DragonFly commits List (threaded) for 2005-11
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cvs commit: src/bin/ps print.c ps.1 ps.c src/sys/dev/raid/vinum vinumdaemon.c src/sys/emulation/linux/i386 linux_ptrace.c src/sys/emulation/posix4 ksched.c src/sys/emulation/svr4 svr4_misc.c src/sys/i386/i386 db_trace.c pmap.c procfs_machdep.c ...
dillon 2005/11/14 10:50:18 PST
DragonFly src repository
Modified files:
bin/ps print.c ps.1 ps.c
sys/dev/raid/vinum vinumdaemon.c
sys/emulation/linux/i386 linux_ptrace.c
sys/emulation/posix4 ksched.c
sys/emulation/svr4 svr4_misc.c
sys/i386/i386 db_trace.c pmap.c procfs_machdep.c trap.c
sys/kern init_main.c kern_exit.c kern_fork.c
kern_proc.c kern_resource.c kern_sig.c
kern_synch.c lwkt_thread.c sys_generic.c
sys_process.c tty.c usched_bsd4.c
vfs_sync.c
sys/netproto/smb smb_subr.c
sys/sys kernel.h proc.h systm.h thread.h
sys/vfs/procfs procfs_ctl.c procfs_dbregs.c
procfs_fpregs.c procfs_regs.c
procfs_status.c
sys/vm pmap.h vm_fault.c vm_glue.c vm_meter.c
vm_pageout.c
usr.bin/systat pigs.c
usr.bin/top machine.c
Log:
Make tsleep/wakeup() MP SAFE for kernel threads and get us closer to
making it MP SAFE for user processes. Currently the code is operating
under the rule that access to a thread structure requires cpu locality of
reference, and access to a proc structure requires the Big Giant Lock. The
two are not mutually exclusive so, for example, tsleep/wakeup on a proc
needs both cpu locality of reference *AND* the BGL. This was true with the
old tsleep/wakeup and has now been documented.
The new tsleep/wakeup algorithm is quite simple in concept. Each cpu has its
own ident based hash table and each hash slot has a cpu mask which tells
wakeup() which cpu's might have the ident. A wakeup iterates through all
candidate cpus simply by chaining the IPI message through them until either
all candidate cpus have been serviced, or (with wakeup_one()) the requested
number of threads have been woken up.
Other changes made in this patch set:
* The sense of P_INMEM has been reversed. It is now P_SWAPPEDOUT. Also,
P_SWAPPING, P_SWAPINREQ are not longer relevant and have been removed.
* The swapping code has been cleaned up and seriously revamped. The new
swapin code staggers swapins to give the VM system a chance to respond
to new conditions. Also some lwp-related fixes were made (more
p_rtprio vs lwp_rtprio confusion).
* As mentioned above, tsleep/wakeup have been rewritten. The process
p_stat no longer does crazy transitions from SSLEEP to SSTOP. There is
now only SSLEEP and SSTOP is synthesized from P_SWAPPEDOUT for userland
consumpion. Additionally, tsleep() with PCATCH will NO LONGER STOP THE
PROCESS IN THE TSLEEP CALL. Instead, the actual stop is deferred until
the process tries to return to userland. This removes all remaining cases
where a stopped process can hold a locked kernel resource.
* A P_BREAKTSLEEP flag has been added. This flag indicates when an event
occurs that is allowed to break a tsleep with PCATCH. All the weird
undocumented setrunnable() rules have been removed and replaced with a
very simple algorithm based on this flag.
* Since the UAREA is no longer swapped, we no longer faultin() on PHOLD().
This also incidently fixes the 'ps' command's tendancy to try to swap
all processes back into memory.
* speedup_syncer() no longer does hackish checks on proc0's tsleep channel
(td_wchan).
* Userland scheduler acquisition and release has now been tightened up and
KKASSERT's have been added (one of the bugs Stefan found was related
to an improper lwkt_schedule() that was found by one of the new assertions).
We also have added other assertions related to expected conditions.
* A serious race in pmap_release_free_page() has been corrected. We
no longer couple the object generation check with a failed
pmap_release_free_page() call. Instead the two conditions are checked
independantly. We no longer loop when pmap_release_free_page() succeeds
(it is unclear how that could ever have worked properly).
Major testing by: Stefan Krueger <skrueger@xxxxxxxxxxxxxxxx>
Revision Changes Path
1.24 +3 -3 src/bin/ps/print.c
1.7 +1 -1 src/bin/ps/ps.1
1.18 +3 -2 src/bin/ps/ps.c
1.6 +1 -1 src/sys/dev/raid/vinum/vinumdaemon.c
1.9 +2 -2 src/sys/emulation/linux/i386/linux_ptrace.c
1.6 +4 -4 src/sys/emulation/posix4/ksched.c
1.30 +1 -1 src/sys/emulation/svr4/svr4_misc.c
1.11 +1 -1 src/sys/i386/i386/db_trace.c
1.53 +15 -73 src/sys/i386/i386/pmap.c
1.5 +7 -7 src/sys/i386/i386/procfs_machdep.c
1.66 +32 -11 src/sys/i386/i386/trap.c
1.51 +2 -2 src/sys/kern/init_main.c
1.48 +1 -1 src/sys/kern/kern_exit.c
1.44 +1 -1 src/sys/kern/kern_fork.c
1.21 +10 -8 src/sys/kern/kern_proc.c
1.24 +2 -2 src/sys/kern/kern_resource.c
1.39 +137 -116 src/sys/kern/kern_sig.c
1.53 +218 -212 src/sys/kern/kern_synch.c
1.86 +13 -26 src/sys/kern/lwkt_thread.c
1.23 +9 -4 src/sys/kern/sys_generic.c
1.18 +9 -3 src/sys/kern/sys_process.c
1.19 +1 -1 src/sys/kern/tty.c
1.4 +28 -17 src/sys/kern/usched_bsd4.c
1.8 +6 -7 src/sys/kern/vfs_sync.c
1.16 +1 -1 src/sys/netproto/smb/smb_subr.c
1.18 +1 -0 src/sys/sys/kernel.h
1.72 +15 -14 src/sys/sys/proc.h
1.33 +1 -0 src/sys/sys/systm.h
1.73 +7 -0 src/sys/sys/thread.h
1.8 +13 -4 src/sys/vfs/procfs/procfs_ctl.c
1.7 +1 -1 src/sys/vfs/procfs/procfs_dbregs.c
1.7 +1 -1 src/sys/vfs/procfs/procfs_fpregs.c
1.8 +1 -1 src/sys/vfs/procfs/procfs_regs.c
1.11 +5 -4 src/sys/vfs/procfs/procfs_status.c
1.16 +0 -2 src/sys/vm/pmap.h
1.20 +2 -1 src/sys/vm/vm_fault.c
1.36 +96 -81 src/sys/vm/vm_glue.c
1.8 +6 -6 src/sys/vm/vm_meter.c
1.16 +4 -4 src/sys/vm/vm_pageout.c
1.11 +1 -1 src/usr.bin/systat/pigs.c
1.18 +1 -1 src/usr.bin/top/machine.c
http://www.dragonflybsd.org/cvsweb/src/bin/ps/print.c.diff?r1=1.23&r2=1.24&f=u
http://www.dragonflybsd.org/cvsweb/src/bin/ps/ps.1.diff?r1=1.6&r2=1.7&f=u
http://www.dragonflybsd.org/cvsweb/src/bin/ps/ps.c.diff?r1=1.17&r2=1.18&f=u
http://www.dragonflybsd.org/cvsweb/src/sys/dev/raid/vinum/vinumdaemon.c.diff?r1=1.5&r2=1.6&f=u
http://www.dragonflybsd.org/cvsweb/src/sys/emulation/linux/i386/linux_ptrace.c.diff?r1=1.8&r2=1.9&f=u
http://www.dragonflybsd.org/cvsweb/src/sys/emulation/posix4/ksched.c.diff?r1=1.5&r2=1.6&f=u
http://www.dragonflybsd.org/cvsweb/src/sys/emulation/svr4/svr4_misc.c.diff?r1=1.29&r2=1.30&f=u
http://www.dragonflybsd.org/cvsweb/src/sys/i386/i386/db_trace.c.diff?r1=1.10&r2=1.11&f=u
http://www.dragonflybsd.org/cvsweb/src/sys/i386/i386/pmap.c.diff?r1=1.52&r2=1.53&f=u
http://www.dragonflybsd.org/cvsweb/src/sys/i386/i386/procfs_machdep.c.diff?r1=1.4&r2=1.5&f=u
http://www.dragonflybsd.org/cvsweb/src/sys/i386/i386/trap.c.diff?r1=1.65&r2=1.66&f=u
http://www.dragonflybsd.org/cvsweb/src/sys/kern/init_main.c.diff?r1=1.50&r2=1.51&f=u
http://www.dragonflybsd.org/cvsweb/src/sys/kern/kern_exit.c.diff?r1=1.47&r2=1.48&f=u
http://www.dragonflybsd.org/cvsweb/src/sys/kern/kern_fork.c.diff?r1=1.43&r2=1.44&f=u
http://www.dragonflybsd.org/cvsweb/src/sys/kern/kern_proc.c.diff?r1=1.20&r2=1.21&f=u
http://www.dragonflybsd.org/cvsweb/src/sys/kern/kern_resource.c.diff?r1=1.23&r2=1.24&f=u
http://www.dragonflybsd.org/cvsweb/src/sys/kern/kern_sig.c.diff?r1=1.38&r2=1.39&f=u
http://www.dragonflybsd.org/cvsweb/src/sys/kern/kern_synch.c.diff?r1=1.52&r2=1.53&f=u
http://www.dragonflybsd.org/cvsweb/src/sys/kern/lwkt_thread.c.diff?r1=1.85&r2=1.86&f=u
http://www.dragonflybsd.org/cvsweb/src/sys/kern/sys_generic.c.diff?r1=1.22&r2=1.23&f=u
http://www.dragonflybsd.org/cvsweb/src/sys/kern/sys_process.c.diff?r1=1.17&r2=1.18&f=u
http://www.dragonflybsd.org/cvsweb/src/sys/kern/tty.c.diff?r1=1.18&r2=1.19&f=u
http://www.dragonflybsd.org/cvsweb/src/sys/kern/usched_bsd4.c.diff?r1=1.3&r2=1.4&f=u
http://www.dragonflybsd.org/cvsweb/src/sys/kern/vfs_sync.c.diff?r1=1.7&r2=1.8&f=u
http://www.dragonflybsd.org/cvsweb/src/sys/netproto/smb/smb_subr.c.diff?r1=1.15&r2=1.16&f=u
http://www.dragonflybsd.org/cvsweb/src/sys/sys/kernel.h.diff?r1=1.17&r2=1.18&f=u
http://www.dragonflybsd.org/cvsweb/src/sys/sys/proc.h.diff?r1=1.71&r2=1.72&f=u
http://www.dragonflybsd.org/cvsweb/src/sys/sys/systm.h.diff?r1=1.32&r2=1.33&f=u
http://www.dragonflybsd.org/cvsweb/src/sys/sys/thread.h.diff?r1=1.72&r2=1.73&f=u
http://www.dragonflybsd.org/cvsweb/src/sys/vfs/procfs/procfs_ctl.c.diff?r1=1.7&r2=1.8&f=u
http://www.dragonflybsd.org/cvsweb/src/sys/vfs/procfs/procfs_dbregs.c.diff?r1=1.6&r2=1.7&f=u
http://www.dragonflybsd.org/cvsweb/src/sys/vfs/procfs/procfs_fpregs.c.diff?r1=1.6&r2=1.7&f=u
http://www.dragonflybsd.org/cvsweb/src/sys/vfs/procfs/procfs_regs.c.diff?r1=1.7&r2=1.8&f=u
http://www.dragonflybsd.org/cvsweb/src/sys/vfs/procfs/procfs_status.c.diff?r1=1.10&r2=1.11&f=u
http://www.dragonflybsd.org/cvsweb/src/sys/vm/pmap.h.diff?r1=1.15&r2=1.16&f=u
http://www.dragonflybsd.org/cvsweb/src/sys/vm/vm_fault.c.diff?r1=1.19&r2=1.20&f=u
http://www.dragonflybsd.org/cvsweb/src/sys/vm/vm_glue.c.diff?r1=1.35&r2=1.36&f=u
http://www.dragonflybsd.org/cvsweb/src/sys/vm/vm_meter.c.diff?r1=1.7&r2=1.8&f=u
http://www.dragonflybsd.org/cvsweb/src/sys/vm/vm_pageout.c.diff?r1=1.15&r2=1.16&f=u
http://www.dragonflybsd.org/cvsweb/src/usr.bin/systat/pigs.c.diff?r1=1.10&r2=1.11&f=u
http://www.dragonflybsd.org/cvsweb/src/usr.bin/top/machine.c.diff?r1=1.17&r2=1.18&f=u
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