Messages in this thread Patch in this message | | | Date | Sun, 12 Jun 2011 23:18:24 +0800 | From | Wu Fengguang <> | Subject | [PATCH 3/3] writeback: show bdi write bandwidth in debugfs |
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Add a "BdiWriteBandwidth" entry and indent others in /debug/bdi/*/stats.
btw, increase digital field width to 10, for keeping the possibly huge BdiWritten number aligned at least for desktop systems.
Impact: this could break user space tools if they are dumb enough to depend on the number of white spaces.
CC: Theodore Ts'o <tytso@mit.edu> CC: Jan Kara <jack@suse.cz> CC: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> --- mm/backing-dev.c | 24 +++++++++++++----------- 1 file changed, 13 insertions(+), 11 deletions(-)
--- linux-next.orig/mm/backing-dev.c 2011-06-12 20:57:03.000000000 +0800 +++ linux-next/mm/backing-dev.c 2011-06-12 20:58:28.000000000 +0800 @@ -92,23 +92,25 @@ static int bdi_debug_stats_show(struct s #define K(x) ((x) << (PAGE_SHIFT - 10)) seq_printf(m, - "BdiWriteback: %8lu kB\n" - "BdiReclaimable: %8lu kB\n" - "BdiDirtyThresh: %8lu kB\n" - "DirtyThresh: %8lu kB\n" - "BackgroundThresh: %8lu kB\n" - "BdiWritten: %8lu kB\n" - "b_dirty: %8lu\n" - "b_io: %8lu\n" - "b_more_io: %8lu\n" - "bdi_list: %8u\n" - "state: %8lx\n", + "BdiWriteback: %10lu kB\n" + "BdiReclaimable: %10lu kB\n" + "BdiDirtyThresh: %10lu kB\n" + "DirtyThresh: %10lu kB\n" + "BackgroundThresh: %10lu kB\n" + "BdiWritten: %10lu kB\n" + "BdiWriteBandwidth: %10lu kBps\n" + "b_dirty: %10lu\n" + "b_io: %10lu\n" + "b_more_io: %10lu\n" + "bdi_list: %10u\n" + "state: %10lx\n", (unsigned long) K(bdi_stat(bdi, BDI_WRITEBACK)), (unsigned long) K(bdi_stat(bdi, BDI_RECLAIMABLE)), K(bdi_thresh), K(dirty_thresh), K(background_thresh), (unsigned long) K(bdi_stat(bdi, BDI_WRITTEN)), + (unsigned long) K(bdi->write_bandwidth), nr_dirty, nr_io, nr_more_io,
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