Re: [PATCH] mm: Downgrade mmap_sem before locking or populating on mmap
From: Al Viro <viro@ZenIV.linux.org.uk>
Date: 2012-12-16 17:48:07
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On Sun, Dec 16, 2012 at 05:04:03PM +0000, Al Viro wrote:
Moreover, I'm not quite convinced that huge_memory.c and ksm.c can't run into all kinds of interesting races with ongoing coredump. Looking into it...
Specifically, is collapse_huge_page() safe in parallel with ->core_dump()? It *can* run while we are in the middle of e.g. elf_core_dump(). -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>