Messages in this thread | | | Date | Tue, 29 Apr 2008 08:36:59 +0400 | From | Michael Tokarev <> | Subject | Re: umount(/proc) after CLONE_NEWNS in 2.6.25? |
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Al Viro wrote: > On Tue, Apr 29, 2008 at 03:06:38AM +0100, Al Viro wrote: > >>> Check the version of umount(8) you've got. And see if that strace happens >>> to have open of /proc/mounts, without matching close by the time it calls >>> umount(). util-linux-ng 2.13.1 is _that_ dumb... >> Umm... Looks like something more odd is going on... > > ... or something much simpler: > > ; cat /proc/mounts |grep proc > proc /proc proc rw,nosuid,nodev,noexec 0 0 > usbfs /proc/bus/usb usbfs rw 0 0 > ; > > and unmounting the stuff mounted under /proc before doing umount /proc > works as expected. Amazing how well the first cup of coffee helps...
Hey. Don't paint ME *that* dumb... ;)
It was indeed the case here. I never tried those things on my home machine before, and decided to experiment, but I forgot that it has /proc/bus/usb mounted. And for comparison I used another machine which does NOT have that filesystem mounted. How.. dum^Wodd... ;)
Please excuse me for the noise.
/mj
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