freebsd with flexible iflib nic queues
7c76d5ca4e
generating a trap 12 panic. The code blindly assumed that in the event of a transmit error, the packet that caused the error would still be at the head of the driver's transmit queue (sc->xl_cdata.xl_tx_head). However in the case of error 82 (which indicates that a transmit error occurred after part of the transmit FIFO memory has been reclaimed) this is not true: the TX queue has already been flushed, and the pointer to the head of the queue is NULL, so trying to dereference the pointer to find the transmit descriptor address causes a crash. The code now checks for a NULL pointer before trying to reload the chip's download pointer register. There may still be error messages printed warning of the transmit error, but no panic should occur. Note that this eror code is only generated with "cyclone" chipsets (3c900B, 3c905B, and presumeably the 3c980 server adapter). It should only appear during periods of heavy traffic, probably only on non-switched networks. Problem reported by: Darcy Buskermolen <darcy@ok-connect.com> |
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| bin | ||
| contrib | ||
| crypto | ||
| etc | ||
| games | ||
| gnu | ||
| include | ||
| kerberos5 | ||
| kerberosIV | ||
| lib | ||
| libexec | ||
| lkm | ||
| release | ||
| sbin | ||
| secure | ||
| share | ||
| sys | ||
| tools | ||
| usr.bin | ||
| usr.sbin | ||
| COPYRIGHT | ||
| Makefile | ||
| Makefile.inc0 | ||
| Makefile.inc1 | ||
| Makefile.upgrade | ||
| README | ||
This is the top level of the FreeBSD source directory. This file was last revised on: $Id: README,v 1.11 1997/08/09 14:36:20 jkh Exp $ For copyright information, please see the file COPYRIGHT in this directory (additional copyright information also exists for some sources in this tree - please see the specific source directories for more information). The Makefile in this directory supports a number of targets for building components (or all) of the FreeBSD source tree, the most commonly used one being ``world'', which rebuilds and installs everything in the FreeBSD system from the source tree except the kernel and the contents of /etc. Please see the top of the Makefile in this directory for more information on the standard build targets and compile-time flags. Building a kernel with config(8) is a somewhat more involved process, documentation for which can be found at: http://www.freebsd.org/handbook/kernelconfig.html And in the config(8) man page. The sample kernel configuration files reside in the sys/i386/conf sub-directory (assuming that you've installed the kernel sources), the file named GENERIC being the one used to build your initial installation kernel. The file LINT contains entries for all possible devices, not just those commonly used, and is meant more as a general reference than an actual kernel configuration file (a kernel built from it wouldn't even run). Source Roadmap: --------------- bin System/User commands. contrib Packages contributed by 3rd parties. crypto Export controlled stuff (see crypto/README). etc Template files for /etc games Amusements. gnu Various commands and libraries under the GNU Public License. Please see gnu/COPYING* for more information. include System include files. kerberosIV Kerberos package - also export controlled. lib System libraries. libexec System daemons. lkm Loadable Kernel Modules. release Release building Makefile & associated tools. sbin System commands. secure DES and DES-related utilities - NOT FOR EXPORT! share Shared resources. sys Kernel sources. tools Utilities for regression testing and miscellaneous tasks. usr.bin User commands. usr.sbin System administration commands. For information on synchronizing your source tree with one or more of the FreeBSD Project's development branches, please see: http://www.freebsd.org/handbook/synching.html