changes to the ATA driver cause a kernel crash, no fault of the ATA
code. Work is in progress to add the necessary feature to the sparc64
kernel and this commit will be backed out when it is complete. This
bandaid is being put in mostly in the interests of getting the first
release snapshot done and out the door.
Tested on: Ultra-10 exhibiting the insta-panic.
MFC: Real Soon
If the bioq is empty, NULL is returned. Otherwise the front element
is removed and returned.
This can simplify locking in many drivers from:
lock()
bp = bioq_first(bq);
if (bp == NULL) {
unlock()
return
}
bioq_remove(bp, bq)
unlock
to:
lock()
bp = bioq_takefirst(bq);
unlock()
if (bp == NULL)
return;
Since pmap_enter() calls pmap_invalidate_page(), which needs interrupts
enabled in the SMP case, we defer the disable to right before saving the
register context. This has been incorrect for about a year but caused no
real problems because the identity page never actually replaces a previously
mapped page and suspend/resume on SMP systems has been uncommon.
Tested by: sos
MFC after: 3 days
the ipfw KLD.
For IPFIREWALL_FORWARD this does not have any side effects. If the module
has it but not the kernel it just doesn't do anything.
For IPDIVERT the KLD will be unloadable if the kernel doesn't have IPDIVERT
compiled in too. However this is the least disturbing behaviour. The user
can just recompile either module or the kernel to match the other one. The
access to the machine is not denied if ipfw refuses to load.
have been unified with that of msleep(9), further refine the sleepq
interface and consolidate some duplicated code:
- Move the pre-sleep checks for theaded processes into a
thread_sleep_check() function in kern_thread.c.
- Move all handling of TDF_SINTR to be internal to subr_sleepqueue.c.
Specifically, if a thread is awakened by something other than a signal
while checking for signals before going to sleep, clear TDF_SINTR in
sleepq_catch_signals(). This removes a sched_lock lock/unlock combo in
that edge case during an interruptible sleep. Also, fix
sleepq_check_signals() to properly handle the condition if TDF_SINTR is
clear rather than requiring the callers of the sleepq API to notice
this edge case and call a non-_sig variant of sleepq_wait().
- Clarify the flags arguments to sleepq_add(), sleepq_signal() and
sleepq_broadcast() by creating an explicit submask for sleepq types.
Also, add an explicit SLEEPQ_MSLEEP type rather than a magic number of
0. Also, add a SLEEPQ_INTERRUPTIBLE flag for use with sleepq_add() and
move the setting of TDF_SINTR to sleepq_add() if this flag is set rather
than sleepq_catch_signals(). Note that it is the caller's responsibility
to ensure that sleepq_catch_signals() is called if and only if this flag
is passed to the preceeding sleepq_add(). Note that this also removes a
sched_lock lock/unlock pair from sleepq_catch_signals(). It also ensures
that for an interruptible sleep, TDF_SINTR is always set when
TD_ON_SLEEPQ() is true.
has only been partly initialized via newfs(8) so that it applies to both
UFS1 and UFS2.
Submitted by: "Xin LI" delphij at frontfree dot net
MFC: maybe?
lock is not held.
Rather than annotating that the lock is released after calls to
unp_detach() with a comment, annotate with an assertion.
Assert that the UNIX domain socket subsystem lock is not held when
unp_externalize() and unp_internalize() are called.
This provides greater context for the locking and allows us to avoid
locking the pcbinfo structure if not binding operations will take
place (i.e., already bound, connected, and no expliti sendto()
address).
GP register, because it's clobbered for calls across load modules. The
previous commit inserted the call to _init_tls() between the call to
atexit() and the restoration of the GP register clobbered by it. Fix:
restore GP before we call _init_tls().
Pointy hat: dfr@
