On Mon, Aug 11, 2008 at 11:45:24PM +0530, Aneesh Kumar K.V wrote: > On Mon, Aug 11, 2008 at 08:09:12PM +0530, Aneesh Kumar K.V wrote: > > Can you try this patch ? The patch make group preallocation use the goal > > block. > > > > Results with and without patch. > > http://www.radian.org/~kvaneesh/ext4/lg-fragmentation/ > My results match yours; seems to be a bit better, but it's not fixing the fundamental problem. With the patch: 26524: expecting 638190 actual extent phys 631960 log 1 len 1 26527: expecting 638191 actual extent phys 631963 log 1 len 1 26533: expecting 638192 actual extent phys 631976 log 1 len 5 26534: expecting 638193 actual extent phys 631981 log 1 len 2 26536: expecting 638194 actual extent phys 631984 log 1 len 6 26538: expecting 638195 actual extent phys 631991 log 1 len 5 26540: expecting 638196 actual extent phys 631997 log 1 len 2 26545: expecting 638197 actual extent phys 632009 log 1 len 1 26546: expecting 638198 actual extent phys 632010 log 1 len 6 26604: expecting 638199 actual extent phys 632156 log 1 len 1 Useing debugfs's stat command to look at the blocks: 26524: (0):638189, (1):631960 26527: (0):638190, (1):631963 26533: (0):638191, (1-5):631976-631980 26534: (0):638192, (1-2):631981-631982 26536: (0):638193, (1-6):631984-631989 26538: (0):638194, (1-5):631991-631995 26540: (0):638195, (1-2):631997-631998 26545: (0):638196, (1):632009 26546: (0):638197, (1-6):632010-632015 Out of curiosity, I also probed the inode numbers that were out of sequence from above. They seem to be mostly allocating out of the numbers used for the second extent, above. 26526: (0):631961 26526: (0):631962 26528: (0):631964 26529: (0):411742 26530: (0):631965 26531: (0-1):631966-631967 26532: (0-7):631968-631975 26535: (0):631983 26537: (0):631990 26541: (0-7):631999-632006 26542: (0):632007 26543: (0):632008 26544: (0):411743 26547: (0):632016 Inode Pathname 26524 /lib/rhythmbox/plugins/lyrics/LyricsConfigureDialog.py 26525 /lib/rhythmbox/plugins/lyrics/LyrcParser.py 26526 /lib/rhythmbox/plugins/lyrics/LyricsParse.py 26527 /lib/rhythmbox/plugins/lyrics/LyricsConfigureDialog.pyc 26528 /lib/rhythmbox/plugins/lyrics/WinampcnParser.py 26529 /lib/rhythmbox/plugins/magnatune 26530 /lib/rhythmbox/plugins/magnatune/magnatune_logo_color_small.png 26531 /lib/rhythmbox/plugins/magnatune/magnatune.rb-plugin 26532 /lib/rhythmbox/plugins/magnatune/magnatune-prefs.glade 26533 /lib/rhythmbox/plugins/magnatune/MagnatuneSource.pyc 26534 /lib/rhythmbox/plugins/magnatune/__init__.py 26535 /lib/rhythmbox/plugins/magnatune/BuyAlbumHandler.py 26536 /lib/rhythmbox/plugins/magnatune/magnatune-purchase.glade 26537 /lib/rhythmbox/plugins/magnatune/TrackListHandler.py 26538 /lib/rhythmbox/plugins/magnatune/MagnatuneSource.py 26539 /lib/rhythmbox/plugins/magnatune/magnatune_logo_color_tiny.png 26540 /lib/rhythmbox/plugins/magnatune/__init__.pyc 26541 /lib/rhythmbox/plugins/magnatune/magnatune-loading.glade 26542 /lib/rhythmbox/plugins/magnatune/TrackListHandler.pyc 26543 /lib/rhythmbox/plugins/magnatune/BuyAlbumHandler.pyc 26544 /lib/rhythmbox/plugins/audioscrobbler 26546 /lib/rhythmbox/plugins/audioscrobbler/audioscrobbler-prefs.glade 26547 /lib/rhythmbox/plugins/audioscrobbler/audioscrobbler-ui.xml Looks like we still have some problems with the block allocator... - 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
