# HG changeset patch # User Andrea Arcangeli <[EMAIL PROTECTED]> # Date 1207159059 -7200 # Node ID f3f119118b0abd9c4624263ef388dc7230d937fe # Parent 31fc23193bd039cc595fba1ca149a9715f7d0fb2 This patch adds a lock ordering rule to avoid a potential deadlock when multiple mmap_sems need to be locked.
Signed-off-by: Dean Nelson <[EMAIL PROTECTED]> diff --git a/mm/filemap.c b/mm/filemap.c --- a/mm/filemap.c +++ b/mm/filemap.c @@ -79,6 +79,9 @@ * * ->i_mutex (generic_file_buffered_write) * ->mmap_sem (fault_in_pages_readable->do_page_fault) + * + * When taking multiple mmap_sems, one should lock the lowest-addressed + * one first proceeding on up to the highest-addressed one. * * ->i_mutex * ->i_alloc_sem (various) ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
