On Monday 06 February 2006 22:10, Andrew Morton wrote:
> Do we really want to kill the application? A more convetional response
> would be to return NULL from the page allocator and let that trickle back.
Yes that is what it's supposed to be doing.
> The hugepage thing is special, because it's a pagefault, not a syscall.
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?
>From taking a quick look at ipc/shm.c it might be missing an equivalent
check when allocating a huge page segment.
-Andi
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