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4079c2dd69
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6143 Commits

Author SHA1 Message Date
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4079c2dd69 Use pool_cache+atomics for sigacts. 2008-04-25 11:24:11 +00:00
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607f7941b7 Remove unneeded playing about with kernel_lock. 2008-04-25 11:23:42 +00:00
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1ae2046c17 semexit: do nothing if the process has not used semaphores. 2008-04-25 11:21:18 +00:00
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8c71a574b0 Remove unneeded kernel_lock/splvm stuff. 2008-04-25 00:07:24 +00:00
alc
8c99fcbe3b fix typo in comment 2008-04-24 23:26:00 +00:00
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3cef738139 lwp_userret: don't drop p_lock while holding a scheduler lock. 2008-04-24 21:47:11 +00:00
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284c2b9aef Merge proc::p_mutex and proc::p_smutex into a single adaptive mutex, since 
we no longer need to guard against access from hardware interrupt handlers.

Additionally, if cloning a process with CLONE_SIGHAND, arrange to have the
child process share the parent's lock so that signal state may be kept in
sync. Partially addresses PR kern/37437.
 2008-04-24 18:39:20 +00:00
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6d70f903e6 Network protocol interrupts can now block on locks, so merge the globals 
proclist_mutex and proclist_lock into a single adaptive mutex (proc_lock).
Implications:

- Inspecting process state requires thread context, so signals can no longer
  be sent from a hardware interrupt handler. Signal activity must be
  deferred to a soft interrupt or kthread.

- As the proc state locking is simplified, it's now safe to take exit()
  and wait() out from under kernel_lock.

- The system spends less time at IPL_SCHED, and there is less lock activity.
 2008-04-24 15:35:27 +00:00
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c2deaa264e xc_broadcast: don't try to run cross calls on CPUs that are not yet running. 2008-04-24 13:56:30 +00:00
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026542bb25 Regen. 2008-04-24 11:51:47 +00:00
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30abe39468 - Retire SYCALL_MPSAFE. With the exceptions of darwin and irix emulations, 
all system calls are now MPSAFE.
- Remove unneeded acquire/release of kernel_lock.
 2008-04-24 11:51:18 +00:00
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15e29e981b Merge the socket locking patch: 
- Socket layer becomes MP safe.
- Unix protocols become MP safe.
- Allows protocol processing interrupts to safely block on locks.
- Fixes a number of race conditions.

With much feedback from matt@ and plunky@.
 2008-04-24 11:38:36 +00:00
sborrill
cbfd0202cd It's only a typo in a comment, but it reduces the number of diffs in my local 
tree :-)
 2008-04-24 08:51:06 +00:00
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c8ff5c0c50 kmutex_t * -> void *, to avoid MD header fallout. 2008-04-23 13:19:44 +00:00
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ebca8ee832 mutex_owned, rw_read_held, rw_write_held, rw_lock_held: check for a NULL 
pointer.
 2008-04-22 14:46:35 +00:00
njoly
8668268571 Fix semaphore permissions returned by semctl+IPC_STAT, by masking 
anything else that the expected lower 9 bits.
 2008-04-22 12:14:12 +00:00
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43d8bae932 Give callout_halt() an additional 'kmutex_t *interlock' argument. If there 
is a need to block and wait for the callout to complete, and there is an
interlock, it will be dropped while waiting and reacquired before return.
 2008-04-22 12:04:22 +00:00
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ecebc8b473 Implement MP callouts as discussed on tech-kern. The CPU binding code is 
disabled for the moment until we figure out what we want to do with CPUs
being offlined.
 2008-04-22 11:45:28 +00:00
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3fbed79bb8 Mark the callout MPSAFE and use callout_halt(). 2008-04-22 11:44:24 +00:00
reinoud
0971ac9234 When using nested buffers, allow one erroring-out nested buffer to 
error-out the master buffer.

The old setup was undeterministic since a later sheduled nested buffer
could clear the error again since there is no B_ERROR flag anymore. It also
would discard the error the nested buffer returned.
 2008-04-22 11:05:06 +00:00
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6bd54792e3 Regen. 2008-04-21 12:57:00 +00:00
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a2249ef75c Make ntp, pmc, reboot, sysarch, time syscalls MPSAFE. 2008-04-21 12:56:30 +00:00
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4d9ff4744f Fix TIOCSIG handling for SIGINFO. 2008-04-21 12:49:20 +00:00
yamt
a2c6efe92f ttygetinfo: fix a locking error in rev.1.215. 2008-04-21 11:56:01 +00:00
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d9bace2a92 Acquire kernel_lock directly in LFS syscalls. 2008-04-21 11:45:34 +00:00
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e655812d5c Regen. 2008-04-21 00:14:22 +00:00
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08b44dd8b9 timer fixes for PR 37093: 
- Fix serious concurrency problems, making the code MT and MP safe in
  the process.
- Don't allocate memory or inspect process state from hardclock().
 2008-04-21 00:13:46 +00:00
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573e08da0c ttys are allocated/freed infrequently enough that there is no point having 
a seperate pool for them.
 2008-04-20 19:30:13 +00:00
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664f91e474 Improve ^T / SIGINFO handling: 
- Restore code removed during LWPification.
- Don't touch proc state from a hardware interrupt handler.
- Fix the locking.
 2008-04-20 19:22:44 +00:00
mlelstv
77f5b73003 When unp_internalize fails (due to the sanity check or an out-of-memory 
condition), it leaves the control message with file descriptors. Calling
unp_dispose() will interpret the message as containing file pointers
and crash the system.
This change removes unp_dispose() from this failure path and avoids
using goto to jump into switch statements...
The previous workaround to ignore such messages in unp_scan() is removed.
 2008-04-20 07:47:18 +00:00
mjf
ede732e020 If cm->cmsg_len is not valid for unp_internalize do not use it to work out 
where the data is in unp_scan.

Fixes PR/38391
 2008-04-19 22:26:52 +00:00
plunky
7c3f385475 correct cut and paste error in uuid_dec_be(); le16dec -> be16dec 2008-04-19 18:21:38 +00:00
yamt
d8d1533c48 pidtbl_dump: use queue.h macros. no functional change. 2008-04-17 14:16:22 +00:00
yamt
91c77f1c78 enterpgrp: update a comment. 2008-04-17 14:14:20 +00:00
yamt
69bbf68c6e acquire proclist_lock for SESSHOLD/SESSRELE. 2008-04-17 14:07:31 +00:00
yamt
bc397338d9 sched_tick: don't expire timeslices for SCHED_FIFO lwps. 2008-04-17 14:03:42 +00:00
yamt
70f8f58cac s/selwakeup/selnotify/ in a comment. 2008-04-17 14:02:24 +00:00
rmind
5c0e3318e2 Adjust comments: spc_mutex is now always a per-CPU lock, L_INMEM -> LW_INMEM, 
L_WSUSPEND -> LW_WSUSPEND, and remove white-spaces, while here.
 2008-04-15 18:54:30 +00:00
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db0173b9a6 SSP: block interrupts when enabling, and move the init to just before 
starting secondary processors.
 2008-04-14 18:07:51 +00:00
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acc82f8808 soreceive: dom_externalize/dom_dispose can block. If new messages are 
appended while the receiver is blocked, the sockbuf will be corrupted.
Dequeue control messages from the sockbuf and sync its state in one
pass. Only then process the control messages. From FreeBSD.
 2008-04-14 15:42:20 +00:00
yamt
7bf20daff6 remove unnecessary __MUTEX_PRIVATE. 2008-04-14 09:40:43 +00:00
yamt
e5c1081112 make decay_cpu static. 2008-04-14 09:39:31 +00:00
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fa71518fbc Fix comments. 2008-04-14 00:18:43 +00:00
yamt
7ab55e0ff2 sched_print_runqueue: add __printf__ attribute to the 'pr' argument. 2008-04-13 22:54:19 +00:00
yamt
3cd40e9f41 sched_print_runqueue: fix printf formats. 2008-04-13 22:53:31 +00:00
dogcow
7bcb554c5f Since nobody else has fixed it yet: fix case of GDB && !MULTIPROCESSOR. 2008-04-13 16:22:14 +00:00
rmind
8d700f664c Fix shared memory code that it could handle > 4GB addresses correctly. 
PR/38109, patch (a little bit modified) from Chris Brand.
 2008-04-12 20:49:22 +00:00
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d87d01d660 Fix typo. Spotted by kardel@. 2008-04-12 18:22:03 +00:00
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a78ad62cfb cache_enter: inline LIST_INSERT_HEAD so that the membar_producer() can be 
put in the right spot. The 'next' link in the new entry must become globally
visible before the list head is updated. This could have affected systems
with weak memory ordering like the alpha.
 2008-04-12 17:34:26 +00:00
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da60beabf5 softint_overlay: bind the stolen LWP to the current CPU while processing, 
to prevent it blocking and migrating to another CPU.
 2008-04-12 17:17:28 +00:00