13 Jun, 2013
1 commit
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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"
05 Jun, 2013
1 commit
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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"
30 Apr, 2012
1 commit
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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"
27 Oct, 2011
1 commit
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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"
