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Davidlohr Bueso authored
Both register and unregister call build_map_info() in order to create the list of mappings before installing or removing breakpoints for every mm which maps file backed memory. As such, there is no reason to hold the i_mmap_rwsem exclusively, so share it and allow concurrent readers to build the mapping data. Signed-off-by:
Davidlohr Bueso <dbueso@suse.de> Acked-by:
Srikar Dronamraju <srikar@linux.vnet.ibm.com> Acked-by:
"Kirill A. Shutemov" <kirill@shutemov.name> Cc: Oleg Nesterov <oleg@redhat.com> Acked-by:
Hugh Dickins <hughd@google.com> Acked-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Rik van Riel <riel@redhat.com> Acked-by:
Mel Gorman <mgorman@suse.de> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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