
mm->last_interval = current_interval;
spin_unlock(&swap_token_lock);
}
/* Called on process exit. */
void __put_swap_token(struct mm_struct *mm)
{
spin_lock(&swap_token_lock);
if (likely(mm == swap_token_mm))
swap_token_mm = NULL;
spin_unlock(&swap_token_lock);
}
Computing file changes ...