From aed3bb90abaf0b42e8c8747e192f7bb97f445279 Mon Sep 17 00:00:00 2001 From: Dave Chinner Date: Mon, 11 Jan 2010 11:47:45 +0000 Subject: xfs: Reference count per-ag structures Reference count the per-ag structures to ensure that we keep get/put pairs balanced. Assert that the reference counts are zero at unmount time to catch leaks. In future, reference counts will enable us to safely remove perag structures by allowing us to detect when they are no longer in use. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig Signed-off-by: Alex Elder --- fs/xfs/xfs_ag.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'fs/xfs/xfs_ag.h') diff --git a/fs/xfs/xfs_ag.h b/fs/xfs/xfs_ag.h index 6702bd8..18ae43f 100644 --- a/fs/xfs/xfs_ag.h +++ b/fs/xfs/xfs_ag.h @@ -196,8 +196,8 @@ typedef struct xfs_perag_busy { #define XFS_PAGB_NUM_SLOTS 128 #endif -typedef struct xfs_perag -{ +typedef struct xfs_perag { + atomic_t pag_ref; /* perag reference count */ char pagf_init; /* this agf's entry is initialized */ char pagi_init; /* this agi's entry is initialized */ char pagf_metadata; /* the agf is preferred to be metadata */ -- cgit v1.1