kern/103411: (Probably) a deadlock caused by rtorrent downloading and checking at high speeds

[Kris Kennaway]

The following reply was made to PR kern/103411; it has been noted by GNATS.

From: Kris Kennaway <kris at obsecurity.org>
To: =?unknown-8bit?Q?V=E1clav?= Haisman <v.haisman at sh.cvut.cz>
Cc: freebsd-gnats-submit at FreeBSD.org
Subject: Re: kern/103411: (Probably) a deadlock caused by rtorrent downloading and checking at high speeds
Date: Tue, 19 Sep 2006 18:17:16 -0400

 On Tue, Sep 19, 2006 at 08:55:01PM +0000, Vclav Haisman wrote:
 
 > FreeBSD logout.sh.cvut.cz 6.2-PRERELEASE FreeBSD 6.2-PRERELEASE #0: Wed Sep 13 00:12:05 CEST 2006     root at logout.sh.cvut.cz:/usr/obj/usr/src/sys/LOGOUT  i386
 > >Description:
 > I have rather repeatable (what seems like) deadlock here. I use rtorrent to download stuff. When there are strong seends I can d/l at megabytes per second together on several torrents. The deadlock happens when rtorrent is downloading from such fast torrents and also checksumming already downloaded files.
 > 
 > I tried to panic the kernel and get dump by breaking into debugger from keyboard but I didn't get useful dump, because savecore didn't dump it from swap, maybe next time.
 
 Let us know when you have a useable dump, there's nothing that can be
 done about your PR until then.
 
 Kris