134164f8d3
The Am1771 driver will sometimes do the following: - Some thread-> NdisScheduleWorkItem(some work) - Worker thread -> do some work, KeWaitForSingleObject(some event) - Some other thread -> NdisScheduleWorkItem(some other work) When the second call to NdisScheduleWorkItem() occurs, the NDIS worker thread (in our case ndis taskqueue) is suspended in KeWaitForSingleObject() and waiting for an event to be signaled. This is different from when the worker thread is idle and waiting on NdisScheduleWorkItem() to send it more jobs. However, the ndis_sched() function in kern_ndis.c always calls kthread_resume() when queueing a new job. Normally this would be ok, but here this causes KeWaitForSingleObject() to return prematurely, which is not what we want. To fix this, the NDIS threads created by kern_ndis.c maintain a state variable to indicate whether they are running (scanning the job list and executing jobs) or sleeping (blocked on kthread_suspend() in ndis_runq()), and ndis_sched() will only call kthread_resume() if the thread is in the sleeping state. Note that we can't just check to see if the thread is on the run queue: in both cases, the thread is sleeping, but it's sleeping for different reasons. This stops the Am1771 driver from emitting various "NDIS ERROR" messages and fixes some cases where it crashes.
This is the top level of the FreeBSD source directory. This file was last revised on: $FreeBSD$ 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, the kernel-modules and the contents of /etc. The ``buildkernel'' and ``installkernel'' targets build and install the kernel and the modules (see below). 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 is a somewhat more involved process, documentation for which can be found at: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html And in the config(8) man page. Note: If you want to build and install the kernel with the ``buildkernel'' and ``installkernel'' targets, you might need to build world before. More information is available in the handbook. The sample kernel configuration files reside in the sys/<arch>/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 NOTES contains entries and documentation for all possible devices, not just those commonly used. It is the successor of the ancient LINT file, but in contrast to LINT, it is not buildable as a kernel but a pure reference and documentation file. Source Roadmap: --------------- bin System/user commands. contrib Packages contributed by 3rd parties. crypto Cryptography 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. kerberos5 Kerberos5 (Heimdal) package. lib System libraries. libexec System daemons. release Release building Makefile & associated tools. sbin System commands. secure Cryptographic libraries and commands. 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/doc/en_US.ISO8859-1/books/handbook/synching.html