Hi Vivek, Vivek Goyal <vgoyal@xxxxxxxxxx> wrote: > o blkio_cgroup patches from Ryo to track async bios. > > o Fernando is also working on another IO tracking mechanism. We are not > particular about any IO tracking mechanism. This patchset can make use > of any mechanism which makes it to upstream. For the time being making > use of Ryo's posting. The patch attached with your mail is obsolete and it may potentially cause a deadlock when lock_page_cgroup() is called under radix_tree->lock. http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=e767e0561d7fd2333df1921f1ab4176211f9036b The latest blkio-cgroup fixes the above issue and reduces IO tracking overhead since lock_page_cgroup() is no longer used. I would recommend to update to the latest version. And I have a suggestion, how about moving get_cgroup_from_page() to biotrack.c, I think this function would be useful for people who want to make use of the IO tracking mechanism. Please let me know your opinion. Thanks, Ryo Tsuruta -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
