* lazy umount not working (udev & tmpfs on /dev)
@ 2004-10-05 10:11 Meelis Roos
2004-10-05 14:28 ` viro
0 siblings, 1 reply; 3+ messages in thread
From: Meelis Roos @ 2004-10-05 10:11 UTC (permalink / raw)
To: Linux Kernel list
Hi, I'm running 2.6.9-rc3+BK (as of yesterday, 20041004) on a couple of
x86 Debian unstable machines with udev and I'm having problems.
In 2.6.3-rc2 all was OK. Don't know exactly about plain -rc3.
In current BK, lazy umount is not working sometimes. udev start script
mounts tmpfs on /dev and stop script does umount -l /dev. This doesn't
return failure but nothing happens, /dev remain mounted and I can't
start udev again. Doing umount -l /dev by hand again finally umounts it
and udev can be started again. Plain umount /dev of course doesn't work
because /dev is busy.
This behaviour is 100% reproducible.
Since 2.6.9-rc2 was OK, I guess this is a bug in current BK?
--
Meelis Roos (mroos@linux.ee)
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: lazy umount not working (udev & tmpfs on /dev)
2004-10-05 10:11 lazy umount not working (udev & tmpfs on /dev) Meelis Roos
@ 2004-10-05 14:28 ` viro
2004-10-05 15:50 ` Meelis Roos
0 siblings, 1 reply; 3+ messages in thread
From: viro @ 2004-10-05 14:28 UTC (permalink / raw)
To: Meelis Roos; +Cc: Linux Kernel list
On Tue, Oct 05, 2004 at 01:11:33PM +0300, Meelis Roos wrote:
> Hi, I'm running 2.6.9-rc3+BK (as of yesterday, 20041004) on a couple of
> x86 Debian unstable machines with udev and I'm having problems.
>
> In 2.6.3-rc2 all was OK. Don't know exactly about plain -rc3.
>
> In current BK, lazy umount is not working sometimes. udev start script
> mounts tmpfs on /dev and stop script does umount -l /dev. This doesn't
> return failure but nothing happens, /dev remain mounted and I can't
It might be not umount, actually - if you get double mount for any
reason, the first umount -l will strip the top layer, leaving whatever's
beneath it.
Could you add printk to sys_mount() and sys_umount(), so that
we could at least see which one is a problem? Just "called mount"/"called
umount", nothing fancy with arguments...
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: lazy umount not working (udev & tmpfs on /dev)
2004-10-05 14:28 ` viro
@ 2004-10-05 15:50 ` Meelis Roos
0 siblings, 0 replies; 3+ messages in thread
From: Meelis Roos @ 2004-10-05 15:50 UTC (permalink / raw)
To: viro; +Cc: Linux Kernel list
> Could you add printk to sys_mount() and sys_umount(), so that
> we could at least see which one is a problem? Just "called mount"/"called
> umount", nothing fancy with arguments...
Tried it.
Ignoring matching 2 mounts and 2 umounts for /dev/pts and /dev/shm,
there are exactly 2 mounts on udev start and 2 umounts on udev stop.
--
Meelis Roos (mroos@linux.ee)
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2004-10-05 16:00 UTC | newest]
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2004-10-05 10:11 lazy umount not working (udev & tmpfs on /dev) Meelis Roos
2004-10-05 14:28 ` viro
2004-10-05 15:50 ` Meelis Roos
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