This patchset adds a new procfs interface to extrace information about pagecache status. In-kernel tool tools/vm/page-types.c has already some code for pagecache scanning without kernel's help, but it's not free from measurement-disturbance, so here I'm suggesting another approach. Patch 1/4 changes radix tree API to support ranged iteration as a preparation for patch 2/4 which adds /proc/kpagecache. Patch 3/4 changes page-types to use the interface in file scanning mode. Patch 4/4 is documentation update. This patchset were previously posted as a part of memory error reporting patchset (http://lwn.net/Articles/590690/), so changelogs in individual patches are changes from that version. Thanks, Naoya Horiguchi --- Summary: Naoya Horiguchi (4): radix-tree: add end_index to support ranged iteration fs/proc/page.c: introduce /proc/kpagecache interface tools/vm/page-types.c: rework on file cache scanning mode Documentation: update Documentation/vm/pagemap.txt Documentation/vm/pagemap.txt | 29 +++++ drivers/gpu/drm/qxl/qxl_ttm.c | 2 +- fs/proc/page.c | 105 ++++++++++++++++ include/linux/fs.h | 9 +- include/linux/radix-tree.h | 27 +++-- kernel/irq/irqdomain.c | 2 +- lib/radix-tree.c | 8 +- mm/filemap.c | 8 +- tools/vm/page-types.c | 276 +++++++++++++++++------------------------- 9 files changed, 284 insertions(+), 182 deletions(-) -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>