Re: CVS commit: src/sys/arch/xen/xen

[Mindaugas Rasiukevicius <rmind%netbsd.org@localhost>]

Jean-Yves Migeon <jeanyves.migeon%free.fr@localhost> wrote:
> On 18.04.2011 10:35, Mindaugas Rasiukevicius wrote:
> > We used to check the return of big size allocations, when kmem(9) could
> > fail even with KM_SLEEP due to KVA starvation.  However, pretty much all
> > kernel does not perform checks for smaller allocations and since the bug
> > was fixed - we are no longer checking for big ones as well.
> > 
> > This applies to all allocators.
> 
> So, any thread sleeping for an allocation cannot be interrupted?
> 

Nope.  However, for nearly all cases there is no need for that.

For the previous reserve_pages() case, pointed out by Cherry, code should
rather be restructured to pre-allocate memory before acquiring the locks.
That would have avoided the problem.

-- 
Mindaugas