On Tue, Sep 3, 2013 at 9:43 PM, Weng Meiling <wengmeiling.w...@huawei.com> wrote: > On 2013/9/3 20:05, Dhaval Giani wrote: >> On Fri, Aug 2, 2013 at 4:24 AM, Weng Meiling >> <wengmeiling.w...@huawei.com> wrote: >>> >>> From: Weng Meiling <wengmeiling.w...@huawei.com> >>> >>> When we use cgclear to unload the cgroup filesystem, we still can >>> see the umounted cgroup by using mount command. So fix the problem >>> by call system. >>> >>> From: Weng Meiling <wengmeiling.w...@huawei.com> >> >> NAK >> >> umount system call is the documented way to unmount a filesystem. I >> would like some more investigation as to why this is happening? Can >> you try seeing if you see this behavior with a tmpfs as well? And with >> other filesystems? Is it something that is limited cgroupfs? Does >> using umount2 with MNT_DETACH help after a whlie? >> >> Thanks! >> Dhaval >> >> > This happens only when mount cgroupfs using mount command not cgconfig > service or cgconfigparser. Because when using mount command, it will update > the > /etc/mtab file to record the mounted filesystem. When using cgclear to unload > the cgroupfs, it uses umount2, but the syscall doesn't update the /etc/mtab to > removed the umouted filesystem. So the patch try to using umount8 which will > update the /etc/mtab. The same as other filesystem if they use umount2 to > umount > the filesystem.
As long as /proc/mounts is correct, we don't have a problem. In anycase, /etc/mtab is not the correct way to check mounted filesystems. It is always /proc/mounts. This patch is unnecessary (and dangerous) Thanks! Dhaval ------------------------------------------------------------------------------ Learn the latest--Visual Studio 2012, SharePoint 2013, SQL 2012, more! Discover the easy way to master current and previous Microsoft technologies and advance your career. Get an incredible 1,500+ hours of step-by-step tutorial videos with LearnDevNow. Subscribe today and save! http://pubads.g.doubleclick.net/gampad/clk?id=58040911&iu=/4140/ostg.clktrk _______________________________________________ Libcg-devel mailing list Libcg-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libcg-devel
