The patch titled
mm: comment mmap_sem / lock_page lockorder
has been added to the -mm tree. Its filename is
mm-comment-mmap_sem--lock_page-lockorder.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: mm: comment mmap_sem / lock_page lockorder
From: Nick Piggin <npiggin@xxxxxxx>
Add a few more examples to the mmap_sem / lock_page ordering.
Signed-off-by: Nick Piggin <npiggin@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
mm/filemap.c | 2 +-
mm/rmap.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff -puN mm/filemap.c~mm-comment-mmap_sem--lock_page-lockorder mm/filemap.c
--- a/mm/filemap.c~mm-comment-mmap_sem--lock_page-lockorder
+++ a/mm/filemap.c
@@ -73,7 +73,7 @@ generic_file_direct_IO(int rw, struct ki
* ->mapping->tree_lock (arch-dependent flush_dcache_mmap_lock)
*
* ->mmap_sem
- * ->lock_page (access_process_vm)
+ * ->lock_page (page fault, sys_mmap, access_process_vm)
*
* ->mmap_sem
* ->i_mutex (msync)
diff -puN mm/rmap.c~mm-comment-mmap_sem--lock_page-lockorder mm/rmap.c
--- a/mm/rmap.c~mm-comment-mmap_sem--lock_page-lockorder
+++ a/mm/rmap.c
@@ -29,7 +29,7 @@
* taken together; in truncation, i_mutex is taken outermost.
*
* mm->mmap_sem
- * page->flags PG_locked (lock_page)
+ * page->flags PG_locked (lock_page, eg from pagefault)
* mapping->i_mmap_lock
* anon_vma->lock
* mm->page_table_lock or pte_lock
_
Patches currently in -mm which might be from npiggin@xxxxxxx are
mm-comment-mmap_sem--lock_page-lockorder.patch
mm-pagecache-write-deadlocks.patch
oom-dont-kill-unkillable-children-or-siblings.patch
oom-cleanup-messages.patch
oom-less-memdie.patch
mm-incorrect-vm_fault_oom-returns-from-drivers.patch
mm-add-arch_alloc_page.patch
radix-tree-rcu-lockless-readside.patch
-
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