CVSROOT: /cvs
Module name: src
Changes by: [email protected] 2016/03/06 12:15:23
Modified files:
sys/kern : vfs_bio.c
Log message:
Do not fetch the same block multiple times if it is already present
in the buffer cache.
When the Dynamic Buffer Cache has been introduced bread_cluster()
became the replacement of cluster_read(). However this function
did not consider the B_CACHE flag of the first buffer of a cluster
like its predecessor did.
This improves a lot read operations on MSDOSFS while reducing the
number of DMA operations.
ok beck@
