Seigo Tanimura (tanimura) posted the initial delta.
I've polished it quite a bit reducing the need for locking and
adapting it for KSE.
Locks:
1 mutex in each filedesc
protects all the fields.
protects "struct file" initialization, while a struct file
is being changed from &badfileops -> &pipeops or something
the filedesc should be locked.
1 mutex in each struct file
protects the refcount fields.
doesn't protect anything else.
the flags used for garbage collection have been moved to
f_gcflag which was the FILLER short, this doesn't need
locking because the garbage collection is a single threaded
container.
could likely be made to use a pool mutex.
1 sx lock for the global filelist.
struct file * fhold(struct file *fp);
/* increments reference count on a file */
struct file * fhold_locked(struct file *fp);
/* like fhold but expects file to locked */
struct file * ffind_hold(struct thread *, int fd);
/* finds the struct file in thread, adds one reference and
returns it unlocked */
struct file * ffind_lock(struct thread *, int fd);
/* ffind_hold, but returns file locked */
I still have to smp-safe the fget cruft, I'll get to that asap.
instead of relying on the previous filters to be present.
Back out r1.125, as a reset is needed to unload any existing microcode,
(which clears the multicast addresses), as it is superceded by this change.
mutex releases to not require flags for the cases when preemption is
not allowed:
The purpose of the MTX_NOSWITCH and SWI_NOSWITCH flags is to prevent
switching to a higher priority thread on mutex releease and swi schedule,
respectively when that switch is not safe. Now that the critical section
API maintains a per-thread nesting count, the kernel can easily check
whether or not it should switch without relying on flags from the
programmer. This fixes a few bugs in that all current callers of
swi_sched() used SWI_NOSWITCH, when in fact, only the ones called from
fast interrupt handlers and the swi_sched of softclock needed this flag.
Note that to ensure that swi_sched()'s in clock and fast interrupt
handlers do not switch, these handlers have to be explicitly wrapped
in critical_enter/exit pairs. Presently, just wrapping the handlers is
sufficient, but in the future with the fully preemptive kernel, the
interrupt must be EOI'd before critical_exit() is called. (critical_exit()
can switch due to a deferred preemption in a fully preemptive kernel.)
I've tested the changes to the interrupt code on i386 and alpha. I have
not tested ia64, but the interrupt code is almost identical to the alpha
code, so I expect it will work fine. PowerPC and ARM do not yet have
interrupt code in the tree so they shouldn't be broken. Sparc64 is
broken, but that's been ok'd by jake and tmm who will be fixing the
interrupt code for sparc64 shortly.
Reviewed by: peter
Tested on: i386, alpha
hw.midi.debug and hw.midi.seq.debug to 1 to enable debug log.
- Make debug messages human-frendly.
- Implement /dev/music.
- Add a timer engine required by /dev/music.
- Fix nonblocking I/O.
- Fix the numbering of midi and synth devices.
firmware to delay completion of commands so that it can attempt to batch
a bunch of completions at once- either returning 16 bit handles in mailbox
registers, or in a resposne queue entry that has a whole wad of 16 bit handles.
Distinguish between 2300 and 2312 chipsets- if only because the revisions
on the chips have different meanings.
Add more instrumentation plus ISP_GET_STATS and ISP_CLR_STATS ioctls.
Run up the maximum number of response queue entities we'll look at
per interrupt.
If we haven't set HBA role yet, always return success from isp_fc_runstate.
MFC after: 2 weeks
date: 2000/02/29 21:37:01; author: augustss; state: Exp;
Distinguish between device and interface classes.
(I finally found a document that said that they were different.)
This gives a bit of a sluggish console, but it prevents the console from
getting stuck if we poll too fast, as well as other badness on certain
machines.
2. Fix a test for != 0 that should have been > 0.
Noticed by: Jamey Wood <Jamey.Wood@Sun.COM> and myself
Submitted by: tmm (2)
- Move from msleep/wakeup to condvar.
- Return either zero or a positive errno value from a function.
Return additional result via references.
- Unify the typedef of callback functions.
Reviewed by: Brooks Davis <brooks@freebsd.org>
Warner Losh <imp@freebsd.org>
Approved by: Brooks Davis <brooks@freebsd.org>
Warner Losh <imp@freebsd.org>
a packed array so sizeof work. This broke RFMON mode and passing
up 802.11 packets.
The Linux emulation code was derived from the open source Linux driver to
maintain compatibility.
LEAP support is added, hints from Richard Johnson. I've verified this
locally with PC350v42510.img firmware. More bug fixing from Marco to
fix long passwords.
Change DELAYs in flash part of driver to FLASH_DELAY which uses tsleep
so it doesn't look like your system died during a flash update.
Install header files in /usr/include/dev/an
Cleanup some ifmedia bugs add "Home" key mode to ifmedia and ancontrol.
This way you can manage 2 keys a little easier. Map the home mode into
key 5. Enhance ifconfig to dump the various configured SSIDs. I use
a bunch of different ones and roam between them. Use the syntax similar
to the WEP keys to deal with setting difference SSIDs.
Bump up up the Card capabilities RID since they added 2 bytes to it
in the latest firmware. Thankfully we changed it from a terminal
failure so the card still worked but the driver whined.
Some cleanup patches from Marco Molteni.
Submitted by: Richard Johnson <raj@cisco.com>
Marco Molteni <molter@tin.it>
and myself
Various checks: David Wolfskill <david@catwhisker.org>
Reviewed by: Brooks Davis <brooks@freebsd.org>
Warner Losh <imp@freebsd.org>
Approved by: Brooks Davis <brooks@freebsd.org>
Warner Losh <imp@freebsd.org>
Obtained from: Linux emulation API's from Aironet driver.
