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431035cf16
freebsd-skq/sys/kern
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davide 431035cf16 - Make callout(9) tickless, relying on eventtimers(4) as backend for 
precise time event generation. This greatly improves granularity of
callouts which are not anymore constrained to wait next tick to be
scheduled.
- Extend the callout KPI introducing a set of callout_reset_sbt* functions,
which take a sbintime_t as timeout argument. The new KPI also offers a
way for consumers to specify precision tolerance they allow, so that
callout can coalesce events and reduce number of interrupts as well as
potentially avoid scheduling a SWI thread.
- Introduce support for dispatching callouts directly from hardware
interrupt context, specifying an additional flag. This feature should be
used carefully, as long as interrupt context has some limitations
(e.g. no sleeping locks can be held).
- Enhance mechanisms to gather informations about callwheel, introducing
a new sysctl to obtain stats.

This change breaks the KBI. struct callout fields has been changed, in
particular 'int ticks' (4 bytes) has been replaced with 'sbintime_t'
(8 bytes) and another 'sbintime_t' field was added for precision.

Together with:	mav
Reviewed by:	attilio, bde, luigi, phk
Sponsored by:	Google Summer of Code 2012, iXsystems inc.
Tested by:	flo (amd64, sparc64), marius (sparc64), ian (arm),
		markj (amd64), mav, Fabian Keil
2013-03-04 11:09:56 +00:00
..
bus_if.m Add a BUS_CHILD_DELETED() method that a bus can hook to allow it to cleanup 2012-08-21 18:13:09 +00:00
capabilities.conf - Implement two new system calls: 2013-03-02 21:11:30 +00:00
clock_if.m
cpufreq_if.m
device_if.m Revert r239178 and implement two new functions, namely 2012-08-15 15:42:57 +00:00
dtio_kdtrace.c Change the module name for the I/O provider to "kernel" from 2012-09-25 19:16:28 +00:00
genassym.sh
imgact_aout.c Cosmetics: define FREEBSD32_MINUSER and AOUT32_MINUSER for struct 2012-07-22 13:41:45 +00:00
imgact_elf32.c
imgact_elf64.c
imgact_elf.c Remove the ia64-specific code fragment, which effect is more cleanly 2013-02-10 20:08:33 +00:00
imgact_gzip.c Remove an old hack I noticed years ago, but never committed. 2012-06-28 07:33:43 +00:00
imgact_shell.c The execution of the shebang script requires putting interpreter path, 2011-03-06 22:59:30 +00:00
inflate.c
init_main.c print compiler version in the kernel banner 2013-02-02 11:58:35 +00:00
init_sysent.c Regen after r247667. 2013-03-02 21:12:54 +00:00
kern_acct.c Remove the support for using non-mpsafe filesystem modules. 2012-10-22 17:50:54 +00:00
kern_alq.c Remove the support for using non-mpsafe filesystem modules. 2012-10-22 17:50:54 +00:00
kern_clock.c - Make callout(9) tickless, relying on eventtimers(4) as backend for 2013-03-04 11:09:56 +00:00
kern_clocksource.c - Make callout(9) tickless, relying on eventtimers(4) as backend for 2013-03-04 11:09:56 +00:00
kern_condvar.c Remove all the checks on curthread != NULL with the exception of some MD 2012-09-13 22:26:22 +00:00
kern_conf.c Reject spaces and double quotation marks in device names. devctl(4) 2012-12-22 13:33:28 +00:00
kern_cons.c cngetc: use cpu_spinwait to ease the cncheckc loop a tiny bit 2012-10-06 19:50:23 +00:00
kern_context.c In order to maximize the re-usability of kernel code in user space this 2011-09-16 13:58:51 +00:00
kern_cpu.c Revert r175376 and tune cpufreq(4) frequency comparison logic instead. 2012-03-10 18:56:16 +00:00
kern_cpuset.c Post r222812 KTR_CPUMASK started being initialized only as a tunable 2012-08-30 21:22:47 +00:00
kern_ctf.c Remove the support for using non-mpsafe filesystem modules. 2012-10-22 17:50:54 +00:00
kern_descrip.c Use dedicated malloc type for filecaps-related data, so we can detect any 2013-03-03 23:25:45 +00:00
kern_dtrace.c Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs. 2011-11-07 06:44:47 +00:00
kern_environment.c Reserve room for the terminating NUL when setting or getting kernel 2012-08-14 19:16:30 +00:00
kern_et.c MFcalloutng: 2013-02-28 13:46:03 +00:00
kern_event.c Make the interval timings for EVFILT_TIMER more accurate. tvtohz() always 2012-07-13 13:24:33 +00:00
kern_exec.c Merge Capsicum overhaul: 2013-03-02 00:53:12 +00:00
kern_exit.c Merge Capsicum overhaul: 2013-03-02 00:53:12 +00:00
kern_fail.c Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs. 2011-11-07 06:44:47 +00:00
kern_ffclock.c Revise the sysctl handling code and restructure the hierarchy of sysctls 2011-12-01 07:19:13 +00:00
kern_fork.c Merge Capsicum overhaul: 2013-03-02 00:53:12 +00:00
kern_gzio.c Remove the support for using non-mpsafe filesystem modules. 2012-10-22 17:50:54 +00:00
kern_hhook.c Staticize malloc types. 2011-04-13 11:28:46 +00:00
kern_idle.c MFC 2011-05-31 21:22:44 +00:00
kern_intr.c If an interrupt event's assign_cpu method fails, then restore the original 2013-02-07 06:48:47 +00:00
kern_jail.c prison_racct_detach can be called for not fully initialized jail, so make it check that the jail has racct before doing anything 2012-12-18 18:34:36 +00:00
kern_khelp.c Use the full and proper company name for Swinburne University of Technology 2011-04-12 08:13:18 +00:00
kern_kthread.c Stop treating td_sigmask specially for the purposes of new thread 2012-05-26 20:03:47 +00:00
kern_ktr.c ktr: correctly handle possible wrap-around in the boot buffer 2013-02-08 07:29:07 +00:00
kern_ktrace.c Remove the support for using non-mpsafe filesystem modules. 2012-10-22 17:50:54 +00:00
kern_linker.c Remove the support for using non-mpsafe filesystem modules. 2012-10-22 17:50:54 +00:00
kern_lock.c lockmgr: unlock interlock (if requested) when dealing with upgrade/downgrade 2013-01-06 21:47:59 +00:00
kern_lockf.c Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs. 2011-11-07 06:44:47 +00:00
kern_lockstat.c
kern_loginclass.c In order to maximize the re-usability of kernel code in user space this 2011-09-16 13:58:51 +00:00
kern_malloc.c Try to improve r242655 take III: move these SYSCTLs describing the kernel 2013-02-04 09:35:48 +00:00
kern_mbuf.c Move the mbuf memory limit calculations from init_param2() to 2013-01-17 21:28:31 +00:00
kern_mib.c fix some fat-fingering in r246246 2013-02-02 14:19:50 +00:00
kern_module.c Fix a typo. 2012-08-22 20:01:57 +00:00
kern_mtxpool.c
kern_mutex.c Fixup r240424: On entering KDB backends, the hijacked thread to run 2012-12-22 09:37:34 +00:00
kern_ntptime.c Limit popcorn limit to something sane (either 2ns or 2 ticks if that's 2012-08-16 02:35:44 +00:00
kern_osd.c
kern_physio.c Account i/o done on cdevs. 2010-11-25 20:05:11 +00:00
kern_pmc.c Add software PMC support. 2012-03-28 20:58:30 +00:00
kern_poll.c Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
kern_priv.c - Add sysctl to allow unprivileged users to call mlock(2)-family system 2012-12-18 07:36:45 +00:00
kern_proc.c Look for zombie process only if we were given process id. 2012-11-25 19:31:42 +00:00
kern_prot.c Style fix 2012-11-14 10:33:12 +00:00
kern_racct.c Improve KASSERT messages in racct, to make it clear which resource 2012-11-15 15:55:49 +00:00
kern_rangelock.c Add a rangelock implementation, intended to be used to range-locking 2012-05-30 16:06:38 +00:00
kern_rctl.c Add CPU percentage limit enforcement to RCTL. The resouce name is "pcpu". 2012-10-26 16:01:08 +00:00
kern_resource.c Change kern.proc.rlimit sysctl to: 2012-01-22 20:25:00 +00:00
kern_rmlock.c Fixup r240424: On entering KDB backends, the hijacked thread to run 2012-12-22 09:37:34 +00:00
kern_rwlock.c Fixup r240424: On entering KDB backends, the hijacked thread to run 2012-12-22 09:37:34 +00:00
kern_sdt.c Instead of only iterating over the set of known SDT probes when sdt.ko is 2012-03-27 15:07:43 +00:00
kern_sema.c
kern_sharedpage.c Move the code dealing with shared page into a dedicated 2012-06-23 10:15:23 +00:00
kern_shutdown.c Switch the hardwired WITNESS panics to kassert_panic. 2012-12-11 01:23:50 +00:00
kern_sig.c Further refine the handling of stop signals in the NFS client. The 2013-02-21 19:02:50 +00:00
kern_switch.c Add a comment on why inlining critical_enter() may not be a good idea 2012-12-09 04:54:22 +00:00
kern_sx.c Fixup r240424: On entering KDB backends, the hijacked thread to run 2012-12-22 09:37:34 +00:00
kern_synch.c Fix some minor inaccuracies introduced in r243251. 2013-01-05 00:23:26 +00:00
kern_syscalls.c Call chainevh callback when we are invoked with neither MOD_LOAD nor 2010-10-21 20:31:50 +00:00
kern_sysctl.c - Use strdup(9) instead of reimplementing it. 2013-03-01 18:49:14 +00:00
kern_tc.c - Make callout(9) tickless, relying on eventtimers(4) as backend for 2013-03-04 11:09:56 +00:00
kern_thr.c Stop treating td_sigmask specially for the purposes of new thread 2012-05-26 20:03:47 +00:00
kern_thread.c Fix a few typos. 2013-02-19 16:35:27 +00:00
kern_time.c Fix a race between kern_setitimer() and realitexpire(), where the 2012-12-04 20:49:39 +00:00
kern_timeout.c - Make callout(9) tickless, relying on eventtimers(4) as backend for 2013-03-04 11:09:56 +00:00
kern_umtx.c The fields of struct timespec32 should be int32_t and not uint32_t. 2012-10-27 23:42:41 +00:00
kern_uuid.c Convert all users of IF_ADDR_LOCK to use new locking macros that specify 2012-01-05 19:00:36 +00:00
kern_xxx.c
ksched.c sched_rr_interval() seems always returned period in hz ticks, but same 2012-08-10 18:19:57 +00:00
link_elf_obj.c Remove the support for using non-mpsafe filesystem modules. 2012-10-22 17:50:54 +00:00
link_elf.c Remove the support for using non-mpsafe filesystem modules. 2012-10-22 17:50:54 +00:00
linker_if.m
Make.tags.inc Disconnect non-MPSAFE SMBFS from the build in preparation for dropping 2012-10-18 12:04:56 +00:00
Makefile Continue to introduce Capsicum Capability Mode support: 2011-03-01 13:28:27 +00:00
makesyscalls.sh - Add the ffclock_getcounter(), ffclock_getestimate() and ffclock_setestimate() 2011-11-21 01:26:10 +00:00
md4c.c
md5c.c
p1003_1b.c In order to maximize the re-usability of kernel code in user space this 2011-09-16 13:58:51 +00:00
posix4_mib.c Define two new sysctl node flags: CTLFLAG_CAPRD and CTLFLAG_CAPRW, which 2011-07-17 23:05:24 +00:00
sched_4bsd.c Add CPU percentage limit enforcement to RCTL. The resouce name is "pcpu". 2012-10-26 16:01:08 +00:00
sched_ule.c Fix bug in r242852 that prevented CPU from becoming idle if kernel built 2012-11-15 14:10:51 +00:00
serdev_if.m
stack_protector.c
subr_acl_nfs4.c Fix bug where NFSv4 ACL enforcement code wouldn't unconditionally 2012-04-17 14:54:00 +00:00
subr_acl_posix1e.c Add module load/unload stubs. 2012-03-13 20:27:48 +00:00
subr_autoconf.c Retire PCONFIG and leave the priority of thread0 alone when waiting for 2011-01-06 22:09:37 +00:00
subr_blist.c Remove reference to the rlist code from comments, and fix a typo visible 2013-02-05 20:08:33 +00:00
subr_bufring.c
subr_bus_dma.c Reform the busdma API so that new types may be added without modifying 2013-02-12 16:57:20 +00:00
subr_bus.c Fix a typo. 2013-01-23 14:37:05 +00:00
subr_busdma_bufalloc.c Create an architecture-agnostic buffer pool manager that uses uma(9) to 2012-12-20 00:34:54 +00:00
subr_clock.c Improve style and wording of comments and sysctl descriptions [1]. 2011-01-09 14:34:56 +00:00
subr_devstat.c Fix build for kernels with dtrace hooks. 2012-07-11 18:50:50 +00:00
subr_disk.c
subr_dummy_vdso_tc.c Implement mechanism to export some kernel timekeeping data to 2012-06-22 07:06:40 +00:00
subr_eventhandler.c
subr_fattime.c
subr_firmware.c Correct sizeof usage 2012-06-25 05:41:16 +00:00
subr_hash.c Convert panic()s to KASSERT()s. This is an optimisation for 2012-01-23 16:31:46 +00:00
subr_hints.c Style fixes. 2012-09-04 23:16:55 +00:00
subr_kdb.c - Extend the KDB interface to add a per-debugger callback to print a 2012-04-12 17:43:59 +00:00
subr_kobj.c As it turns out, r186347 actually is insufficient to avoid the use of the 2011-11-15 20:11:03 +00:00
subr_lock.c - Implement run-time expansion of the KTR buffer via sysctl. 2012-11-15 00:51:57 +00:00
subr_log.c Add kqueue support to /dev/klog. 2012-02-01 14:34:52 +00:00
subr_mbpool.c
subr_mchain.c Mechanically substitute flags from historic mbuf allocator with 2012-12-05 08:04:20 +00:00
subr_module.c Provide convenience function for obtaining MODINFO_ADDR and MODINFO_SIZE 2011-02-09 19:08:21 +00:00
subr_msgbuf.c - Clean up timestamps in msgbuf code. The timestamps should now be 2012-03-19 00:36:32 +00:00
subr_param.c - Make callout(9) tickless, relying on eventtimers(4) as backend for 2013-03-04 11:09:56 +00:00
subr_pcpu.c Mark MALLOC_DEFINEs static that have no corresponding MALLOC_DECLAREs. 2011-11-07 06:44:47 +00:00
subr_power.c
subr_prf.c Fix double vision syndrome (read: double output) when in the 2011-10-16 14:16:46 +00:00
subr_prof.c Mark all SYSCTL_NODEs static that have no corresponding SYSCTL_DECLs. 2011-11-07 15:43:11 +00:00
subr_rman.c Unlock in the error path to prevent a lock leak. 2012-05-31 17:27:05 +00:00
subr_rtc.c Core structure and functions to support a feed-forward clock within the kernel. 2011-11-19 14:10:16 +00:00
subr_sbuf.c r222015 introduced a new assertion that the size of a fixed-length sbuf 2011-08-19 08:29:10 +00:00
subr_scanf.c Xen netback driver rewrite. 2012-01-26 16:35:09 +00:00
subr_sglist.c
subr_sleepqueue.c Replace the TDP_NOSLEEPING flag with a counter so that the 2013-03-01 22:03:31 +00:00
subr_smp.c - Correctly handle EWOULDBLOCK in quiesce_cpus 2012-12-19 20:08:06 +00:00
subr_stack.c Constify stack argument for functions that don't modify it. 2011-11-16 19:06:55 +00:00
subr_syscall.c Fix build on ARM (and probably other platforms) 2012-12-28 06:52:53 +00:00
subr_taskqueue.c Add a special meaning to the negative ticks argument for 2012-11-20 15:33:48 +00:00
subr_trap.c Replace the TDP_NOSLEEPING flag with a counter so that the 2013-03-01 22:03:31 +00:00
subr_turnstile.c Update the comment: we do show the backtrace of misbehaving thread. 2013-02-17 21:37:32 +00:00
subr_uio.c Reform the busdma API so that new types may be added without modifying 2013-02-12 16:57:20 +00:00
subr_unit.c Correct double "the the" 2012-09-14 21:28:56 +00:00
subr_witness.c Cleanup more of the kassert_panic. 2012-12-11 07:08:14 +00:00
sys_capability.c Merge Capsicum overhaul: 2013-03-02 00:53:12 +00:00
sys_generic.c Merge Capsicum overhaul: 2013-03-02 00:53:12 +00:00
sys_pipe.c Remove redundant space. 2013-02-17 11:48:16 +00:00
sys_procdesc.c Add the wait6(2) system call. It takes POSIX waitid()-like process 2012-11-13 12:52:31 +00:00
sys_process.c Merge from vmobj-rwlock branch: 2013-02-26 01:00:11 +00:00
sys_socket.c Add the fo_chown and fo_chmod methods to struct fileops and use them 2011-08-16 20:07:47 +00:00
syscalls.c Regen after r247667. 2013-03-02 21:12:54 +00:00
syscalls.master - Implement two new system calls: 2013-03-02 21:11:30 +00:00
systrace_args.c Regen after r247667. 2013-03-02 21:12:54 +00:00
sysv_ipc.c
sysv_msg.c In order to maximize the re-usability of kernel code in user space this 2011-09-16 13:58:51 +00:00
sysv_sem.c In order to maximize the re-usability of kernel code in user space this 2011-09-16 13:58:51 +00:00
sysv_shm.c Close a race due to dropping of the map lock between creating a map entry 2012-02-19 00:28:49 +00:00
tty_compat.c
tty_info.c Fix whitespace inconsistencies in TTY code. 2012-02-06 18:15:46 +00:00
tty_inq.c Use strchr() and strrchr(). 2012-01-02 12:12:10 +00:00
tty_outq.c Fix whitespace inconsistencies in the TTY layer and its drivers owned by me. 2011-06-26 18:26:20 +00:00
tty_pts.c Fix possible fp reference leak in posix_openpt 2012-11-18 15:48:34 +00:00
tty_tty.c Finish r210923, 210926. Mark some devices as eternal. 2011-01-04 10:59:38 +00:00
tty_ttydisc.c Correct SIGTTIN handling. 2012-10-25 09:05:21 +00:00
tty.c Merge Capsicum overhaul: 2013-03-02 00:53:12 +00:00
uipc_accf.c
uipc_cow.c Add some FEATURE macros for various features (AUDIT/CAM/IPC/KTR/MAC/NFS/NTP/ 2011-02-25 10:11:01 +00:00
uipc_debug.c
uipc_domain.c - Implement two new system calls: 2013-03-02 21:11:30 +00:00
uipc_mbuf2.c Mechanically substitute flags from historic mbuf allocator with 2012-12-05 08:04:20 +00:00
uipc_mbuf.c - Move large functions m_getjcl() and m_get2() to kern/uipc_mbuf.c 2013-01-24 09:29:41 +00:00
uipc_mqueue.c Merge Capsicum overhaul: 2013-03-02 00:53:12 +00:00
uipc_sem.c Merge Capsicum overhaul: 2013-03-02 00:53:12 +00:00
uipc_shm.c Merge Capsicum overhaul: 2013-03-02 00:53:12 +00:00
uipc_sockbuf.c Mechanically substitute flags from historic mbuf allocator with 2012-12-05 08:04:20 +00:00
uipc_socket.c - Implement two new system calls: 2013-03-02 21:11:30 +00:00
uipc_syscalls.c - Implement two new system calls: 2013-03-02 21:11:30 +00:00
uipc_usrreq.c For some reason when I started to pass filedescent structures instead of 2013-03-03 23:39:30 +00:00
vfs_acl.c Prezero the acl structure which is to be copied to usermode, to avoid 2013-02-06 15:18:46 +00:00
vfs_aio.c Merge Capsicum overhaul: 2013-03-02 00:53:12 +00:00
vfs_bio.c Make recursive getblk() slightly more useful. Keep the buffer state 2013-02-27 07:34:09 +00:00
vfs_cache.c Remove the support for using non-mpsafe filesystem modules. 2012-10-22 17:50:54 +00:00
vfs_cluster.c Add barrier write capability to the VFS buffer interface. A barrier 2013-02-16 14:51:30 +00:00
vfs_default.c Make the default implementation of the VOP_VPTOCNP() fail if the 2013-03-01 18:40:14 +00:00
vfs_export.c Further refine the handling of stop signals in the NFS client. The 2013-02-21 19:02:50 +00:00
vfs_extattr.c Remove the support for using non-mpsafe filesystem modules. 2012-10-22 17:50:54 +00:00
vfs_hash.c Add exported vfs_hash_index() function, which calculates the canonical 2013-01-14 05:41:40 +00:00
vfs_init.c Don't worry if a module is already loaded when looking for a fstype to mount 2013-02-21 02:41:37 +00:00
vfs_lookup.c Merge Capsicum overhaul: 2013-03-02 00:53:12 +00:00
vfs_mount.c Revert revision 244760 because strncpy pads trailing space with zero, 2013-01-04 11:11:12 +00:00
vfs_mountroot.c Do not allocate buffer of the 255 bytes length on the stack. 2012-12-04 20:49:04 +00:00
vfs_subr.c Add a trivial comment to record the proper commit log for r245407: 2013-01-14 05:52:23 +00:00
vfs_syscalls.c If the target file already exists, check for the CAP_UNLINKAT capabiity right 2013-03-02 09:58:47 +00:00
vfs_vnops.c Remove unnecessary variables. 2013-03-01 21:58:56 +00:00
vnode_if.src remove vop_lookup_pre and vop_lookup_post 2012-11-22 10:36:10 +00:00