Under Solaris KM_SLEEP ensures success (or at least you hang forever).

That said when working with a finite resource like memory failure really
is always a possibility.  It would be far better longer term if the ZFS
code could be weened off this assumption and properly handle the cases
where an allocation fails.  Still I've applied the patch to spl-0.3.4
since this layer is supposed to emulate Solaris as closely as possible.



git-svn-id: https://outreach.scidac.gov/svn/spl/trunk@164 7e1ea52c-4ff2-0310-8f11-9dd32ca42a1c

include/sys/kmem.h

@@ -49,7 +49,7 @@ extern "C" {
 /*
  * Memory allocation interfaces
  */
-#define KM_SLEEP                        GFP_KERNEL
+#define KM_SLEEP                        (GFP_KERNEL | __GFP_NOFAIL)
 #define KM_NOSLEEP                      GFP_ATOMIC
 #undef  KM_PANIC                        /* No linux analog */
 #define KM_PUSHPAGE                     (KM_SLEEP | __GFP_HIGH)