Date: Sat, 16 Apr 2005 03:28:02 GMT From: Arcadiy Ivanov <arcadiy@ivanovy.net> To: freebsd-gnats-submit@FreeBSD.org Subject: i386/79990: ng_mppc_decompress dies with ADAPTIVE_GIANT and PREEMTION Message-ID: <200504160328.j3G3S2Wl094049@www.freebsd.org> Resent-Message-ID: <200504160330.j3G3UP0x088145@freefall.freebsd.org>
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>Number: 79990 >Category: i386 >Synopsis: ng_mppc_decompress dies with ADAPTIVE_GIANT and PREEMTION >Confidential: no >Severity: serious >Priority: high >Responsible: freebsd-i386 >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Sat Apr 16 03:30:25 GMT 2005 >Closed-Date: >Last-Modified: >Originator: Arcadiy Ivanov >Release: 5.4-RC2 >Organization: >Environment: FreeBSD fw1.home.ivanovy.net 5.4-RC2 FreeBSD 5.4-RC2 #0: Fri Apr 15 16:13:59 EDT 2005 administrator@fw1.home.ivanovy.net:/usr/obj/usr/src/sys/DELLGX2 i386 >Description: If the kernel of 5.3 or 5.4-RC2 is built with either PREEMTION *OR* ADAPTIVE_GIANT options enabled and mpd-3.18_2 is installed, then after pptp connection is established and runs for a certain time the following kernel message is logged: Apr 15 20:40:58 fw1 kernel: ng_mppc_decompress: too many (4094) packets dropped, disabling node 0xc2248800! Then connection is not dropped but times out after a while with no traffic going in either direction. The problem is always reproducible. >How-To-Repeat: Build a kernel with ADAPTIVE_GIANT or PREEMPTION options enabled. Install and configure port mpd-3.18_2. Start mpd daemon. Establish a connection and begin transfer. After a period of time the above message is always logged and a connection stalls. >Fix: Remove PREEMTION and ADAPTIVE_GIANT options from the kernel and add NO_ADAPTIVE_MUTEXES option. Rebuild kernel. Reboot. Launch mpd daemon. No connection drops happen. >Release-Note: >Audit-Trail: >Unformatted:
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