On Mon, 2016-05-23 at 20:42 +0200, Michal Hocko wrote: > On Mon 23-05-16 20:14:11, Ebru Akagunduz wrote: > > > > Currently khugepaged makes swapin readahead under > > down_write. This patch supplies to make swapin > > readahead under down_read instead of down_write. > You are still keeping down_write. Can we do without it altogether? > Blocking mmap_sem of a remote proces for write is certainly not nice.
Maybe Andrea can explain why khugepaged requires a down_write of mmap_sem? If it were possible to have just down_read that would make the code a lot simpler. -- All Rights Reversed.
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