On Tue, Aug 18, 2009 at 08:42:12PM +0900, Ryo Tsuruta wrote: > 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 The patch attached with your mail is obsolete and it may potentially 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. > Hi Ryo, Thanks. In next posting I will move to latest version of io tracking patches. > 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. Makes sense. In next posting, will move get_cgroup_from_page() to biotrack.c. Thanks Vivek -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
