Subject: 'kill -9' not always working...
To: None <firstname.lastname@example.org>
From: Steven M. Bellovin <email@example.com>
Date: 01/01/2006 11:10:51
'kill -9' doesn't always work for me. Because of the circumstances, I
suspect a race condition.
I hae problems with a Verizon EVDO card; I posted about them a little
while ago. This note is about a problem when I try to kill pppd.
If, in the root window that's running pppd, I do ^Z and 'kill -9 <pid>',
nothing happens. Not good, but not a big surprise; we've all seen
drivers that wedge in the kernel.
If, however, I do the 'kill -9' from a second window, it works. That
suggests some problem about killing a stopped process, especially if
it's slightly stuck on something todo with a device driver.
--Steven M. Bellovin, http://www.cs.columbia.edu/~smb