user/sven/linux.git/include/linux/jbd_common.h, branch v3.14.29

jbd/jbd2: relocate bit_spinlock header to jbd_common

2013-06-13T03:02:35Z

The bit_spinlock functions are only used for the jbd_lock_bh_state functions (and friends) in jbd_common.h and are not directly used by either of jbd.h or jbd2.h content. The jbd_common file is new as of commit 446066724c36 ("jdb/jbd2: factor out common functions from the jbd[2] header files") but common (and isolated) headers were not considered for factoring at that time. Signed-off-by: Paul Gortmaker Signed-off-by: "Theodore Ts'o"

jbd2: refine waiting for shadow buffers

2013-06-04T16:08:56Z

Currently when we add a buffer to a transaction, we wait until the buffer is removed from BJ_Shadow list (so that we prevent any changes to the buffer that is just written to the journal). This can take unnecessarily long as a lot happens between the time the buffer is submitted to the journal and the time when we remove the buffer from BJ_Shadow list. (e.g. We wait for all data buffers in the transaction, we issue a cache flush, etc.) Also this creates a dependency of do_get_write_access() on transaction commit (namely waiting for data IO to complete) which we want to avoid when implementing transaction reservation. So we modify commit code to set new BH_Shadow flag when temporary shadowing buffer is created and we clear that flag once IO on that buffer is complete. This allows do_get_write_access() to wait only for BH_Shadow bit and thus removes the dependency on data IO completion. Reviewed-by: Zheng Liu Signed-off-by: Jan Kara Signed-off-by: "Theodore Ts'o"

ext4: create a new BH_Verified flag to avoid unnecessary metadata validation

2012-04-29T22:21:10Z

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 Signed-off-by: "Theodore Ts'o"

jdb/jbd2: factor out common functions from the jbd[2] header files

2011-10-27T08:38:18Z

The state bits and the lock functions of jbd and jbd2 are identical. Share them. Signed-off-by: Thomas Gleixner Signed-off-by: "Theodore Ts'o"