From: David Miller <davem@davemloft.net>
To: sam@ravnborg.org
Cc: srivatsa.bhat@linux.vnet.ibm.com, tglx@linutronix.de,
linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
torvalds@linux-foundation.org, akpm@linux-foundation.org,
rusty@rustcorp.com.au, paulmck@linux.vnet.ibm.com, mingo@elte.hu,
peterz@infradead.org, magnus.damm@gmail.com
Subject: Re: [PATCH] sparc: Use generic idle loop
Date: Mon, 08 Apr 2013 15:24:49 -0400 (EDT) [thread overview]
Message-ID: <20130408.152449.169732563685022388.davem@davemloft.net> (raw)
In-Reply-To: <20130408171035.GA27264@merkur.ravnborg.org>
From: Sam Ravnborg <sam@ravnborg.org>
Date: Mon, 8 Apr 2013 19:10:35 +0200
> I think not.
> local_irq_disable writes 0 to the PIL register,
> whereas the above code set the IE (Interrupt enable) bit to 0.
>
> So the implementations differs - and I think there is a good
> reason for being so.
>
> But this is the part where I refer to that I am fooling around
> in code that I do not understand.
> I re-checked the SPARC V9 manual - but I did not within a few minutes
> reading understand what is the difference between the twoo.
Device interrupts arrive first as high-priority interrupt packets
that are serviced by traps which are enabled only if PSTATE.IE is
set.
These trap handlers reschedule the interrupt quickly into a PIL
levelled interrupt, whose delivery is covered by (%pil & PSTATE.IE)
The sun4v sleeping code requires that we have PSTATE.IE clear over
the cpu sleep hypervisor call.
next prev parent reply other threads:[~2013-04-08 19:24 UTC|newest]
Thread overview: 140+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-21 21:52 [patch 00/34] idle: Consolidate idle implementations Thomas Gleixner
2013-03-21 21:52 ` [patch 01/34] arch: Cleanup enable/disable_hlt Thomas Gleixner
2013-03-21 21:52 ` Thomas Gleixner
2013-03-21 21:52 ` [patch 02/34] arch: Consolidate tsk_is_polling() Thomas Gleixner
2013-03-21 21:52 ` Thomas Gleixner
2013-03-22 5:01 ` Tony Breeds
2013-03-22 5:20 ` Tony Breeds
2013-03-22 9:26 ` Thomas Gleixner
2013-03-21 21:52 ` [patch 03/34] idle: Implement set/clr functions for need_resched poll Thomas Gleixner
2013-03-21 21:52 ` Thomas Gleixner
2013-03-22 9:38 ` James Hogan
2013-03-21 21:52 ` [patch 04/34] idle: Provide a generic entry point for the idle code Thomas Gleixner
2013-03-21 21:52 ` Thomas Gleixner
2013-03-21 21:53 ` [patch 06/34] arc: Use generic idle loop Thomas Gleixner
2013-03-22 9:02 ` Vineet Gupta
2013-03-21 21:53 ` [patch 05/34] idle: Implement generic idle function Thomas Gleixner
2013-03-23 8:56 ` Heiko Carstens
2013-03-25 10:39 ` Thomas Gleixner
2013-03-28 15:39 ` Srivatsa S. Bhat
2013-11-18 6:05 ` Viresh Kumar
2013-11-22 22:32 ` Thomas Gleixner
2013-03-21 21:53 ` [patch 07/34] alpha: Use generic idle loop Thomas Gleixner
2013-03-21 21:53 ` Thomas Gleixner
2013-03-28 15:37 ` Srivatsa S. Bhat
2013-03-29 11:22 ` Thomas Gleixner
2013-03-21 21:53 ` [patch 08/34] arm: " Thomas Gleixner
2013-03-21 21:53 ` Thomas Gleixner
2013-03-22 21:24 ` Kevin Hilman
2013-03-22 21:24 ` Kevin Hilman
2013-03-25 11:31 ` Thomas Gleixner
2013-03-25 11:48 ` Russell King - ARM Linux
2013-03-25 11:48 ` Russell King - ARM Linux
2013-03-25 14:02 ` Thomas Gleixner
2013-04-08 21:47 ` Russell King - ARM Linux
2013-04-09 9:20 ` Thomas Gleixner
2013-04-09 9:20 ` Thomas Gleixner
2013-04-09 9:38 ` Russell King - ARM Linux
2013-04-09 9:38 ` Russell King - ARM Linux
2013-04-25 20:03 ` Stephen Boyd
2013-04-25 21:01 ` Thomas Gleixner
2013-04-25 21:01 ` Thomas Gleixner
2013-05-01 0:49 ` Stephen Boyd
2013-05-01 0:55 ` Paul E. McKenney
2013-05-21 0:57 ` [PATCH] ARM: smp: Drop RCU_NONIDLE usage in cpu_die() Stephen Boyd
2013-03-21 21:53 ` [patch 09/34] arm64: Use generic idle loop Thomas Gleixner
2013-03-21 21:53 ` Thomas Gleixner
2013-03-25 18:06 ` Catalin Marinas
2013-03-21 21:53 ` [patch 10/34] avr32: " Thomas Gleixner
2013-03-21 21:53 ` Thomas Gleixner
2013-03-21 21:53 ` [patch 12/34] c6x: " Thomas Gleixner
2013-03-21 21:53 ` Thomas Gleixner
2013-03-21 21:53 ` [patch 11/34] bfin: " Thomas Gleixner
2013-03-21 21:53 ` Thomas Gleixner
2013-03-21 21:53 ` [patch 13/34] cris: " Thomas Gleixner
2013-03-21 21:53 ` Thomas Gleixner
2013-03-27 15:04 ` Jesper Nilsson
2013-03-27 15:04 ` Jesper Nilsson
2013-03-27 17:10 ` Thomas Gleixner
2013-03-21 21:53 ` [patch 14/34] frv: " Thomas Gleixner
2013-03-21 21:53 ` Thomas Gleixner
2013-03-21 21:53 ` [patch 15/34] h8300: " Thomas Gleixner
2013-03-21 21:53 ` Thomas Gleixner
2013-03-21 21:53 ` [patch 16/34] hexagon: " Thomas Gleixner
2013-03-21 21:53 ` Thomas Gleixner
2013-03-21 21:53 ` [patch 17/34] ia64: " Thomas Gleixner
2013-03-21 21:53 ` Thomas Gleixner
2013-03-28 15:40 ` Srivatsa S. Bhat
2013-03-28 15:40 ` Srivatsa S. Bhat
2013-03-21 21:53 ` [patch 18/34] m32r: " Thomas Gleixner
2013-03-21 21:53 ` Thomas Gleixner
2013-03-21 21:53 ` [patch 19/34] m68k: " Thomas Gleixner
2013-03-21 21:53 ` Thomas Gleixner
2013-03-21 21:53 ` [patch 20/34] metag: " Thomas Gleixner
2013-03-21 21:53 ` Thomas Gleixner
2013-03-22 10:16 ` James Hogan
2013-03-25 11:26 ` Thomas Gleixner
2013-03-21 21:53 ` [patch 21/34] microblaze: " Thomas Gleixner
2013-03-21 21:53 ` [patch 22/34] mips: " Thomas Gleixner
2013-03-21 21:53 ` Thomas Gleixner
2013-03-28 15:42 ` Srivatsa S. Bhat
2013-03-28 15:42 ` Srivatsa S. Bhat
2013-03-21 21:53 ` [patch 24/34] openrisc: " Thomas Gleixner
2013-03-21 21:53 ` Thomas Gleixner
2013-03-21 21:53 ` [patch 23/34] mn10300: " Thomas Gleixner
2013-03-21 21:53 ` [patch 25/34] parisc: " Thomas Gleixner
2013-03-21 21:53 ` [patch 26/34] powerpc: " Thomas Gleixner
2013-03-21 21:53 ` Thomas Gleixner
2013-03-28 15:40 ` Srivatsa S. Bhat
2013-03-28 15:40 ` Srivatsa S. Bhat
2013-04-01 9:13 ` Deepthi Dharwar
2013-04-01 9:13 ` Deepthi Dharwar
2013-03-21 21:53 ` [patch 27/34] s390: " Thomas Gleixner
2013-03-21 21:53 ` Thomas Gleixner
2013-03-23 9:38 ` Heiko Carstens
2013-03-23 9:38 ` Heiko Carstens
2013-03-23 9:39 ` Heiko Carstens
2013-03-21 21:53 ` [patch 28/34] score: " Thomas Gleixner
2013-03-21 21:53 ` [patch 30/34] tile: Enter idle with preemption disabled Thomas Gleixner
2013-03-21 21:53 ` Thomas Gleixner
2013-03-22 20:34 ` Chris Metcalf
2013-03-22 20:40 ` Chris Metcalf
2013-03-28 15:43 ` Srivatsa S. Bhat
2013-03-28 15:43 ` Srivatsa S. Bhat
2013-03-21 21:53 ` [patch 29/34] sh: Use generic idle loop Thomas Gleixner
2013-03-21 21:53 ` Thomas Gleixner
2013-03-28 15:40 ` Srivatsa S. Bhat
2013-03-21 21:53 ` [patch 31/34] tile: " Thomas Gleixner
2013-03-21 21:53 ` Thomas Gleixner
2013-03-28 15:41 ` Srivatsa S. Bhat
2013-03-29 11:24 ` Thomas Gleixner
2013-03-21 21:53 ` [patch 32/34] unicore: " Thomas Gleixner
2013-03-21 21:53 ` Thomas Gleixner
2013-03-21 21:53 ` [patch 33/34] x86: " Thomas Gleixner
2013-03-21 21:53 ` Thomas Gleixner
2013-03-28 15:43 ` Srivatsa S. Bhat
2013-03-28 15:43 ` Srivatsa S. Bhat
2013-03-21 21:53 ` [patch 34/34] xtensa: " Thomas Gleixner
2013-03-21 21:53 ` Thomas Gleixner
2013-03-22 12:37 ` Max Filippov
2013-03-22 12:37 ` Max Filippov
2013-03-22 20:09 ` [patch 00/34] idle: Consolidate idle implementations Sam Ravnborg
[not found] ` <alpine.LFD.2.02.1303271940150.22263@ionos>
[not found] ` <5153EC43.7070808@zankel.net>
2013-03-28 9:24 ` Thomas Gleixner
2013-03-28 22:16 ` Chris Zankel
2013-03-29 16:19 ` Sam Ravnborg
2013-03-29 16:19 ` Sam Ravnborg
2013-03-29 20:29 ` [PATCH] sparc: Use generic idle loop Sam Ravnborg
2013-03-31 23:46 ` David Miller
2013-04-01 6:53 ` Srivatsa S. Bhat
2013-04-01 6:53 ` Srivatsa S. Bhat
2013-04-01 9:06 ` Sam Ravnborg
2013-04-01 9:06 ` Sam Ravnborg
2013-04-08 12:33 ` Srivatsa S. Bhat
2013-04-08 12:33 ` Srivatsa S. Bhat
2013-04-08 17:10 ` Sam Ravnborg
2013-04-08 19:24 ` David Miller [this message]
2013-04-11 19:38 ` [PATCH v2] " Sam Ravnborg
2013-04-11 19:38 ` Sam Ravnborg
2013-04-12 18:56 ` Thomas Gleixner
2013-04-12 18:58 ` David Miller
2013-05-03 9:47 ` [patch 00/34] idle: Consolidate idle implementations Geert Uytterhoeven
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