On Wed, Apr 01, 2015 at 07:34:19PM -0700, Darrick J. Wong wrote: > This patch adds to e2fsck the ability to pre-fetch metadata into the > page cache in the hopes of speeding up fsck runs. There are two new > functions -- the first allows a caller to readahead a list of blocks, > and the second is a helper function that uses that first mechanism to > load group data (bitmaps, inode tables). > > These new e2fsck routines require the addition of a dblist API to > allow us to iterate a subset of a dblist. This will enable > incremental directory block readahead in e2fsck pass 2. > > There's also a function to estimate the readahead given a FS. > > v2: Add an API to create a dblist with a given number of list elements > pre-allocated. This enables us to save ~2ms per call to > e2fsck_readahead() (assuming a 2MB RA buffer) by not having to > repeatedly call ext2_resize_mem as we add blocks to the list. > > v3: Instead of creating dblists of arbitrary size, change the dblist > iterator to allow iterating a sub-range. This eliminates a lot of > unnecessary list copying during e2fsck part2. > > Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx> Thanks, applied. - Ted -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
