On Mon, Dec 1, 2014 at 4:54 PM, Jan Kara <jack@xxxxxxx> wrote: > Hello, > > On Mon 01-12-14 12:32:05, Zhi Yong Wu wrote: >> I'd like to attend LSF/MM summit, been very interested in the >> discussion related to VFS, ext4, xfs, btrfs, and memory management; >> and would like to discuss some FS perf stuff with others. > Can you be more specific what performance discussions are you interested > in? Thanks. e.g. 1. resize2fs/resize4fs is one of them. When ext4 fs is resized by a big size, you can see that its performance is much worse than windows ntfsresize. Below is some perf data: 1.) single fsresize operation orig_fssize -> new_fsresize ext4 ntfs (mm:ss) 71680M -> 174080M 0:43.96 0:14.43 174080M -> 276480M 0:47.52 0:13.66 276480M -> 378880M 0:51.13 0:13.93 378880M -> 481280M 0:56.96 0:13.40 481280M -> 1505280M 5:57.19 0:32.29 2.) 4 fsresize operation in parallel orig_fssize -> new_fsresize ext4 ntfs (mm:ss) 174080M -> 276480M 1:05.83 0:38.87 276480M -> 378880M 1:08.39 0:34.69 378880M -> 481280M 1:12.55 0:35.26 481280M -> 1505280M 7:35.15 0:40.12 2. another perf issue is being resolved by Ted's lazytime patchset. :) > > Honza > -- > Jan Kara <jack@xxxxxxx> > SUSE Labs, CR -- Regards, Zhi Yong Wu -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html