> So why is the kernel having difficulty allocating memory for its
> internal operations? We are suspecting memory fragmentation issues
> (at the application level which might have adverse sideefects for the
> kernel). Is it something that we can do so that the kernel will be
> able to allocate the needed memory for carrying out the system call?
Try this patch.
Mikulas
--- linux/mm/page_alloc.c__ Thu Mar 9 15:12:31 2000
+++ linux/mm/page_alloc.c Tue Mar 21 09:50:12 2000
@@ -237,6 +237,15 @@
RMQUEUE_TYPE(order, 1);
spin_unlock_irqrestore(&page_alloc_lock, flags);
+ if (!(current->flags & PF_MEMALLOC) && (gfp_mask & __GFP_WAIT)) {
+ int freed;
+ current->trashing_mem = 1;
+ current->flags |= PF_MEMALLOC;
+ freed = try_to_free_pages(gfp_mask);
+ current->flags &= ~PF_MEMALLOC;
+ if (freed) goto ok_to_allocate;
+ }
+
nopage:
return 0;
}
-
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