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authorHenry C Chang <henry.cy.chang@gmail.com>2011-05-11 10:29:54 +0000
committerSage Weil <sage@newdream.net>2011-05-11 10:44:48 -0700
commitd3d0720d4a7a46e93e055e5b0f1a8bd612743ed6 (patch)
tree39d657139336012f05d7573116a0ba2405e85de7 /fs/ceph/super.h
parenta26a185d27b49e1656b335ef8ad1a32f7a0e7d7f (diff)
downloadlinux-d3d0720d4a7a46e93e055e5b0f1a8bd612743ed6.tar.bz2
ceph: do not use i_wrbuffer_ref as refcount for Fb cap
We increments i_wrbuffer_ref when taking the Fb cap. This breaks the dirty page accounting and causes looping in __ceph_do_pending_vmtruncate, and ceph client hangs. This bug can be reproduced occasionally by running blogbench. Add a new field i_wb_ref to inode and dedicate it to Fb reference counting. Signed-off-by: Henry C Chang <henry.cy.chang@gmail.com> Signed-off-by: Sage Weil <sage@newdream.net>
Diffstat (limited to 'fs/ceph/super.h')
-rw-r--r--fs/ceph/super.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index b1f1b8bb1271..f5cabefa98dc 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -293,7 +293,7 @@ struct ceph_inode_info {
/* held references to caps */
int i_pin_ref;
- int i_rd_ref, i_rdcache_ref, i_wr_ref;
+ int i_rd_ref, i_rdcache_ref, i_wr_ref, i_wb_ref;
int i_wrbuffer_ref, i_wrbuffer_ref_head;
u32 i_shared_gen; /* increment each time we get FILE_SHARED */
u32 i_rdcache_gen; /* incremented each time we get FILE_CACHE. */