Arjan van de Ven wrote:
+static inline void delayacct_blkio(void)
+{
+ if (unlikely(current->delays && delayacct_on))
+ __delayacct_blkio();
+}
why is this unlikely?
delayacct_on is expected to be off most of the time, hence the compound is
unlikely too.
+ u64 blkio_delay; /* wait for sync block io completion */
this misses O_SYNC, msync(), and general throttling.
Hmm, that it does :-(
I get the feeling this is being measured at the wrong level
currently.... since the number of entry points that needs measuring at
the current level is hardly finite...
Will take another look if it can be done elsewhere. Earlier was using
io_schedule but that isn't
called from everywhere.
--Shailabh
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