Messages in this thread | | | Date | Thu, 5 Jun 2003 17:12:15 +0100 (BST) | From | Hugh Dickins <> | Subject | Re: [PATCH] Remove page_table_lock from vma manipulations |
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On Wed, 4 Jun 2003, Dave McCracken wrote: > > Gah. I don't know how I convinced myself that code was safe. It's easily > fixed. How does this one look?
I think you have to keep page_table_lock in expand_stack (GROWSUP and down versions) because that is called with only down_read on mmap_sem, so two could be racing: nothing else protects the various vma field adjustments there. Otherwise appears correct to me. Beneficial?
Hugh
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