Re: [uml-devel] Re: SMP skas requirements

[Blaisorblade <blaisorblade@yahoo.it>]

On Thursday 30 March 2006 23:03, Blaisorblade wrote:
> On Wednesday 29 March 2006 22:38, Anthony Brock wrote:
> > Quoting Jeff Dike <jdike@addtoit.com>:
> > > On Wed, Mar 29, 2006 at 12:40:00AM +0200, Blaisorblade wrote:
> > >> Finally, I'd like to get devshm merged if there aren't problems with
> > >> the code.

(Jeff wrote):
> > That one needs to check if /dev/shm is present, and fall back to /tmp
> > if not.

I'd add that it needs to retry even if the PROT_EXEC test fails:

*) if TMP, TEMP or TMPDIR are set, use that and fail if the check fails, 
abort, because the user wanted to use that but forgot to change permissions.

*) if instead we pick /dev/shm but it has not PROT_EXEC, we should switch 
to /tmp and fail only then.

> > Are you proposing that virtual servers automatically using /dev/shm if
> > available and only falling back to the $TMP variable and /tmp directory
> > if not? Or would this keep the use of $TMP if present and fall back to
> > /dev/shm followed by /tmp?

> By looking at:
> http://user-mode-linux.sourceforge.net/work/current/2.6/2.6.16/patches/devs
>hm

Sorry, forgot to finish. That patch keeps checking TMP,TMPDIR and TEMP (don't 
remember the order), but if none is set, it switches the default from /tmp 
to /dev/shm.
-- 
Inform me of my mistakes, so I can keep imitating Homer Simpson's "Doh!".
Paolo Giarrusso, aka Blaisorblade (Skype ID "PaoloGiarrusso", ICQ 215621894)
http://www.user-mode-linux.org/~blaisorblade

	

	
		
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