Hi: I've been trying to apply the patch here: https://lkml.org/lkml/2011/7/18/326 It is great that we can have such fine-grained monitoring on the activity of kernel page cache, isn't it? The author said: My patches are based on the latest "linux-tip.git" tree and also the following 3 commits in "tip:tracing/mm" and a "pagecache object collections" patch. - dcac8cd: tracing/mm: add page frame snapshot trace - 1487a7a: tracing/mm: fix mapcount trace record field - eb46710: tracing/mm: rename 'trigger' file to 'dump_range' - http://lkml.org/lkml/2010/2/9/156 My understanding is: - He was working on the head of linux-tip: https://kernel.googlesource.com/pub/scm/linux/kernel/git/tip/tip/ - The HEAD had cherry-picked from three commits at branch tracing/mm at another repo: https://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git/?h=tracing/mm - Finally, he had also applied a patch posted here: https://lkml.org/lkml/2010/2/9/156 What I did is: 1. Checkout to a commit near 2011/7/18 (the latest commit at the time the patch was sent) 2. Cherry-picked the three commits from tracing/mm 3. Apply the patch I failed at step 3. Anyone has any suggestion on this? Thanks, Yunchih