Public bug reported: please backport this patch:
http://lkml.indiana.edu/hypermail/linux/kernel/1209.1/00354.html this also affects online resizing of file systems, in my case extending a 4T fs to 5T proceeded at a speed of 10 MB/s, using 100% of one CPU core for a day, mostly in 32.62% [kernel] [k] ext4_get_group_desc 31.40% [kernel] [k] count_overhead (snapshot from perf top) running kernel: 3.2.0-31-generic #50-Ubuntu SMP Fri Sep 7 16:16:45 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux ** Affects: linux (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1078381 Title: regression: mounting/resizing large file systems is slow on 3.2 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1078381/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
