tree 39d657139336012f05d7573116a0ba2405e85de7
parent a26a185d27b49e1656b335ef8ad1a32f7a0e7d7f
author Henry C Chang <henry.cy.chang@gmail.com> 1305109794 +0000
committer Sage Weil <sage@newdream.net> 1305135888 -0700

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>