Un-killable Processes : Red Hat Enterprise Linux

By Johnathan Kupferer, Red Hat Certified Engineer

Before Red Hat Enterprise Linux 4, there really wasn’t a good way to handle processes that had entered an
uninterruptible sleep waiting on an unresponsive NFS server. This was particularly frustrating because the
umount man page promises that “-f” will “Force unmount.” This allows an NFS-mounted filesystem to be
unmounted if the NFS server is “unreachable.” That was how it was supposed to work, with the caveat that
the filesystem must have originally been mounted with “soft” or “intr” options.Well, no more. Though the
man page doesn’t say so, umount -f now comes to the rescue and will unmount hard and uninterruptible
mounts.

About these ads

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

Follow

Get every new post delivered to your Inbox.

%d bloggers like this: