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Johannes Weiner 91b0abe36a mm + fs: store shadow entries in page cache 
Reclaim will be leaving shadow entries in the page cache radix tree upon
evicting the real page.  As those pages are found from the LRU, an
iput() can lead to the inode being freed concurrently.  At this point,
reclaim must no longer install shadow pages because the inode freeing
code needs to ensure the page tree is really empty.

Add an address_space flag, AS_EXITING, that the inode freeing code sets
under the tree lock before doing the final truncate.  Reclaim will check
for this flag before installing shadow pages.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Rik van Riel <riel@redhat.com>
Reviewed-by: Minchan Kim <minchan@kernel.org>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Bob Liu <bob.liu@oracle.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Jan Kara <jack@suse.cz>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Luigi Semenzato <semenzato@google.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Metin Doslu <metin@citusdata.com>
Cc: Michel Lespinasse <walken@google.com>
Cc: Ozgun Erdogan <ozgun@citusdata.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Roman Gushchin <klamm@yandex-team.ru>
Cc: Ryan Mallon <rmallon@gmail.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2014-04-03 16:21:01 -07:00
..
Kconfig fs/Kconfig: move coda out 2009-01-22 13:16:01 +03:00
Makefile fs: change to new flag variable 2011-03-17 14:02:57 +01:00
cache.c coda: Cache permisions in struct coda_inode_info in a kuid_t. 2013-02-13 06:00:54 -08:00
cnode.c coda: switch coda_cnode_make() to sane API as well, clean coda_lookup() 2012-01-10 11:13:16 -05:00
coda_cache.h take coda-private headers out of include/linux 2011-01-12 20:02:48 -05:00
coda_fs_i.h coda: Cache permisions in struct coda_inode_info in a kuid_t. 2013-02-13 06:00:54 -08:00
coda_int.h fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers 2011-07-20 20:47:59 -04:00
coda_linux.c coda: Restrict coda messages to the initial user namespace 2013-02-13 06:00:53 -08:00
coda_linux.h coda_revalidate_inode(): switch to passing inode... 2013-11-09 00:16:21 -05:00
dir.c coda_revalidate_inode(): switch to passing inode... 2013-11-09 00:16:21 -05:00
file.c file->f_op is never NULL... 2013-10-24 23:34:54 -04:00
inode.c mm + fs: store shadow entries in page cache 2014-04-03 16:21:01 -07:00
pioctl.c new helper: file_inode(file) 2013-02-22 23:31:31 -05:00
psdev.c coda: Restrict coda messages to the initial user namespace 2013-02-13 06:00:53 -08:00
symlink.c take coda-private headers out of include/linux 2011-01-12 20:02:48 -05:00
sysctl.c codafs: fix build break when CONFIG_PROC_SYSCTL=n 2011-03-25 17:45:16 -07:00
upcall.c coda: Restrict coda messages to the initial user namespace 2013-02-13 06:00:53 -08:00