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5db078a9be
freebsd/sys/kern
History
John Baldwin 5db078a9be Fix mtx_legal2block. The only time that it is bad to block on a mutex is 
if we hold a spin mutex, since we can trivially get into deadlocks if we
start switching out of processes that hold spinlocks.  Checking to see if
interrupts were disabled was a sort of cheap way of doing this since most
of the time interrupts were only disabled when holding a spin lock.  At
least on the i386.  To fix this properly, use a per-process counter
p_spinlocks that counts the number of spin locks currently held, and
instead of checking to see if interrupts are disabled in the witness code,
check to see if we hold any spin locks.  Since child processes always
start up with the sched lock magically held in fork_exit(), we initialize
p_spinlocks to 1 for child processes.  Note that proc0 doesn't go through
fork_exit(), so it starts with no spin locks held.

Consulting from:	cp
2001-03-09 07:24:17 +00:00
..
bus_if.m Alter the return value and arguments of the GET_RESOURCE_LIST bus method. 2000-11-28 06:49:15 +00:00
device_if.m
genassym.sh Improve kernel bootstrapping: 2001-01-28 06:39:56 +00:00
gensetdefs.pl Don't hard-code alignment and data declarations valid for 64-bit 2001-01-29 01:55:54 +00:00
imgact_aout.c Back out proc locking to protect p_ucred for obtaining additional 2001-01-27 00:01:31 +00:00
imgact_elf.c Do not set a default ELF syscall ABI fallback. 2001-03-04 11:58:50 +00:00
imgact_gzip.c Fix a typo. 2001-01-24 08:42:39 +00:00
imgact_shell.c
inflate.c
init_main.c Do not set a default ELF syscall ABI fallback. 2001-03-04 11:58:50 +00:00
init_sysent.c Regen. 2000-12-02 05:45:32 +00:00
kern_acct.c Change and clean the mutex lock interface. 2001-02-09 06:11:45 +00:00
kern_acl.c o Introduce filesystem-independent POSIX.1e ACL utility routines to 2001-03-06 17:28:24 +00:00
kern_cap.c Remove unneeded #include <sys/proc.h> lines. 2000-10-29 13:57:19 +00:00
kern_clock.c Changed the aston() family to operate on a specified process instead of 2001-02-19 04:15:59 +00:00
kern_condvar.c Use the proc lock to protect access to p_sigacts->ps_sigintr. 2001-03-07 03:26:39 +00:00
kern_conf.c Fixes to track snapshot copy-on-write checking in the specinfo 2001-03-07 07:09:55 +00:00
kern_descrip.c Extend kqueue down to the device layer. 2001-02-15 16:34:11 +00:00
kern_environment.c
kern_event.c Add an EV_SET() convenience macro for initializing struct kevent prior 2001-02-24 01:44:03 +00:00
kern_exec.c Proc locking. 2001-03-07 03:27:32 +00:00
kern_exit.c - Call proc_reparent() when handing a process off to init in exit rather 2001-03-07 02:22:31 +00:00
kern_fork.c Fix mtx_legal2block. The only time that it is bad to block on a mutex is 2001-03-09 07:24:17 +00:00
kern_idle.c Implement a unified run queue and adjust priority levels accordingly. 2001-02-12 00:20:08 +00:00
kern_intr.c Ok, the kernel will panic in kmem_malloc() if the kernel map is full, so 2001-03-02 06:07:38 +00:00
kern_jail.c o Move per-process jail pointer (p->pr_prison) to inside of the subject 2001-02-21 06:39:57 +00:00
kern_kthread.c - Use _PHOLD and move it before a PROC_UNLOCK to reduce the number of 2001-03-07 02:36:47 +00:00
kern_ktr.c - In the KTR_EXTEND case, use a const char * to point to the passed in 2001-02-20 10:39:55 +00:00
kern_ktrace.c o Move per-process jail pointer (p->pr_prison) to inside of the subject 2001-02-21 06:39:57 +00:00
kern_linker.c Another round of the <sys/queue.h> FOREACH transmogriffer. 2001-02-04 16:08:18 +00:00
kern_lock.c Proc locking. 2001-02-09 16:27:41 +00:00
kern_lockf.c
kern_malloc.c Change and clean the mutex lock interface. 2001-02-09 06:11:45 +00:00
kern_mib.c o Move per-process jail pointer (p->pr_prison) to inside of the subject 2001-02-21 06:39:57 +00:00
kern_module.c Mechanical change to use <sys/queue.h> macro API instead of 2001-02-04 13:13:25 +00:00
kern_mutex.c Fix mtx_legal2block. The only time that it is bad to block on a mutex is 2001-03-09 07:24:17 +00:00
kern_ntptime.c
kern_physio.c
kern_proc.c Bitch more loudly when someone botches changes to kinfo_proc 2001-03-07 06:52:12 +00:00
kern_prot.c o Move per-process jail pointer (p->pr_prison) to inside of the subject 2001-02-21 06:39:57 +00:00
kern_random.c This patchset fixes a large number of file descriptor race conditions. 2000-11-18 21:01:04 +00:00
kern_resource.c Backout previous commit. sched_lock is held, thus interrupts are prevented 2001-02-22 20:12:52 +00:00
kern_shutdown.c Lock initproc when we send SIGINT to init during shutdown. 2001-03-07 02:50:09 +00:00
kern_sig.c - Proc locking. Most of signal handling is now MP safe and doesn't require 2001-03-07 02:59:54 +00:00
kern_subr.c Introduce copyinfrom and copyinstrfrom, which can copy data from either 2001-02-16 14:31:49 +00:00
kern_switch.c Add a new informative KASSERT to ensure that a process is in the SRUN state 2001-03-09 03:59:50 +00:00
kern_sx.c In order to avoid recursing on the backing mutex for sx locks in the 2001-03-06 23:13:15 +00:00
kern_synch.c - Proc locking. 2001-03-07 03:01:53 +00:00
kern_syscalls.c sysvipc loadable. 2000-12-01 08:57:47 +00:00
kern_sysctl.c Make the SYSCTL_OUT handlers sysctl_old_user() and sysctl_old_kernel() 2001-03-08 01:20:43 +00:00
kern_tc.c Remove a bogus #ifdef KTR stanza. 2001-01-01 23:09:53 +00:00
kern_time.c Lock the process while sending it SIGARLM and updating p_realtimer. 2001-03-07 03:02:56 +00:00
kern_timeout.c Change and clean the mutex lock interface. 2001-02-09 06:11:45 +00:00
kern_xxx.c
ksched.c Lock need_resched with sched_lock. 2001-02-22 13:46:09 +00:00
link_aout.c Manually add an extra _ to _DYNAMIC since it is provided by ld, not gcc. 2001-02-25 07:25:05 +00:00
link_elf_obj.c Make this compile in a.out mode. link.h has extra dependencies for a.out. 2001-02-25 07:26:54 +00:00
link_elf.c Make this compile in a.out mode. link.h has extra dependencies for a.out. 2001-02-25 07:26:54 +00:00
linker_if.m
Make.tags.inc there is no more miscfs/devfs 2000-12-31 23:12:20 +00:00
makedevops.pl Fix a bug in both scripts: HEADER sections were not emitted to the header 2001-01-04 13:41:24 +00:00
Makefile Retire kernfs (kernel part). 2000-12-28 12:17:35 +00:00
makeobjops.pl Fix a bug in both scripts: HEADER sections were not emitted to the header 2001-01-04 13:41:24 +00:00
makesyscalls.sh Add reserved lkmressys keyword. I swear, this script will die the 2000-12-01 08:47:54 +00:00
md5c.c Add ia64 support. 2000-09-29 13:36:47 +00:00
p1003_1b.c
posix4_mib.c
subr_acl_posix1e.c o Introduce filesystem-independent POSIX.1e ACL utility routines to 2001-03-06 17:28:24 +00:00
subr_autoconf.c
subr_blist.c Convert more malloc+bzero to malloc+M_ZERO. 2000-12-08 21:51:06 +00:00
subr_bus.c Unset the devclass if the attach fails and the devclass was not set to 2001-01-08 22:16:26 +00:00
subr_clist.c Fix typo: seperate -> separate. 2001-02-06 11:21:58 +00:00
subr_devstat.c Another round of the <sys/queue.h> FOREACH transmogriffer. 2001-02-04 16:08:18 +00:00
subr_disk.c Don't clone impossible unit numbers for disks. 2000-12-15 17:55:24 +00:00
subr_disklabel.c A bit of sanity-checking in bioqdisksort(): panic if we recurse. 2001-01-14 18:48:42 +00:00
subr_diskmbr.c Make diskerr() always log with printf. 2000-11-26 19:29:15 +00:00
subr_diskslice.c Add a new ioctl for doing virgin disklabels. 2000-10-31 07:05:40 +00:00
subr_eventhandler.c Change and clean the mutex lock interface. 2001-02-09 06:11:45 +00:00
subr_kobj.c Convert more malloc+bzero to malloc+M_ZERO. 2000-12-08 21:51:06 +00:00
subr_log.c Replace logwakeup() with "int msgbuftrigger". There is little 2000-12-20 21:50:37 +00:00
subr_mchain.c Remove superfluous m_pkthdr.rcv_if = NULL assignment following 2001-02-25 06:33:50 +00:00
subr_module.c Preceed/preceeding are not english words. Use precede and preceding. 2001-02-18 10:43:53 +00:00
subr_param.c Remove unneeded <stddef.h> #includes. 2000-10-29 16:57:42 +00:00
subr_prf.c Use PCPU_GET, PCPU_PTR and PCPU_SET to access all per-cpu variables 2001-01-10 04:43:51 +00:00
subr_prof.c Since the PC is a pointer to a code address, change the second parameter of 2001-02-22 18:07:31 +00:00
subr_rman.c Change and clean the mutex lock interface. 2001-02-09 06:11:45 +00:00
subr_sbuf.c Make the KASSERTs report the correct function names. 2001-03-06 17:48:26 +00:00
subr_scanf.c
subr_smp.c Activate USER_LDT by default. The new thread libraries are going to 2001-02-23 01:25:02 +00:00
subr_taskqueue.c - Catch up to the new swi API changes: 2001-02-09 17:46:35 +00:00
subr_trap.c - Release Giant a bit earlier on syscall exit. 2001-03-07 03:53:39 +00:00
subr_turnstile.c Fix mtx_legal2block. The only time that it is bad to block on a mutex is 2001-03-09 07:24:17 +00:00
subr_witness.c Fix mtx_legal2block. The only time that it is bad to block on a mutex is 2001-03-09 07:24:17 +00:00
subr_xxx.c Extend kqueue down to the device layer. 2001-02-15 16:34:11 +00:00
sys_generic.c Grab the process lock while calling psignal and before calling psignal. 2001-03-07 03:37:06 +00:00
sys_pipe.c Extend kqueue down to the device layer. 2001-02-15 16:34:11 +00:00
sys_process.c - Proc locking. 2001-03-07 03:06:18 +00:00
sys_socket.c Extend kqueue down to the device layer. 2001-02-15 16:34:11 +00:00
syscalls.c Regen. 2000-12-02 05:45:32 +00:00
syscalls.master Remove thr_sleep and thr_wakeup. Remove fields p_nthread and p_wakeup 2000-12-02 05:41:30 +00:00
sysv_ipc.c sysvipc loadable. 2000-12-01 08:57:47 +00:00
sysv_msg.c o Move per-process jail pointer (p->pr_prison) to inside of the subject 2001-02-21 06:39:57 +00:00
sysv_sem.c o Move per-process jail pointer (p->pr_prison) to inside of the subject 2001-02-21 06:39:57 +00:00
sysv_shm.c o Move per-process jail pointer (p->pr_prison) to inside of the subject 2001-02-21 06:39:57 +00:00
tty_compat.c
tty_conf.c
tty_cons.c Extend kqueue down to the device layer. 2001-02-15 16:34:11 +00:00
tty_pty.c o Move per-process jail pointer (p->pr_prison) to inside of the subject 2001-02-21 06:39:57 +00:00
tty_snoop.c Remove unused #include "snp.h" 2001-01-29 10:06:22 +00:00
tty_subr.c Fix typo: seperate -> separate. 2001-02-06 11:21:58 +00:00
tty_tty.c
tty.c Grab the process lock while calling psignal and before calling psignal. 2001-03-07 03:37:06 +00:00
uipc_accf.c Remove unneeded #include <sys/proc.h> lines. 2000-10-29 13:57:19 +00:00
uipc_domain.c Use callout_reset instead of timeout(9). Most callouts are statically 2000-11-27 22:52:31 +00:00
uipc_mbuf2.c Long awaited style fixup in mbuf code. Get rid of K&R style prototyping 2001-02-11 05:02:06 +00:00
uipc_mbuf.c Fix parameter order in the calls to MGET(). 2001-02-21 09:24:13 +00:00
uipc_proto.c
uipc_sockbuf.c Make sbcompress use the new M_WRITABLE macro. Previously sbcompress 2000-11-19 22:22:47 +00:00
uipc_socket2.c Make sbcompress use the new M_WRITABLE macro. Previously sbcompress 2000-11-19 22:22:47 +00:00
uipc_socket.c In soshutdown(), use SHUT_{RD,WR,RDWR} instead of FREAD and FWRITE. 2001-02-27 13:48:07 +00:00
uipc_syscalls.c Fix is a similar race condition as existed in the mbuf code. When we go 2001-03-08 19:21:45 +00:00
uipc_usrreq.c o Move per-process jail pointer (p->pr_prison) to inside of the subject 2001-02-21 06:39:57 +00:00
vfs_acl.c o Introduce filesystem-independent POSIX.1e ACL utility routines to 2001-03-06 17:28:24 +00:00
vfs_aio.c Use the kthread API to create and destroy AIO daemons. 2001-03-09 06:27:01 +00:00
vfs_bio.c Fix lockup for loopback NFS mounts. The pipelined I/O limitations could be 2001-02-28 04:13:11 +00:00
vfs_cache.c Staticize some malloc M_ instances. 2000-12-08 20:09:00 +00:00
vfs_cluster.c Fix lockup for loopback NFS mounts. The pipelined I/O limitations could be 2001-02-28 04:13:11 +00:00
vfs_conf.c Reviewed by: jlemon 2001-03-01 21:00:17 +00:00
vfs_default.c Added a dummy lookup vop. Specfs was broken by removing its dummy 2001-02-18 02:22:58 +00:00
vfs_export.c Add a NOTE_REVOKE flag for vnodes, which is triggered from within vclean(). 2001-02-23 20:06:01 +00:00
vfs_extattr.c Check to see if p_fd is NULL before derferencing it in checkdirs(). It's 2001-03-07 02:25:13 +00:00
vfs_init.c Another round of the <sys/queue.h> FOREACH transmogriffer. 2001-02-04 16:08:18 +00:00
vfs_lookup.c Untangle vfsinit() a bit. Use seperate sysinit functions rather than 2000-12-06 07:09:08 +00:00
vfs_mount.c Reviewed by: jlemon 2001-03-01 21:00:17 +00:00
vfs_subr.c Add a NOTE_REVOKE flag for vnodes, which is triggered from within vclean(). 2001-02-23 20:06:01 +00:00
vfs_syscalls.c Check to see if p_fd is NULL before derferencing it in checkdirs(). It's 2001-03-07 02:25:13 +00:00
vfs_vnops.c Extend kqueue down to the device layer. 2001-02-15 16:34:11 +00:00
vnode_if.pl Simplify this a bit so that it doesn't have to generate silly redundant 2000-12-06 06:59:38 +00:00
vnode_if.src Fixes to track snapshot copy-on-write checking in the specinfo 2001-03-07 07:09:55 +00:00