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SubjectRe: pivot_root solved by patch to 2.4.22-pre7
In gmane.linux.kernel, you wrote:
>> the unshare_files change causes init to no longer share the same fd table
>> with the other kernel threads. thus, when init closes or opens fds it does
>
> Ah yes.. because of do_basic_setup. Having /sbin/init sharing with
> kernel threads doesn't actually strike me as too clever anyway although
> none of them should be using fd stuff.
>
> In which case I guess we should call unshare_files directly before we
> open /dev/console in init/main.c.

Is this going to be fixed for 2.4.22? In -rc2, I still get this after
pivot_root (I'm using pivot_root, but not initrd):

halfoat:0:~ # umount /mnt
umount: /mnt: device is busy
halfoat:1:~ # lsof /mnt
COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME
keventd 2 root 0u CHR 5,1 21 /mnt/dev/console
keventd 2 root 1u CHR 5,1 21 /mnt/dev/console
keventd 2 root 2u CHR 5,1 21 /mnt/dev/console
ksoftirqd 3 root 0u CHR 5,1 21 /mnt/dev/console
ksoftirqd 3 root 1u CHR 5,1 21 /mnt/dev/console
ksoftirqd 3 root 2u CHR 5,1 21 /mnt/dev/console
ksoftirqd 4 root 0u CHR 5,1 21 /mnt/dev/console
ksoftirqd 4 root 1u CHR 5,1 21 /mnt/dev/console
ksoftirqd 4 root 2u CHR 5,1 21 /mnt/dev/console
kswapd 5 root 0u CHR 5,1 21 /mnt/dev/console
kswapd 5 root 1u CHR 5,1 21 /mnt/dev/console
kswapd 5 root 2u CHR 5,1 21 /mnt/dev/console
bdflush 6 root 0u CHR 5,1 21 /mnt/dev/console
bdflush 6 root 1u CHR 5,1 21 /mnt/dev/console
bdflush 6 root 2u CHR 5,1 21 /mnt/dev/console
kupdated 7 root 0u CHR 5,1 21 /mnt/dev/console
kupdated 7 root 1u CHR 5,1 21 /mnt/dev/console
kupdated 7 root 2u CHR 5,1 21 /mnt/dev/console
kjournald 64 root 0u CHR 5,1 21 /mnt/dev/console
kjournald 64 root 1u CHR 5,1 21 /mnt/dev/console
kjournald 64 root 2u CHR 5,1 21 /mnt/dev/console

Jason
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