kern/112053: deadlock with almost full filesystem and rtorrent

[Wes Morgan]

>Number:         112053
>Category:       kern
>Synopsis:       deadlock with almost full filesystem and rtorrent
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Apr 23 20:40:14 GMT 2007
>Closed-Date:
>Last-Modified:
>Originator:     Wes Morgan
>Release:        6.2-STABLE
>Organization:
>Environment:
FreeBSD volatile 6.2-STABLE FreeBSD 6.2-STABLE #27: Sun Apr 22 10:09:41 EDT 2007     root at volatile:/usr/src/sys/i386/compile/VOLATILE  i386

>Description:
With a nearly full /usr filesystem, on a gconcat volume consisting of two 300gb drives and 1 500gb drive, using rtorrent (/usr/ports/net-p2p/rtorrent-devel) to allocate space for torrents that would cause the system to run out of space puts the system into a state where any filesystem activity will hang the process.

>How-To-Repeat:
Fill up your volume to nearly full, have rtorrent create the files for torrents (note - not necessary to DOWNLOAD them) that would cause the volume to run out of space. Rtorrent should immediately hang, and any process attempting to access the filesystem will also hang.
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: