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| author | Darrick J. Wong <djwong@us.ibm.com> | 2012-04-29 18:21:10 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2012-04-29 18:21:10 -0400 |
| commit | f84891289e62a74e9b4942eaad80617368b2d778 (patch) | |
| tree | 6e86704a9780dd6ed97f25ba1cd32d59ffebf430 /include | |
| parent | 69964ea4c7b68c9399f7977aa5b9aa6539a6a98a (diff) | |
| download | linux-stable-f84891289e62a74e9b4942eaad80617368b2d778.tar.gz linux-stable-f84891289e62a74e9b4942eaad80617368b2d778.tar.bz2 linux-stable-f84891289e62a74e9b4942eaad80617368b2d778.zip | |
ext4: create a new BH_Verified flag to avoid unnecessary metadata validation
Create a new BH_Verified flag to indicate that we've verified all the
data in a buffer_head for correctness. This allows us to bypass
expensive verification steps when they are not necessary without
missing them when they are.
Signed-off-by: Darrick J. Wong <djwong@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/jbd_common.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/jbd_common.h b/include/linux/jbd_common.h index 6230f8556a4e..6133679bc4c0 100644 --- a/include/linux/jbd_common.h +++ b/include/linux/jbd_common.h @@ -12,6 +12,7 @@ enum jbd_state_bits { BH_State, /* Pins most journal_head state */ BH_JournalHead, /* Pins bh->b_private and jh->b_bh */ BH_Unshadow, /* Dummy bit, for BJ_Shadow wakeup filtering */ + BH_Verified, /* Metadata block has been verified ok */ BH_JBDPrivateStart, /* First bit available for private use by FS */ }; @@ -24,6 +25,7 @@ TAS_BUFFER_FNS(Revoked, revoked) BUFFER_FNS(RevokeValid, revokevalid) TAS_BUFFER_FNS(RevokeValid, revokevalid) BUFFER_FNS(Freed, freed) +BUFFER_FNS(Verified, verified) static inline struct buffer_head *jh2bh(struct journal_head *jh) { |