Andrew Morton wrote:
> 
> Begin forwarded message:
> 
> Date: Fri, 2 Dec 2005 13:53:04 -0800
> From: [EMAIL PROTECTED]
> To: [EMAIL PROTECTED]
> Subject: [Bugme-new] [Bug 5695] New: pppd hangs after disconnect on 
> tty_set_ldisc when sch_htb used
> 
> Software Environment: 
> SMP linux kernel + linux-2.6.13-mppe-mppc-1.3 patch
> 
> Problem Description:
> When i load  sch_htb, some of pppd processes hang after disconnecting on 
> executing 
> ioctl(8, TIOCSETD
> (i run strace -p  <pppd_pid>)
> 
> 'ps -l' shows tty_set_ldisc in WCHAN for this process

I doubt this is really related to HTB. 2.6.15 includes MPPE, can
you reproduce it with a vanilla kernel without any patches?
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