src-test/sys/kern/subr_sleepqueue.c, branch stable/7

MFC: Close a race in sleepq_broadcast() where the sleepq could be reused

2008-09-16T20:01:57Z

after it had been assigned to the last sleeping thread. Approved by: re (kib)

MFC: Fix a spin lock LOR when waking up a thread from a process that is

2008-09-12T21:00:11Z

swapped out by deferring the wakeup of the swapper kernel process until after releasing sleepq chain locks. Approved by: re (kib)

MFC 1.48: Fix a sleepq race when checking signals.

2008-04-19T04:45:51Z

MFC: Mark sleepqueue chain spin mutexes as recursable.

2008-03-05T21:12:49Z

MFC 1.42,1.43: Fix races and other bugs with sleepq timeout handling.

2008-01-28T21:02:08Z

subr_sleepqueue.c presents a thread lock missing which leads to dangerous

2007-09-13T09:12:36Z

races for some struct thread members. More specifically, this bug seems responsible for some memory dumping problems people were experiencing. Fix this adding correct thread locking. Tested by: rwatson Submitted by: tegge Approved by: jeff Approved by: re

- Include opt_sched.h for SCHED_STATS.

2007-06-12T23:27:31Z

Commit 2/14 of sched_lock decomposition.

2007-06-04T23:50:56Z

- Adapt sleepqueues to the new thread_lock() mechanism. - Delay assigning the sleep queue spinlock as the thread lock until after we've checked for signals. It is illegal for a thread to return in mi_switch() with any lock assigned to td_lock other than the scheduler locks. - Change sleepq_catch_signals() to do the switch if necessary to simplify the callers. - Simplify timeout handling now that locking a sleeping thread has the side-effect of locking the sleepqueue. Some previous races are no longer possible. Tested by: kris, current@ Tested on: i386, amd64, ULE, 4BSD, libthr, libkse, PREEMPTION, etc. Discussed with: kris, attilio, kmacy, jhb, julian, bde (small parts each)

- Convert turnstiles and sleepqueus to use UMA. This provides a modest

2007-05-18T06:32:24Z

speedup and will be more useful after each gains a spinlock in the impending thread_lock() commit. - Move initialization and asserts into init/fini routines. fini routines are only needed in the INVARIANTS case for now. Submitted by: Attilio Rao Tested by: kris, jeff

Cleaner fix for handling declaration of loop variable under INVARIANTS

2006-12-17T00:14:20Z

- in trying to avoid nested brackets and #ifdef INVARIANTS around i at the top, I broke booting for INVARIANTS all together :-( - the cleanest fix is to simply assign to sq twice if INVARIANTS is enabled - tested both with and without INVARIANTS :-/