Hi,
Please merge this patch also into your dyntick patchset. Upon further
refleciton, we shouldn't be _this_ aggressive to enter C3-type sleep if
there was bus mastering activity this jiffy.
Signed-off-by: Dominik Brodowski <[email protected]>
Index: working-tree/drivers/acpi/processor_idle.c
===================================================================
--- working-tree.orig/drivers/acpi/processor_idle.c
+++ working-tree/drivers/acpi/processor_idle.c
@@ -260,7 +260,7 @@ static void acpi_processor_idle(void)
pr->power.bm_check_timestamp = jiffies;
/*
- * If bus mastering is active, automatically demote
+ * If bus mastering is or was active this jiffy, demote
* to avoid a faulty transition. Note that the processor
* won't enter a low-power state during this call (to this
* function) but should upon the next.
@@ -271,7 +271,8 @@ static void acpi_processor_idle(void)
* qualification. This may, however, introduce DMA
* issues (e.g. floppy DMA transfer overrun/underrun).
*/
- if (bm_status && cx->demotion.threshold.bm) {
+ if ((pr->power.bm_activity & 0x01) &&
+ cx->demotion.threshold.bm) {
local_irq_enable();
next_state = cx->demotion.state;
if (dyn_tick_enabled())
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
