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7afd88d916
linux/fs/gfs2
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Steven Whitehouse 7afd88d916 [GFS2] Fix a page lock / glock deadlock 
We've previously been using a "try lock" in readpage on the basis that
it would prevent deadlocks due to the inverted lock ordering (our normal
lock ordering is glock first and then page lock). Unfortunately tests
have shown that this isn't enough. If the glock has a demote request
queued such that run_queue() in the glock code tries to do a demote when
its called under readpage then it will try and write out all the dirty
pages which requires locking them. This then deadlocks with the page
locked by readpage.

The solution is to always require two calls into readpage. The first
unlocks the page, gets the glock and returns AOP_TRUNCATED_PAGE, the
second does the actual readpage and unlocks the glock & page as
required.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2008-03-31 10:41:12 +01:00
..
locking [GFS2] proper extern for gfs2/locking/dlm/mount.c:gdlm_ops 2008-03-31 10:41:09 +01:00
acl.c Introduce is_owner_or_cap() to wrap CAP_FOWNER use with fsuid check 2007-07-17 12:00:03 -07:00
acl.h
bmap.c [GFS2] Get inode buffer only once per block map call 2008-03-31 10:40:58 +01:00
bmap.h [GFS2] Remove function gfs2_get_block 2008-01-25 08:08:25 +00:00
daemon.c [GFS2] Move gfs2_logd into log.c 2008-01-25 08:07:56 +00:00
daemon.h [GFS2] Move gfs2_logd into log.c 2008-01-25 08:07:56 +00:00
dir.c [GFS2] be*_add_cpu conversion 2008-03-31 10:41:03 +01:00
dir.h [GFS2] Clean up inode number handling 2007-07-09 08:22:24 +01:00
eaops.c [GFS2] Remove unrequired code 2008-01-25 08:08:13 +00:00
eaops.h [GFS2] mark struct *_operations const 2007-10-10 08:55:03 +01:00
eattr.c [GFS2] Eliminate (almost) duplicate field from gfs2_inode 2008-03-31 10:40:55 +01:00
eattr.h
gfs2.h
glock.c [GFS2] Fix bug where we called drop_bh incorrectly 2008-03-31 10:41:01 +01:00
glock.h [GFS2] Fix a page lock / glock deadlock 2008-03-31 10:41:12 +01:00
glops.c [GFS2] Remove rgrp and glock version numbers 2008-03-31 10:40:29 +01:00
glops.h
incore.h [GFS2] Eliminate (almost) duplicate field from gfs2_inode 2008-03-31 10:40:55 +01:00
inode.c [GFS2] Fix a page lock / glock deadlock 2008-03-31 10:41:12 +01:00
inode.h [GFS2] Eliminate (almost) duplicate field from gfs2_inode 2008-03-31 10:40:55 +01:00
Kconfig [GFS2] Eliminate (almost) duplicate field from gfs2_inode 2008-03-31 10:40:55 +01:00
locking.c
log.c [GFS2] Only do lo_incore_commit once 2008-03-31 10:39:54 +01:00
log.h [GFS2] Move gfs2_logd into log.c 2008-01-25 08:07:56 +00:00
lops.c [GFS2] Plug an unlikely leak 2008-03-31 10:40:05 +01:00
lops.h [GFS2] Only do lo_incore_commit once 2008-03-31 10:39:54 +01:00
main.c [GFS2] Allocate gfs2_rgrpd from slab memory 2008-03-31 10:40:07 +01:00
Makefile [GFS2] Remove lm.[ch] and distribute content 2008-03-31 10:40:26 +01:00
meta_io.c [GFS2] Fix typo 2008-01-25 08:19:51 +00:00
meta_io.h [GFS2] Remove useless i_cache from inodes 2008-01-25 08:07:16 +00:00
mount.c [GFS2] Add NULL entry to token table 2007-10-10 08:55:34 +01:00
mount.h
ops_address.c [GFS2] Fix a page lock / glock deadlock 2008-03-31 10:41:12 +01:00
ops_address.h [GFS2] Remove function gfs2_get_block 2008-01-25 08:08:25 +00:00
ops_dentry.c [GFS2] Fix a page lock / glock deadlock 2008-03-31 10:41:12 +01:00
ops_dentry.h
ops_export.c Convert ERR_PTR(PTR_ERR(p)) instances to ERR_CAST(p) 2008-02-07 08:42:26 -08:00
ops_file.c [GFS2] gfs2/ops_file.c should #include "ops_inode.h" 2008-03-31 10:41:06 +01:00
ops_fstype.c [GFS2] Remove rgrp and glock version numbers 2008-03-31 10:40:29 +01:00
ops_fstype.h exportfs: make struct export_operations const 2007-10-22 08:13:21 -07:00
ops_inode.c [GFS2] Fix a page lock / glock deadlock 2008-03-31 10:41:12 +01:00
ops_inode.h [GFS2] Remove lock methods for lock_nolock protocol 2008-01-25 08:08:15 +00:00
ops_super.c [GFS2] Remove lm.[ch] and distribute content 2008-03-31 10:40:26 +01:00
ops_super.h [PATCH] Mark struct super_operations const 2007-02-12 09:48:47 -08:00
quota.c [GFS2] Reduce inode size by moving i_alloc out of line 2008-01-25 08:18:25 +00:00
quota.h
recovery.c [GFS2] Remove lm.[ch] and distribute content 2008-03-31 10:40:26 +01:00
recovery.h
rgrp.c [GFS2] Add extent allocation to block allocator 2008-03-31 10:40:47 +01:00
rgrp.h [GFS2] Add extent allocation to block allocator 2008-03-31 10:40:47 +01:00
super.c [GFS2] Streamline indirect pointer tree height calculation 2008-03-31 10:39:46 +01:00
super.h [GFS2] Remove lm.[ch] and distribute content 2008-03-31 10:40:26 +01:00
sys.c [GFS2] Remove unused counters 2008-03-31 10:40:34 +01:00
sys.h
trans.c [GFS2] Update gfs2_trans_add_unrevoke to accept extents 2008-03-31 10:40:42 +01:00
trans.h [GFS2] Update gfs2_trans_add_unrevoke to accept extents 2008-03-31 10:40:42 +01:00
util.c [GFS2] Remove lm.[ch] and distribute content 2008-03-31 10:40:26 +01:00
util.h [GFS2] Remove lm.[ch] and distribute content 2008-03-31 10:40:26 +01:00