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Re: [2.6 patch] let SUSPEND select HOTPLUG_CPU

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From: Pavel Machek <pavel@...>
To: Adrian Bunk <bunk@...>
Cc: Stefan Richter <stefanr@...>, Linus Torvalds <torvalds@...>, Rafael J. Wysocki <rjw@...>, Len Brown <lenb@...>, <david@...>, Andrew Morton <akpm@...>, <linux-acpi@...>, <linux-kernel@...>
Subject: Re: [2.6 patch] let SUSPEND select HOTPLUG_CPU
Date: Monday, July 30, 2007 - 5:18 pm

Hi!


It is complex :-(.

HOTPLUG_CPU is pretty solid for the case how _suspend_ uses it (ie
drivers quiescent).

It is also known broken for _other_ uses. (There was flamewar about
that recently).

I'm not sure how to express that in Kconfig language without
uglyness... We probably could split HOTPLUG_CPU into
HOTPLUG_CPU_SUSPEND_ONLY (not experimental) and HOTPLUG_CPU (enables
/sysfs interface)... but I do not think that is good idea. (It would
also make suspend debugging a bit harder).

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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Messages in current thread:
[GIT PATCH] ACPI patches for 2.6.23-rc1, Len Brown, (Wed Jul 25, 12:38 pm)
Re: [GIT PATCH] ACPI patches for 2.6.23-rc1, Linus Torvalds, (Wed Jul 25, 2:48 pm)
Re: [GIT PATCH] ACPI patches for 2.6.23-rc1, Len Brown, (Wed Jul 25, 6:51 pm)
Re: [GIT PATCH] ACPI patches for 2.6.23-rc1, , (Wed Jul 25, 10:20 pm)
Re: [GIT PATCH] ACPI patches for 2.6.23-rc1, Len Brown, (Thu Jul 26, 12:26 am)
Re: [GIT PATCH] ACPI patches for 2.6.23-rc1, , (Thu Jul 26, 1:00 am)
Re: [GIT PATCH] ACPI patches for 2.6.23-rc1, Linus Torvalds, (Thu Jul 26, 2:55 am)
Re: [GIT PATCH] ACPI patches for 2.6.23-rc1, Len Brown, (Thu Jul 26, 1:45 pm)
Re: [GIT PATCH] ACPI patches for 2.6.23-rc1, , (Thu Jul 26, 2:02 pm)
Re: [GIT PATCH] ACPI patches for 2.6.23-rc1, Linus Torvalds, (Thu Jul 26, 2:16 pm)
Re: [GIT PATCH] ACPI patches for 2.6.23-rc1, Jeff Garzik, (Thu Jul 26, 2:27 pm)
Re: [GIT PATCH] ACPI patches for 2.6.23-rc1, Len Brown, (Thu Jul 26, 2:18 pm)
Re: [GIT PATCH] ACPI patches for 2.6.23-rc1, Linus Torvalds, (Thu Jul 26, 2:01 pm)
CONFIG_SUSPEND? (was: Re: [GIT PATCH] ACPI patches for 2.6.2..., Rafael J. Wysocki, (Thu Jul 26, 3:17 pm)
Re: CONFIG_SUSPEND? (was: Re: [GIT PATCH] ACPI patches for 2..., Linus Torvalds, (Thu Jul 26, 3:57 pm)
Re: CONFIG_SUSPEND? (was: Re: [GIT PATCH] ACPI patches for 2..., Rafael J. Wysocki, (Thu Jul 26, 4:48 pm)
Re: CONFIG_SUSPEND? (was: Re: [GIT PATCH] ACPI patches for 2..., Linus Torvalds, (Thu Jul 26, 4:55 pm)
Re: CONFIG_SUSPEND? (was: Re: [GIT PATCH] ACPI patches for 2..., Len Brown, (Sat Jul 28, 3:30 am)
Re: CONFIG_SUSPEND? (was: Re: [GIT PATCH] ACPI patches for 2..., Linus Torvalds, (Sat Jul 28, 12:25 pm)
Re: CONFIG_SUSPEND? (was: Re: [GIT PATCH] ACPI patches for 2..., Linus Torvalds, (Sat Jul 28, 12:55 pm)
Re: CONFIG_SUSPEND? (was: Re: [GIT PATCH] ACPI patches for 2..., Len Brown, (Mon Jul 30, 11:53 pm)
Re: CONFIG_SUSPEND? (was: Re: [GIT PATCH] ACPI patches for 2..., , (Tue Jul 31, 12:09 am)
Re: CONFIG_SUSPEND? (was: Re: [GIT PATCH] ACPI patches for 2..., Pavel Machek, (Tue Jul 31, 2:33 am)
Re: CONFIG_SUSPEND? (was: Re: [GIT PATCH] ACPI patches for 2..., Rafael J. Wysocki, (Sat Jul 28, 2:29 pm)
Re: CONFIG_SUSPEND? (was: Re: [GIT PATCH] ACPI patches for 2..., Linus Torvalds, (Sat Jul 28, 2:31 pm)
[PATCH 0/2] Introduce CONFIG_HIBERNATION and CONFIG_SUSPEND ..., Rafael J. Wysocki, (Sun Jul 29, 6:20 am)
[PATCH 0/2] Introduce CONFIG_HIBERNATION and CONFIG_SUSPEND ..., Rafael J. Wysocki, (Sun Jul 29, 5:23 pm)
Re: [PATCH 0/2] Introduce CONFIG_HIBERNATION and CONFIG_SUSP..., Linus Torvalds, (Sun Jul 29, 8:21 pm)
[PATCH] ACPI: delete CONFIG_ACPI_PROCFS_SLEEP (again), Len Brown, (Tue Jul 31, 11:27 pm)
Re: [PATCH] ACPI: delete CONFIG_ACPI_PROCFS_SLEEP (again), Rafael J. Wysocki, (Wed Aug 1, 6:24 am)
[PATCH] create CONFIG_SUSPEND_UP_POSSIBLE, Len Brown, (Mon Jul 30, 11:54 pm)
Re: [PATCH] create CONFIG_SUSPEND_UP_POSSIBLE, Pavel Machek, (Tue Jul 31, 2:38 am)
Re: [PATCH] create CONFIG_SUSPEND_UP_POSSIBLE, Len Brown, (Fri Aug 3, 3:23 pm)
Re: [PATCH] create CONFIG_SUSPEND_UP_POSSIBLE, Pavel Machek, (Sun Aug 5, 2:36 pm)
Re: [PATCH] create CONFIG_SUSPEND_UP_POSSIBLE, Rafael J. Wysocki, (Tue Jul 31, 5:33 am)
Re: [PATCH 0/2] Introduce CONFIG_HIBERNATION and CONFIG_SUSP..., Len Brown, (Mon Jul 30, 11:54 pm)
Re: [PATCH 0/2] Introduce CONFIG_HIBERNATION and CONFIG_SUSP..., Rafael J. Wysocki, (Mon Jul 30, 3:25 am)
[PATCH 2/2] Introduce CONFIG_SUSPEND (updated), Rafael J. Wysocki, (Sun Jul 29, 5:27 pm)
Re: [PATCH 2/2] Introduce CONFIG_SUSPEND (updated), Len Brown, (Tue Jul 31, 12:59 am)
Re: [PATCH 2/2] Introduce CONFIG_SUSPEND (updated), Rafael J. Wysocki, (Tue Jul 31, 5:15 am)
Re: [linux-pm] Re: [PATCH 2/2] Introduce CONFIG_SUSPEND (upd..., Oliver Neukum, (Tue Jul 31, 5:16 am)
Re: [linux-pm] Re: [PATCH 2/2] Introduce CONFIG_SUSPEND (upd..., Rafael J. Wysocki, (Tue Jul 31, 6:01 am)
[PATCH 1/2] Replace CONFIG_SOFTWARE_SUSPEND with CONFIG_HIBE..., Rafael J. Wysocki, (Sun Jul 29, 5:24 pm)
[PATCH 2/2] Introduce CONFIG_SUSPEND, Rafael J. Wysocki, (Sun Jul 29, 8:38 am)
Re: [PATCH 2/2] Introduce CONFIG_SUSPEND, Adrian Bunk, (Sun Jul 29, 4:40 pm)
Re: [PATCH 2/2] Introduce CONFIG_SUSPEND, Rafael J. Wysocki, (Sun Jul 29, 5:17 pm)
Re: [PATCH 2/2] Introduce CONFIG_SUSPEND, Adrian Bunk, (Sun Jul 29, 5:18 pm)
Re: [PATCH 2/2] Introduce CONFIG_SUSPEND, Rafael J. Wysocki, (Sun Jul 29, 5:36 pm)
Re: [PATCH 2/2] Introduce CONFIG_SUSPEND, Richard Hughes, (Sun Jul 29, 5:30 pm)
Re: [PATCH 2/2] Introduce CONFIG_SUSPEND, Kyle Moffett, (Sun Jul 29, 10:47 pm)
Re: [PATCH 2/2] Introduce CONFIG_SUSPEND, Rafael J. Wysocki, (Sun Jul 29, 6:22 pm)
Re: [PATCH 2/2] Introduce CONFIG_SUSPEND, Pavel Machek, (Mon Jul 30, 5:26 pm)
[PATCH 1/2] Replace CONFIG_SOFTWARE_SUSPEND with CONFIG_HIBE..., Rafael J. Wysocki, (Sun Jul 29, 6:21 am)
[PATCH] ACPI: restore CONFIG_ACPI_SLEEP, Len Brown, (Sat Jul 28, 3:33 am)
[2.6 patch] let SUSPEND select HOTPLUG_CPU, Adrian Bunk, (Fri Jul 27, 6:25 pm)
Re: [2.6 patch] let SUSPEND select HOTPLUG_CPU, Linus Torvalds, (Fri Jul 27, 6:57 pm)
[2.6 patch] SOFTWARE_SUSPEND: handle HOTPLUG_CPU automatically, Adrian Bunk, (Sat Jul 28, 12:52 am)
Re: [2.6 patch] SOFTWARE_SUSPEND: handle HOTPLUG_CPU automat..., Stefan Richter, (Sat Jul 28, 5:07 am)
Re: [2.6 patch] let SUSPEND select HOTPLUG_CPU, Stefan Richter, (Fri Jul 27, 6:47 pm)
Re: [2.6 patch] let SUSPEND select HOTPLUG_CPU, Adrian Bunk, (Fri Jul 27, 7:03 pm)
Re: [2.6 patch] let SUSPEND select HOTPLUG_CPU, Pavel Machek, (Mon Jul 30, 5:18 pm)
Re: [2.6 patch] let SUSPEND select HOTPLUG_CPU, Stefan Richter, (Sat Jul 28, 4:42 am)
Re: [2.6 patch] let SUSPEND select HOTPLUG_CPU, Sergio Monteiro Basto, (Sat Jul 28, 10:44 am)
Re: [2.6 patch] let SUSPEND select HOTPLUG_CPU, Rafael J. Wysocki, (Sat Jul 28, 2:30 pm)
Re: [GIT PATCH] ACPI patches for 2.6.23-rc1, Gabriel C, (Thu Jul 26, 6:07 am)
Re: [GIT PATCH] ACPI patches for 2.6.23-rc1, Len Brown, (Thu Jul 26, 2:05 pm)
Re: [GIT PATCH] ACPI patches for 2.6.23-rc1, Linus Torvalds, (Thu Jul 26, 2:18 pm)
Re: defconfig , ACPI=n compile error, Gabriel C, (Thu Jul 26, 2:53 pm)
Re: [GIT PATCH] ACPI patches for 2.6.23-rc1, Gabriel C, (Thu Jul 26, 2:38 pm)
Re: [GIT PATCH] ACPI patches for 2.6.23-rc1, Linus Torvalds, (Thu Jul 26, 3:02 am)
Re: [GIT PATCH] ACPI patches for 2.6.23-rc1, Jan Dittmer, (Fri Jul 27, 2:26 am)
Re: [GIT PATCH] ACPI patches for 2.6.23-rc1, Andreas Schwab, (Fri Jul 27, 7:50 pm)
Re: [GIT PATCH] ACPI patches for 2.6.23-rc1, Jan Dittmer, (Sat Jul 28, 3:58 am)
Re: [GIT PATCH] ACPI patches for 2.6.23-rc1, Yasha Okshtein, (Tue Jul 31, 9:34 pm)
Re: [GIT PATCH] ACPI patches for 2.6.23-rc1, Thomas Renninger, (Fri Jul 27, 12:25 pm)