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    SubjectRe: [PATCH] distributed counters for ext2 to avoid group scaning
    On Sun, Mar 16, 2003 at 06:01:55PM +0300, Alex Tomas wrote:
    >> ext2 with concurrent balloc/ialloc doesn't maintain global free
    >> inodes/blocks counters. this is due to badness of spinlocks and
    >> atomic_t from big iron's viewpoint. therefore, to know these values
    >> we should scan all group descriptors. there are 81 groups for 10G
    >> fs. I believe there is method to avoid scaning and decrease memory
    >> footprint.

    On Mon, Mar 17, 2003 at 01:37:12AM -0800, William Lee Irwin III wrote:
    > benching now

    Bad news. I don't have big enough fs's to do this one. Working it...

    $ df -HT
    Filesystem Type Size Used Avail Use% Mounted on
    /dev/sda2 ext2 4.2G 2.8G 1.2G 72% /
    /dev/sdb1 ext2 9.1G 7.0G 1.6G 82% /home
    /dev/sdb2 ext2 9.1G 42M 8.6G 1% /results
    /dev/sdd1 ext2 19G 8.0G 9.2G 47% /work
    /dev/sde1 ext2 19G 1.7G 16G 10% /test

    -- wli
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