Re: OOM behavior in constrained memory situations

[Christoph Lameter]

On Mon, 6 Feb 2006, Andi Kleen wrote:

> At least remnants from my old 80% hack to avoid this (huge_page_needed)
> seem to be still there in mainline:
> 
> fs/hugetlbfs/inode.c:hugetlbfs_file_mmap
> 
>    bytes = huge_pages_needed(mapping, vma);
>    if (!is_hugepage_mem_enough(bytes))
>           return -ENOMEM;
> 
> 
> So something must be broken if this doesn't work. Or did you allocate
> the pages in some other way? 

huge pages are now allocated in the huge fault handler. If it would be 
returning an OOM then the OOM killer may be activated.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/