lkml.org 
[lkml]   [2007]   [Apr]   [25]   [last100]   RSS Feed
Views: [more markup]  [less markup]  [headers]  [forward] 
 
Messages in this thread
/
DateWed, 25 Apr 2007 15:58:34 -0700 (PDT)
FromLinus Torvalds <>
SubjectRe: suspend2 merge (was Re: [Suspend2-devel] Re: CFS and suspend2: hang in atomic copy)

On Thu, 26 Apr 2007, Pavel Machek wrote:
> 
> Suspend syncs caches/spins down. Freeze does not do anything.
> 
> That's okay, I keep claiming "freeze" is subset of "suspend". Can you
> name device where that is not true?

Sure. Like just about any PCI device that doesn't do things on its own.

A "freeze" does nothing at all, or perhaps shuts down the reader side 
(for something like a network controller).

A "suspend" does "write D3 to the suspend register". Absolutely zero in 
common.

> Remember we do
> 
> suspend(PMSG_FREEZE)
> atomic snapshot
> resume()
> write snapshot.

AND THAT IS STUPID. It mixes up "suspend()" and creating a snapshot in 
ways that are totally idiotic. There is nothing in common!

		Linus
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-04-26 01:01    [from the cache]
©2003-2008