Aneesh Kumar K.V wrote: > Currently locality group prealloc list is freed only when there is a block allocation > failure. This can result in large number of per cpu locality group prealloc space > and also make the ext4_mb_use_preallocated expensive. Convert the locality group > prealloc list to a hash list. The hash index is the order of number of blocks > in the prealloc space with a max order of 9. When adding prealloc space to the > list we make sure total entries for each order does not exceed 8. If it is more > than 8 we discard few entries and make sure the we have only <= 5 entries. > This looks better on the particular benchmark: http://people.redhat.com/esandeen/ext4/fs_mark.png contains a run with this patch. I must admit to not actually reading the patch yet, though :) Just ran it in the background while working on some other things today. -Eric -- 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
