Alexander Kabaev c8b876219f Upgrading a lock does not play well together with acquiring an exclusive lock ... and can lead to two threads being granted exclusive access. Check that no one has the same lock in exclusive mode before proceeding to acquire it. The LK_WANT_EXCL and LK_WANT_UPGRADE bits act as mini-locks and can block other threads. Normally this is not a problem since the mini locks are upgraded to full locks and the release of the locks will unblock the other threads. However if a thread reset the bits without obtaining a full lock other threads are not awoken. Add missing wakeups for these cases. PR: kern/69964 Submitted by: Stephan Uphoff <ups at tree dot com> Very good catch by: Stephan Uphoff <ups at tree dot com>		2004-08-16 15:01:22 +00:00
..
bus_if.m	Minor formatting fixes for lines > 80 characters	2004-08-12 17:26:22 +00:00
clock_if.m
device_if.m	Minor formatting fixes for lines > 80 characters	2004-08-12 17:26:22 +00:00
genassym.sh
imgact_aout.c	Change the types of vn_rdwr_inchunks()'s len and aresid arguments to	2004-06-05 02:18:28 +00:00
imgact_elf32.c
imgact_elf64.c
imgact_elf.c	Add __elfN(dump_thread). This function is called from __elfN(coredump)	2004-08-11 02:35:06 +00:00
imgact_gzip.c	Locking for the per-process resource limits structure.	2004-02-04 21:52:57 +00:00
imgact_shell.c
inflate.c
init_main.c	Add locking to the kqueue subsystem. This also makes the kqueue subsystem	2004-08-15 06:24:42 +00:00
init_sysent.c	Give kldunload a -f(orce) argument.	2004-07-13 19:36:59 +00:00
kern_acct.c	Second half of the dev_t cleanup.	2004-06-17 17:16:53 +00:00
kern_acl.c	Rename suser_cred()'s PRISON_ROOT flag to SUSER_ALLOWJAIL. This is	2004-07-26 07:24:04 +00:00
kern_alq.c
kern_clock.c	Update for the KDB framework:	2004-07-10 21:36:01 +00:00
kern_condvar.c	Synchronize the extra SA threading checks and return value handling of	2004-08-10 17:42:59 +00:00
kern_conf.c	Add locking to the kqueue subsystem. This also makes the kqueue subsystem	2004-08-15 06:24:42 +00:00
kern_context.c
kern_descrip.c	Add the missing knote_fdclose().	2004-08-16 03:09:01 +00:00
kern_environment.c	If the buffer supplied to kenv(KENV_DUMP, ...) isn't big enough,	2004-04-28 01:27:33 +00:00
kern_event.c	Allocate the marker, when scanning a kqueue, from the "heap" instead of the	2004-08-16 03:08:38 +00:00
kern_exec.c	Add locking to the kqueue subsystem. This also makes the kqueue subsystem	2004-08-15 06:24:42 +00:00
kern_exit.c	Add locking to the kqueue subsystem. This also makes the kqueue subsystem	2004-08-15 06:24:42 +00:00
kern_fork.c	Add locking to the kqueue subsystem. This also makes the kqueue subsystem	2004-08-15 06:24:42 +00:00
kern_idle.c	Expand the generic, but bogusly formed, copyright notice to include	2004-07-25 19:49:01 +00:00
kern_intr.c	In ithread_schedule(), when we plan to go harvest some entropy as	2004-08-06 03:39:28 +00:00
kern_jail.c	Add two missing includes and remove two uneeded.	2004-06-27 09:03:22 +00:00
kern_kse.c	Slight changes to comments and some whitespace changes.	2004-08-09 21:57:30 +00:00
kern_kthread.c
kern_ktr.c	Export KTR_COMPILE as a sysctl so you can easily check from user space	2004-07-23 17:41:44 +00:00
kern_ktrace.c	Rename suser_cred()'s PRISON_ROOT flag to SUSER_ALLOWJAIL. This is	2004-07-26 07:24:04 +00:00
kern_linker.c	Give kldunload a -f(orce) argument.	2004-07-13 19:36:59 +00:00
kern_lock.c	Upgrading a lock does not play well together with acquiring an exclusive lock	2004-08-16 15:01:22 +00:00
kern_lockf.c	Remove advertising clause from University of California Regent's license,	2004-04-05 21:03:37 +00:00
kern_mac.c	Do a pass over all modules in the kernel and make them return EOPNOTSUPP	2004-07-15 08:26:07 +00:00
kern_malloc.c	Reimplement contigmalloc(9) with an algorithm which stands a greatly-	2004-07-19 06:21:27 +00:00
kern_mbuf.c	* Add a "how" argument to uma_zone constructors and initialization functions	2004-08-02 00:18:36 +00:00
kern_mib.c	Remove advertising clause from University of California Regent's license,	2004-04-05 21:03:37 +00:00
kern_module.c	Do a pass over all modules in the kernel and make them return EOPNOTSUPP	2004-07-15 08:26:07 +00:00
kern_mtxpool.c
kern_mutex.c	Cache the value of curthread in the _get_sleep_lock() and _get_spin_lock()	2004-08-04 20:18:45 +00:00
kern_ntptime.c	Annual NTP kernel code spring-cleaning:	2004-03-14 15:23:05 +00:00
kern_physio.c	Eliminate the acquisition and release of Giant within physio(). Remove	2004-08-10 21:47:11 +00:00
kern_poll.c	Add a NULL param to an mi_switch() that I missed.	2004-07-03 02:38:03 +00:00
kern_proc.c	Cause pfind() not to return processes in the PRS_NEW state. As a result,	2004-08-14 17:15:16 +00:00
kern_prot.c	Rename suser_cred()'s PRISON_ROOT flag to SUSER_ALLOWJAIL. This is	2004-07-26 07:24:04 +00:00
kern_resource.c	Push UIDINFO_UNLOCK() slightly earlier in chgsbize(), as it's not	2004-08-06 22:04:33 +00:00
kern_sema.c	Change the return value of sema_timedwait() so it returns 0 on	2004-06-14 18:19:05 +00:00
kern_shutdown.c	Yet another tweak to the shutdown messages in boot():	2004-08-15 19:17:23 +00:00
kern_sig.c	Add locking to the kqueue subsystem. This also makes the kqueue subsystem	2004-08-15 06:24:42 +00:00
kern_subr.c	Clean up and wash struct iovec and struct uio handling.	2004-07-10 15:42:16 +00:00
kern_switch.c	Add a temporary debugging hack to detect a deadlock in setrunqueue(). This	2004-08-10 00:26:25 +00:00
kern_sx.c	Fix _sx_assert() to panic() rather than printf() when an assertion fails	2004-02-27 16:13:44 +00:00
kern_synch.c	Increase the amount of data exported by KTR in the KTR_RUNQ setting.	2004-08-09 18:21:12 +00:00
kern_syscalls.c	Do a pass over all modules in the kernel and make them return EOPNOTSUPP	2004-07-15 08:26:07 +00:00
kern_sysctl.c	Avoid casts as lvalues.	2004-07-28 06:42:41 +00:00
kern_tc.c	Add some KASSERTS.	2004-08-14 08:33:49 +00:00
kern_thr.c	When calling scheduler entrypoints for creating new threads and processes,	2004-07-18 23:36:13 +00:00
kern_thread.c	Whitespace nit.	2004-08-14 07:21:20 +00:00
kern_time.c	Update previous commit to:	2004-06-21 22:34:57 +00:00
kern_timeout.c	Cut a KTR record whenever a callout is invoked. Mark whether it runs	2004-08-06 21:49:00 +00:00
kern_umtx.c	writers must hold both sched_lock and the process lock; therefore, readers	2004-07-12 15:28:31 +00:00
kern_uuid.c	Fix generation of random multicast MAC address.	2004-01-22 13:34:11 +00:00
kern_xxx.c	Rename suser_cred()'s PRISON_ROOT flag to SUSER_ALLOWJAIL. This is	2004-07-26 07:24:04 +00:00
ksched.c
link_elf_obj.c	Give kldunload a -f(orce) argument.	2004-07-13 19:36:59 +00:00
link_elf.c	Normalize the VM wiring done with SPARSE_MAPPING: check for errors, and	2004-08-09 18:46:13 +00:00
linker_if.m
Make.tags.inc
Makefile
makesyscalls.sh
md4c.c
md5c.c
p1003_1b.c
posix4_mib.c
sched_4bsd.c	Properly keep track of how many kses are on the system run queue(s).	2004-08-11 20:54:48 +00:00
sched_ule.c	- Introduce a new flag KEF_HOLD that prevents sched_add() from doing a	2004-08-12 07:56:33 +00:00
subr_acl_posix1e.c	Rename suser_cred()'s PRISON_ROOT flag to SUSER_ALLOWJAIL. This is	2004-07-26 07:24:04 +00:00
subr_autoconf.c	Remove advertising clause from University of California Regent's license,	2004-04-05 21:03:37 +00:00
subr_blist.c	Move the definitions of SWAPBLK_NONE and SWAPBLK_MASK from vm_page.h to	2004-06-04 04:03:26 +00:00
subr_bus.c	Add doxygen doc comments for most of newbus and the BUS interface.	2004-07-18 16:30:31 +00:00
subr_clist.c	Preparation commit for the tty cleanups that will follow in the near	2004-07-15 20:47:41 +00:00
subr_clock.c	Remove advertising clause from University of California Regent's license,	2004-04-05 21:03:37 +00:00
subr_devstat.c	Do the dreaded s/dev_t/struct cdev */	2004-06-16 09:47:26 +00:00
subr_disk.c
subr_eventhandler.c
subr_hints.c
subr_kdb.c	Add a new sysctl, debug.kdb.stop_cpus, which controls whether or not we	2004-08-15 02:06:27 +00:00
subr_kobj.c
subr_log.c	Do the dreaded s/dev_t/struct cdev */	2004-06-16 09:47:26 +00:00
subr_mbpool.c
subr_mchain.c	Remove advertising clause from University of California Regent's license,	2004-04-05 21:03:37 +00:00
subr_module.c
subr_msgbuf.c
subr_param.c	Remove advertising clause from University of California Regent's license,	2004-04-05 21:03:37 +00:00
subr_pcpu.c
subr_power.c	Move the kernel power change printf under bootverbose since the	2004-01-02 18:24:13 +00:00
subr_prf.c	Update for the KDB framework:	2004-07-10 21:43:23 +00:00
subr_prof.c	- Move TDF_OWEPREEMPT, TDF_OWEUPC, and TDF_USTATCLOCK over to td_pflags	2004-07-16 21:04:55 +00:00
subr_rman.c	Fix the code in rman that merges adjacent unallocated resources to use a	2004-08-05 15:48:18 +00:00
subr_rtc.c	Remove advertising clause from University of California Regent's license,	2004-04-05 21:03:37 +00:00
subr_sbuf.c	Cosmetic adjustment to previous commit: name the second argument to	2004-07-09 11:37:44 +00:00
subr_scanf.c	Remove advertising clause from University of California Regent's license,	2004-04-05 21:03:37 +00:00
subr_sleepqueue.c	- Change mi_switch() and sched_switch() to accept an optional thread to	2004-07-02 19:09:50 +00:00
subr_smp.c	Don't keep evaluating our own cpu mask..	2004-08-13 00:57:43 +00:00
subr_taskqueue.c	rearange some code that handles the thread taskqueue so that it is more	2004-08-08 02:37:22 +00:00
subr_trap.c	Call thread_user_enter for M:N thread, ast() should be treated as another	2004-08-08 22:28:33 +00:00
subr_turnstile.c	Revert modification of subr_turnstile.c accidentally included in the	2004-07-25 23:32:32 +00:00
subr_witness.c	Remove a potential deadlock on i386 SMP by changing the lazypmap ipi and	2004-08-04 20:31:19 +00:00
sys_generic.c	Clean up and wash struct iovec and struct uio handling.	2004-07-10 15:42:16 +00:00
sys_pipe.c	Major enhancements to pipe memory usage:	2004-08-16 01:27:24 +00:00
sys_process.c	Add pl_flags to ptrace_lwpinfo, two flags PL_FLAG_SA and PL_FLAG_BOUND	2004-08-08 22:26:11 +00:00
sys_socket.c	Push Giant acquisition down into fo_stat() from most callers. Acquire	2004-07-22 20:40:23 +00:00
syscalls.c	Give kldunload a -f(orce) argument.	2004-07-13 19:36:59 +00:00
syscalls.master	Add kldunloadf() system call. Stay tuned for follwing commit messages.	2004-07-13 19:35:11 +00:00
sysv_ipc.c
sysv_msg.c	Add missing #include <sys/module.h>	2004-05-30 20:34:58 +00:00
sysv_sem.c	Add missing #include <sys/module.h>	2004-05-30 20:34:58 +00:00
sysv_shm.c	Avoid casts as lvalues.	2004-07-28 06:42:41 +00:00
tty_compat.c	Put the pre FreeBSD-2.x tty compat code under BURN_BRIDGES.	2004-06-21 22:57:16 +00:00
tty_conf.c	Preparation commit for the tty cleanups that will follow in the near	2004-07-15 20:47:41 +00:00
tty_cons.c	Add locking to the kqueue subsystem. This also makes the kqueue subsystem	2004-08-15 06:24:42 +00:00
tty_pty.c	Preparation commit for the tty cleanups that will follow in the near	2004-07-15 20:47:41 +00:00
tty_subr.c	Preparation commit for the tty cleanups that will follow in the near	2004-07-15 20:47:41 +00:00
tty_tty.c	Second half of the dev_t cleanup.	2004-06-17 17:16:53 +00:00
tty.c	Add locking to the kqueue subsystem. This also makes the kqueue subsystem	2004-08-15 06:24:42 +00:00
uipc_accf.c	Add a global mutex, accept_filter_mtx, to protect the global list of	2004-06-01 04:08:48 +00:00
uipc_cow.c	In some cases, sf_buf_alloc() should sleep with pri PCATCH; in others, it	2004-04-03 09:16:27 +00:00
uipc_domain.c	Remove advertising clause from University of California Regent's license,	2004-04-05 21:03:37 +00:00
uipc_jumbo.c	Use kmem_alloc_nofault() rather than kmem_alloc_pageable() for allocating	2004-07-23 19:36:18 +00:00
uipc_mbuf2.c	Make sure we don't call mbuf allocation functions with mutexes held.	2004-07-21 07:12:24 +00:00
uipc_mbuf.c	Back out just a portion of Alfred's last commit. Remove the MBUF_CHECK	2004-07-21 21:03:01 +00:00
uipc_proto.c	Remove advertising clause from University of California Regent's license,	2004-04-05 21:03:37 +00:00
uipc_sem.c	Add missing #include <sys/module.h>	2004-05-30 20:34:58 +00:00
uipc_sockbuf.c	Add locking to the kqueue subsystem. This also makes the kqueue subsystem	2004-08-15 06:24:42 +00:00
uipc_socket2.c	Add locking to the kqueue subsystem. This also makes the kqueue subsystem	2004-08-15 06:24:42 +00:00
uipc_socket.c	Add locking to the kqueue subsystem. This also makes the kqueue subsystem	2004-08-15 06:24:42 +00:00
uipc_syscalls.c	Add locking to the kqueue subsystem. This also makes the kqueue subsystem	2004-08-15 06:24:42 +00:00
uipc_usrreq.c	Always acquire the UNIX domain socket subsystem lock (UNP lock)	2004-08-16 04:41:03 +00:00
vfs_acl.c	Rename suser_cred()'s PRISON_ROOT flag to SUSER_ALLOWJAIL. This is	2004-07-26 07:24:04 +00:00
vfs_aio.c	Add locking to the kqueue subsystem. This also makes the kqueue subsystem	2004-08-15 06:24:42 +00:00
vfs_bio.c	Eliminate unused second argument to reassignbuf() and simplify it	2004-07-25 21:24:23 +00:00
vfs_cache.c	Remove advertising clause from University of California Regent's license,	2004-04-05 21:03:37 +00:00
vfs_cluster.c	Eliminate unused second argument to reassignbuf() and simplify it	2004-07-25 21:24:23 +00:00
vfs_default.c	Make VFS_ROOT() and vflush() take a thread argument.	2004-07-12 08:14:09 +00:00
vfs_export.c	Make VFS_ROOT() and vflush() take a thread argument.	2004-07-12 08:14:09 +00:00
vfs_extattr.c	Rename suser_cred()'s PRISON_ROOT flag to SUSER_ALLOWJAIL. This is	2004-07-26 07:24:04 +00:00
vfs_init.c	Put a version element in the VFS filesystem configuration structure	2004-07-30 22:08:52 +00:00
vfs_lookup.c	Assert Giant in namei(). Bugs have been reported in which, following	2004-08-04 18:39:07 +00:00
vfs_mount.c	Put a version element in the VFS filesystem configuration structure	2004-07-30 22:08:52 +00:00
vfs_subr.c	s/MAX_SAFE_MAXVNODES/MAXVNODES_MAX/g	2004-08-16 08:33:37 +00:00
vfs_syscalls.c	Rename suser_cred()'s PRISON_ROOT flag to SUSER_ALLOWJAIL. This is	2004-07-26 07:24:04 +00:00
vfs_vnops.c	Add locking to the kqueue subsystem. This also makes the kqueue subsystem	2004-08-15 06:24:42 +00:00
vnode_if.src	Remove advertising clause from University of California Regent's license,	2004-04-05 21:03:37 +00:00