zrj [Wed, 2 May 2018 13:42:24 +0000 (16:42 +0300)]
gcc80: Hook into the buildworld as optional compiler.
This alternative compiler can be activated by WORLD_ALTCOMPILER variable.
It will not be built by default.
zrj [Wed, 2 May 2018 13:40:58 +0000 (16:40 +0300)]
gcc80: Add pregenerated manpages.
zrj [Wed, 2 May 2018 13:36:10 +0000 (16:36 +0300)]
gcc80: Add pregenerated headers.
zrj [Wed, 2 May 2018 13:35:59 +0000 (16:35 +0300)]
gcc80: Bring in makefiles but leave them unhooked.
Makefile infrastructure was reused from gcc50 one writen by John Marino.
zrj [Wed, 2 May 2018 13:34:50 +0000 (16:34 +0300)]
gcc80: Handle TZ specific "%+" format in strftime.
After removal of %b and %r formats from kernel,
only one extra format remains.
Requested-by: swildner
zrj [Wed, 2 May 2018 13:32:23 +0000 (16:32 +0300)]
gcc80: Remove throw() from protos in libstdc++ headers.
The throw() as dynamic exception specificators was deprecated in c++11
and removed in c++17 (empty was made as an alias to noexcept(true)).
Our libc headers does not have the __attribute__(__nothrow__) markups.
To make libstdc++ fully usable for clangs on DragonFly it makes sense
to just remove the throw() additions in c++ language binding headers.
Previously in gcc50 we were excluding them just for __clang__ case as in:
838772be3c028f0cfd9fae5da181858e4199863a
zrj [Wed, 2 May 2018 13:19:51 +0000 (16:19 +0300)]
gcc80: Include <stdlib.h> for alloca() prototype.
zrj [Wed, 2 May 2018 13:18:32 +0000 (16:18 +0300)]
gcc80: Add alternative variant of pthread presence checking.
Port the
5f76495ba37ea12fb60cf57228cc78b83d889fb from gcc50.
zrj [Wed, 2 May 2018 13:17:46 +0000 (16:17 +0300)]
gcc80: Adjust search paths for base compiler layout.
All tools are located in a common /usr/libexec/gcc80/ directory.
zrj [Wed, 2 May 2018 13:14:32 +0000 (16:14 +0300)]
gcc80: Adjust default dynamic linker search location.
Needed for split root setups.
zrj [Wed, 2 May 2018 13:13:52 +0000 (16:13 +0300)]
gcc80: Document changes in contrib sources.
zrj [Wed, 2 May 2018 13:08:23 +0000 (16:08 +0300)]
Add READMEs for new vendor/GCC80 branch.
Next planned major gcc version update is gcc-11.0 in next three years.
Roadmap: gcc34 -> gcc41 -> gcc44 -> gcc47 -> gcc50 -> gcc80 [-> gcc11]
Sepherosa Ziehau [Mon, 14 May 2018 14:35:04 +0000 (22:35 +0800)]
x86_64/lapic: Use function pointer for EOI.
This helps upcoming X2APIC support and virtualization EOI optmization,
e.g. Hyper-V can be configured to do auto-EOI.
Discussed-with: Imre Vadasz
Sascha Wildner [Mon, 14 May 2018 09:36:05 +0000 (11:36 +0200)]
libc/termios: #undef TTYDEFCHARS after including <termios.h>.
Sascha Wildner [Mon, 14 May 2018 09:35:08 +0000 (11:35 +0200)]
kernel: Include <sys/ttydefaults.h> where appropriate.
This is in preparation for moving <sys/termios.h> to <termios.h>.
Sascha Wildner [Mon, 14 May 2018 07:04:37 +0000 (09:04 +0200)]
hammer2(8)/svc(8): Include <sys/ttycom.h> for ioctls.
zrj [Mon, 14 May 2018 04:36:02 +0000 (07:36 +0300)]
Merge remote-tracking branch 'origin/vendor/GCC80'
Sascha Wildner [Sun, 13 May 2018 09:25:54 +0000 (11:25 +0200)]
ipfw3: Fix kernel building without DEBUG in the config as well.
Sascha Wildner [Sun, 13 May 2018 08:08:02 +0000 (10:08 +0200)]
Fix LINT64 for the recent ipfw3 changes.
Reported-by: ftigeot
François Tigeot [Sun, 13 May 2018 07:41:31 +0000 (09:41 +0200)]
kernel: Remove vm_zeroidle.c
Background page zeroing doesn't bring any performance benefit
on modern hardware.
François Tigeot [Sun, 13 May 2018 07:13:59 +0000 (09:13 +0200)]
drm/linux: Add cond_resched()
Matthew Dillon [Sat, 12 May 2018 03:50:07 +0000 (20:50 -0700)]
kernel - pack struct fid
* Use __packed for struct fid for correctness. Does not change generated
code.
Matthew Dillon [Sat, 12 May 2018 03:48:39 +0000 (20:48 -0700)]
tmpfs - Fix tmpfs_fid, fix NFS exports
* Fix the tmpfs_fid structure, the 64-bit elements made it incompatible
with the system fid mapping.
This fixes NFS exports of a tmpfs filesystem.
* Fix tmpfs_fhtovp, the inode number can exceed tmp->tm_nodes_max,
do not error-out in that case.
Bill Yuan [Sat, 12 May 2018 15:26:07 +0000 (15:26 +0000)]
ipfw3_nat: highspeed lockless in-kernel NAT
RB-Tree to stored the state for the outgoing packets, and multidimentional
array of pointers to keep the state for the incoming packets.
Sascha Wildner [Fri, 11 May 2018 10:06:50 +0000 (12:06 +0200)]
mtree(8): Fix crc() prototype.
It is taken from usr.bin/cksum/crc.c. This fixes a -Wlto-type-mismatch
warning reported by zrj. Similar to the fix for ckdist(1) as pushed in
e69bb3d9c4c6d6073c9c9c4a54753458fae55c7e.
Sascha Wildner [Fri, 11 May 2018 09:46:03 +0000 (11:46 +0200)]
rpc.yppasswdd(8): Fix ok_shell() prototype.
It is taken from usr.bin/chpass/util.c. This fixes a -Wlto-type-mismatch
warning reported by zrj.
Sascha Wildner [Thu, 10 May 2018 17:51:34 +0000 (19:51 +0200)]
tcp_wrappers: Remove mystdarg.h and simplify code.
This fixes an -Wlto-type-mismatch warning (reported by zrj) because
syslog()'s prototype was wrongly setup (using VARARGS but it has to
take 2 arguments).
Sascha Wildner [Thu, 10 May 2018 07:21:13 +0000 (09:21 +0200)]
mount{,_ufs}(8): Remove unnecessary code to prevent warnings.
Matthew Dillon [Wed, 9 May 2018 23:51:44 +0000 (16:51 -0700)]
vkernel - Adjust to fix buildkernel
* Adjust to fix buildkernel
Sascha Wildner [Tue, 8 May 2018 19:22:18 +0000 (21:22 +0200)]
ckdist(1): Sync with FreeBSD.
Not much to see, but it allows us to raise WARNS to 6, and the crc()
prototype adjustment part also fixes a -Wlto-type-mismatch warning
that was..
Reported-by: zrj
zrj [Wed, 2 May 2018 13:07:02 +0000 (16:07 +0300)]
Import GCC-8 to a new vendor branch
Matthew Dillon [Tue, 8 May 2018 16:33:19 +0000 (09:33 -0700)]
kernel - Refactor copyin, copyout
* Conditionalize movsq/movsb sequences to improve performance.
Matthew Dillon [Sun, 6 May 2018 05:47:07 +0000 (22:47 -0700)]
kernel - Rearrange struct vm_zone slightly
* Rearrange struct vm_zone to group cache lines together a bit better.
Matthew Dillon [Sun, 6 May 2018 04:52:37 +0000 (21:52 -0700)]
kernel - Refactor bcmp, bcopy, bzero, memset
* For now continue to use stosq/stosb, movsq/movsb, cmpsq/cmpsb sequences
which are well optimized on AMD and Intel. Do not just use the '*b'
string op. While this is optimized on Intel it is not optimized on
AMD.
* Note that two string ops in a row result in a serious pessimization.
To fix this, for now, conditionalize the movsb, stosb, or cmpsb op so
it is only executed when the remaining count is non-zero. That is,
assume nominal 8-byte alignment.
* Refactor pagezero() to use a movq/addq/jne sequence. This is
significantly faster than movsq on AMD and only just very slightly
slower than movsq on Intel.
* Also use the above adjusted kernel code in libc for these functions,
with minor modifications. Since we are copying the code wholesale,
replace the copyright for the related files in libc.
* Refactor libc's memset() to replicate the data to all 64 bits code and
then use code similar to bzero().
Reported-by: mjg_ (info on pessimizations)
Matthew Dillon [Fri, 4 May 2018 17:48:29 +0000 (10:48 -0700)]
kernel - Optimize syscall path, remove old unused compat code
* Use the built-in memcpy with a constant length for the register arg
copy instead of calling bcopy(). This saves us 25ns.
* Remove several system call compatibility support features that are
no longer used (as we no longer have a linux compat module). We
remove sv_mask and sv_prepsyscall. Saves 1ns (woo woo!).
* Do some minor rearrangement of code to remove additional unnecessary
conditionals.
Matthew Dillon [Fri, 4 May 2018 04:58:40 +0000 (21:58 -0700)]
kernel - Adjust pv caching a little
* Rearrange pv_cache() usage to remove a conditional.
* Use atomic_fcmpset_*() to improve performance a little.
Matthew Dillon [Tue, 1 May 2018 03:50:13 +0000 (20:50 -0700)]
kernel - Flesh out Spectre mitigation support
* Add handling for all modes for AMD CPUs, including support for
IBRS_AUTO and STIBP_AUTO (always-on) bits which will be added
to future cpus.
* Add STIBP handling to Intel CPUs. I can't find definitions for
AUTO (always-on) modes for Intel, so those are still not supported
(no current CPU has AUTO support yet anyway).
* Current DragonFlyBSD defaults: Will enable IBRS_AUTO and STIBP_AUTO
(always on) support by default if the cpu has it. Will NOT enable IBRS
or STIBP (non-auto) toggling by default. Will not enable IBPB by default.
IBPB is currently not enabled by default. The overhead is an enormous
~2uS. We will follow Linux in this regard.
* Change the machdep.spectre_mitigation sysctl to take a string of
features to enable. Change machdep.spectre_support to display a
string of features supported. Possible features are:
IBRS Indirect Branch Restricted Speculation (U->K and K->U)
STIBP Single Thread Indirect Branch Prediction (U->K and K->U)
IBPB Branch Prediction Barrier (U->K)
IBRS_AUTO IBRS always-on (set once and forget)
STIBP_AUTO STIBP always-on (set once and forget)
The machdep.spectre_support sysctl tells you whats available.
* Refactor tr_pcb_gflags into tr_pcb_spec_ctrl[2] to make it easier
for the assembly code to program the SPEC_CTRL MSR.
* Note that some of the above bits will never be supported by current
hardware and exist to allow future hardware to support these features
in a less expensive manner.
* Also note that for Meltdown, AMD is immune and the meltdown mitigation
will not be enabled. Intel is vulnerable and the mitigation will be
enabled by default. See sysctl machdep.meltdown_mitigation.
Matthew Dillon [Tue, 1 May 2018 03:47:20 +0000 (20:47 -0700)]
kernel - Fix CVE-2018-8897, debug register issue
* #DB can be delayed in a way that causes it to occur on the first
instruction of the int $3 or syscall handlers. These handlers must
be able to detect and handle the condition. This is a historical
artifact of cpu operation that has existed for a very long time on
both AMD and Intel CPUs.
* Fix by giving #DB its own trampoline stack and a way to load a
deterministic %gs and %cr3 independent of the normal CS check.
This is CVE-2018-8897.
* Also fix the NMI trampoline while I'm here.
* Also fix an old issue with debug register trace traps which can
occur when the kernel is accessing the user's address space.
This fix was lost years ago, now recovered.
Credits: Nick Peterson of Everdox Tech, LLC (original reporter)
Credits: Thanks to Microsoft for coordinating the OS vendor response
Sascha Wildner [Tue, 8 May 2018 09:22:50 +0000 (11:22 +0200)]
Raise WARNS to 1 in gnu/usr.bin/cvs.
Sascha Wildner [Tue, 8 May 2018 08:48:38 +0000 (10:48 +0200)]
config.8: Mention NO_KERNEL_OLD_STRIP.
Sascha Wildner [Mon, 7 May 2018 16:13:41 +0000 (18:13 +0200)]
kernel/nfs: Use the correct prototype for sys_nfssvc().
The code handles loading of nfs.ko (nfssvc() is the only {,un}loadable
syscall). sys_nfssvc()'s prototype is automatically generated, so just
use that.
The sy_narg setting is not strictly needed because it is already
initialized correctly. Just the sy_call pointer is either sys_nosys
or sys_nfssvc, depending on the module load.
Reported-by: zrj
Sepherosa Ziehau [Mon, 7 May 2018 14:55:46 +0000 (22:55 +0800)]
igb: Dump registers.
This helps debugging.
Obtained-from: dillon
Sascha Wildner [Mon, 7 May 2018 12:43:02 +0000 (14:43 +0200)]
mrsas(4): Remove wrong extra arg from MR_LdBlockSizeGet().
Reported-by: zrj
François Tigeot [Mon, 7 May 2018 07:42:24 +0000 (09:42 +0200)]
drm/i915: Start building i915_gpu_error.c
François Tigeot [Mon, 7 May 2018 07:02:10 +0000 (09:02 +0200)]
drm/linux: Add scnprintf()
Obtained-from: FreeBSD
François Tigeot [Mon, 7 May 2018 05:45:28 +0000 (07:45 +0200)]
drm/linux: Add or improve various *printf functions
François Tigeot [Mon, 7 May 2018 05:28:35 +0000 (07:28 +0200)]
drm/linux: Start using stop_machine.h
Sascha Wildner [Sun, 6 May 2018 20:20:20 +0000 (22:20 +0200)]
Sync zoneinfo database with tzdata2018e from ftp://ftp.iana.org/tz/releases
* North Korea switched back from +0830 to +09 on May, 5.
* Miscellaneous changes, see NEWS.
For a detailed list of changes, see share/zoneinfo/NEWS.
Sascha Wildner [Sun, 6 May 2018 17:05:15 +0000 (19:05 +0200)]
ppp(8): Don't go via <sys/tty.h> for bringing in <termios.h>.
Include it directly.
Sascha Wildner [Sun, 6 May 2018 16:25:14 +0000 (18:25 +0200)]
<unistd.h>: Remove 'restrict' from symlink().
Neither NetBSD, OpenBSD, glibc, nor any standard I checked has them.
Discussed-with: zrj
Sascha Wildner [Sun, 6 May 2018 15:18:12 +0000 (17:18 +0200)]
<libgen.h>: Add comments about POSIX diffs for {base,dir}name().
François Tigeot [Sun, 6 May 2018 14:42:05 +0000 (16:42 +0200)]
drm/linux: Add do_gettimeofday()
François Tigeot [Sun, 6 May 2018 14:33:01 +0000 (16:33 +0200)]
drm: Sync include directives with Linux
* Add a few key include/asm or include/linux headers
* Move some code from .h to .c files in order to avoid clashes
between the DragonFly and Linux variants of kmalloc() and kfree()
Sascha Wildner [Sat, 5 May 2018 21:10:01 +0000 (23:10 +0200)]
Add NetBSD's orders(7) manual page.
Sascha Wildner [Sat, 5 May 2018 20:12:02 +0000 (22:12 +0200)]
libc/termios: Sync a bit with FreeBSD.
Add tcsetsid() to libc.
Taken-from: FreeBSD
Dports-testing: zrj
Sascha Wildner [Sat, 5 May 2018 20:07:33 +0000 (22:07 +0200)]
libc: Add strsuftoll{,x}()
In preparation for makefs(8).
Various dports (such as ftp/tnftpd) will also pick it up.
Taken-from: NetBSD
Dports-testing: zrj
Sascha Wildner [Mon, 30 Apr 2018 11:04:39 +0000 (13:04 +0200)]
libc/{un,}vis: Remove some useless junk. _DIAGASSERT() is defined.
Sascha Wildner [Sat, 5 May 2018 18:39:20 +0000 (20:39 +0200)]
Fix a few typos across the tree.
Sascha Wildner [Sat, 5 May 2018 12:11:45 +0000 (14:11 +0200)]
Makefile_upgrade.inc: Move dot.rhosts to the right place.
zrj [Fri, 4 May 2018 14:10:08 +0000 (17:10 +0300)]
libc/stdtime: Avoid signed overflow in mktime.
Fixes runtime issue with gcc80 -O2 constant folding. We need to use
__generic() macro to properly detect and set LONG_MIN/LONG_MAX here.
zrj [Fri, 4 May 2018 11:29:02 +0000 (14:29 +0300)]
boot/pc32: Avoid issues at -O2.
The 32-bit Legacy boot loader is intended to be compiled at -O1
optimization level. It is easy to forget this when overriding cflags.
For now do not use of frame pointer register as a general register.
zrj [Thu, 26 Apr 2018 09:38:18 +0000 (12:38 +0300)]
libstand/quad.h: Rename __qdivrem() to __udivmoddi4().
The gcc80 at -O2 emits calls to __udivmoddi4() in loader.
Boot-tested.
zrj [Sat, 28 Apr 2018 05:30:03 +0000 (08:30 +0300)]
calloc - Work around gcc-8 bug (2).
GCC-8 at -O2 improperly tries to optimize calloc() replacement even for
malloc+bzero sequence back to calloc from calloc itself. This affects
both main root's shell (tcsh as default) and ld-elf.so dynamic linker.
Explicitly use -fno-builtin-malloc to prevent that at any -Ox level.
zrj [Thu, 26 Apr 2018 07:25:53 +0000 (10:25 +0300)]
watch(8): Add fallthrough.
Mainly to suppress the warning.
zrj [Thu, 26 Apr 2018 07:23:41 +0000 (10:23 +0300)]
rtadvd(8): Suppress implicit-fallthrough.
For now don't change logic and just suppress the warning.
zrj [Thu, 26 Apr 2018 07:16:56 +0000 (10:16 +0300)]
tset(1): Suppress implicit-fallthrough.
It looks like ESC character should be followed by space code.
For now don't change logic and just suppress the warning.
zrj [Thu, 26 Apr 2018 07:10:28 +0000 (10:10 +0300)]
limits(1): Add fallthrough.
In case of end of string fallthrough straight to default.
zrj [Thu, 26 Apr 2018 07:08:02 +0000 (10:08 +0300)]
ident(1): Suppress implicit-fallthrough warnings.
Logic looks to be OK.
zrj [Thu, 26 Apr 2018 07:02:30 +0000 (10:02 +0300)]
ps(1): Add fallthrough.
Fallthrough is intended here, check
4e1c727bebeb810ba7a97614113c24690d2da5e3.
zrj [Thu, 26 Apr 2018 06:53:22 +0000 (09:53 +0300)]
sed(1): Suppress implicit-fallthrough.
The enum in C is really an int in size and space and gcc80 warns on
switch default. Add explict errx() to avoid that. If compiler can prove
that default case would not be reached in linked script->type, then
statement will be optimized out.
zrj [Thu, 26 Apr 2018 06:36:34 +0000 (09:36 +0300)]
dma(8): Use FALLTHROUGH consistently.
Avoids -Wimplicit-fallthrough warnings.
zrj [Thu, 26 Apr 2018 06:29:58 +0000 (09:29 +0300)]
mount_smbfs(8): Mark usage() as dead.
Eitan Adler [Sat, 5 May 2018 07:11:14 +0000 (07:11 +0000)]
[skel] chase previous commit with file removal
Don't forget to remove the file in upgrade case.
Eitan Adler [Sat, 5 May 2018 06:59:11 +0000 (06:59 +0000)]
Remove rhosts from default template
The 'rcmds' were removed in
2458c6f4cb6284cf8c259e0e5bf12ff74ff41952.
Matthew Dillon [Fri, 4 May 2018 18:28:10 +0000 (11:28 -0700)]
kernel - Remove kthread exit debug kprintf()s
* Remove TDF_VERBOSE and debugging kprintf()s on kthread exit.
We don't need this debugging any more.
Reported-by: zrj
Matthew Dillon [Fri, 4 May 2018 17:46:02 +0000 (10:46 -0700)]
kernel - Fix spinlock bug introduced with windowing (2)
* Fix the fix for the spinlock bug to be the actual fix and not
a bad dream.
Reported-by: zrj
Tomohiro Kusumi [Thu, 3 May 2018 06:51:02 +0000 (23:51 -0700)]
sbin/mount_autofs: Use __DECONST() instead of local __UNCONST()
Matthew Dillon [Wed, 2 May 2018 17:19:01 +0000 (10:19 -0700)]
kernel - Fix spinlock bug introduced with windowing
* The exclusive spinlock contention code was improperly assuming that
non-zero EXCLWAIT bits prevented the SHARED bit from being set. This
is no longer true, shared locks can sometimes override EXCLWAIT.
This assumption could result in spin_lock() returning with a shared
lock instead of an exclusive lock.
* Fixed by ensuring that the SHARED bit is cleared when resolving the
contended exclusive lock.
* Should hopefully fix the pmap pv == NULL assertion.
Reported-by: dillon, zrj
Sepherosa Ziehau [Tue, 1 May 2018 12:11:33 +0000 (20:11 +0800)]
igb: Bring in WOL configuration from FreeBSD.
This does _not_ fix rebooting issue on certain LOM.
Tested-by: dillon
Obtained-from: FreeBSD
Sepherosa Ziehau [Tue, 1 May 2018 11:49:59 +0000 (19:49 +0800)]
netgraph7: Protect so_rcv properly
Reported-by: Markus Pfeiffer <markus.pfeiffer@morphism.de>
Tested-by: Markus Pfeiffer <markus.pfeiffer@morphism.de>
Matthew Dillon [Sun, 29 Apr 2018 01:06:19 +0000 (18:06 -0700)]
kernel - Refactor machdep.cpu_idle_hlt
* Refactor machdep.cpu_idle_hlt. Operation works essentially the
same way as before but the code is a lot easier to read.
* Refactor mode 3 to have ACPI call back into machdep when entering
a C1 halt. Continue using HLT for this situation as we aren't
really sure what ACPI may or may not have done. MONITOR/MWAIT
might not be appropriate.
* Fix bug in cpu_smp_stopped(). Just because cpu_mwait_hints is
non-zero does not mean that there is an index entry for CPU_MWAIT_C1.
Use the last entry based on cpu_mwait_hints instead.
* Note that machdep.cpu_idle_hlt mode 2 still doesn't work as intended.
Matthew Dillon [Sat, 28 Apr 2018 18:10:38 +0000 (11:10 -0700)]
systat - Enhance -pv display
* Enhance systat -pv. Add a delimeter between the totals rows and
the cpu rows, add average user, sys, intr, and idle% over all cpus,
add total collisions, and include a percentage of total system eaten
up by collisions.
Sascha Wildner [Sat, 28 Apr 2018 16:13:16 +0000 (18:13 +0200)]
Avoid absolute SYMLINKS in cpio(1), tar(1) and mailwrapper(8).
Matthew Dillon [Sat, 28 Apr 2018 03:55:34 +0000 (20:55 -0700)]
hammer - Add missing lock
* Add missing lock around hammer_redo_fifo_end_flush(). The missing
lock could result in an assertion under heavy loads.
Matthew Dillon [Sat, 28 Apr 2018 03:21:46 +0000 (20:21 -0700)]
kernel - Adjust the scheduler to fix nice +N glitches
* Swap the DIDYIELD and steal code. The steal code needs to
go first, allowing a more desirable thread to steal the uschedcp
designation from a less desirable thread.
* The DIDYIELD code also needs a need_user_resched() to interrupt the
currently running less desirable thread.
* Set a half-queue default for usched_dfly_fast_resched instead of 0.
This should reduce unnecessary ping-ponging of user threads that
belong to the same queue.
* Increase the dynamic priority range from 12 to 20 queues.
This ensures that a cpu-bound nice -20 process cannot completely
override a nice +0 process, and ensures that a nice +20 process
does not complete stall against a nice +0 cpu-bound process.
That would be '16'. We set it to 20 to give ourselves some headroom.
* Remove some dead code.
* These changes fix relative priority glitches. More desirable
threads no longer glitch waiting for a significantly less desirable
thread to switch away on the current cpu, reducing the switch
latency from 1+ scheduler ticks to a few microseconds.
This allows nice +N processes and dynamic priority adjustments
to run in the background fully cpu-bound.
Matthew Dillon [Fri, 27 Apr 2018 18:41:12 +0000 (11:41 -0700)]
kernel - Improve indefinite macros a bit
* Delay saving SMP collision info and label string for a few loops
so we don't lose performance by doing it after the contested lock has
been resolved.
Sascha Wildner [Fri, 27 Apr 2018 15:05:14 +0000 (17:05 +0200)]
termios.4: Improve markup.
Matthew Dillon [Fri, 27 Apr 2018 06:43:15 +0000 (23:43 -0700)]
kernel - Add two debug variables to struct globaldata
* Add two debug variables to struct globaldata. These variables
can be used in assembly to debug difficult issues and accessed
in kgdb or by IPI failure alerts.
Matthew Dillon [Fri, 27 Apr 2018 06:11:07 +0000 (23:11 -0700)]
kernel - Fix several usched nits
* Fix an issue where a usched-restricted process is pulled onto a
cpu that is outside of its mask. The process will immediately
push itself back onto a cpu in its mask, but this bug leads to
unwanted cpu ping ponging.
* Fix an issue where cpu-bound usched-restricted processes can
cause other processes to be misscheduled at a lower priority
than their actual priority, resulting in unexpected stuttering.
* With these changes, nice +/- priorities should work considerably
better. In the normal case, alotted cpu time will be as shown
below. This is intended to be non-linear:
1 RQ0N 1:42.11 forever
2 R0N 1:22.55 forever
3 R0N 0:51.46 forever
4 RQ0N 0:24.23 forever
5 R0N 0:23.12 forever
6 RQ0N 0:19.91 forever
7 RQ0N 0:09.08 forever
8 RQ0N 0:08.38 forever
9 RQ0N 0:06.46 forever
10 RQ0N 0:06.72 forever
11 RQ0N 0:04.65 forever
12 RQ0N 0:04.60 forever
13 RQ0N 0:03.04 forever
14 RQ0N 0:02.53 forever
15 RQ0N 0:02.16 forever
16 RQ0N 0:01.55 forever
17 RQ0N 0:01.25 forever
18 RQ0N 0:00.81 forever
19 RQ0N 0:00.76 forever
20 RQ0N 0:00.32 forever
* In addition, dynamic priority operation should also work better with
these changes.
* WARNING! With this change, nice values actually work as intended. A
nice +20 process will get very little cpu in the face of a cpu-bound
nice +0 process on a cpu. Similarly, a cpu-bound nice -20 process will
allow nice +0 processes to barely function on a cpu.
And if you use an even larger spread, a cpu-bound nice -20 process
will not allow a nice +1 or higher process any cpu time at all.
Having multiple cores mitigations this somewhat, but users must be
careful especially when specifying negative nice values for processes.
* If you run X and have jerkiness issues due to process load, you may want
to give the X server itself around a nice -5. You can fiddle, but in
basic testing with everything running at nice 0, the scheduler appears
to do a pretty good just generally. For example, if your browser is
so overloaded that it has essentially become cpu bound, it will get cpu
on an equal basis with batch jobs like bulk builds.
zrj [Thu, 26 Apr 2018 11:49:16 +0000 (14:49 +0300)]
lib/i18n_module: Fix out of bounds bug.
Taken-from: NetBSD
zrj [Thu, 26 Apr 2018 10:55:13 +0000 (13:55 +0300)]
gcore(1): Mark as breaking strict aliasing.
IS_ELF(*(Elf_Ehdr *)&exec).
zrj [Thu, 26 Apr 2018 10:49:33 +0000 (13:49 +0300)]
tip(1): Mark as breaking strict aliasing.
The boolean(v) macro uses type-punned pointers.
zrj [Thu, 26 Apr 2018 10:38:01 +0000 (13:38 +0300)]
gcc50: Fix false positive for -Walloc-size-large-than.
Backport fix for PR 79132, prevent using alloca(-1).
zrj [Thu, 26 Apr 2018 10:35:33 +0000 (13:35 +0300)]
gcc47: Fix false positive for -Walloc-size-large-than.
Backport fix for PR 79132, prevent using alloca(-1).
Sascha Wildner [Thu, 26 Apr 2018 16:17:33 +0000 (18:17 +0200)]
mpsutil(8): Add missing braces.
Reported-by: zrj
zrj [Wed, 25 Apr 2018 16:22:13 +0000 (19:22 +0300)]
bsd.sys.mk: Implement WARNS framework for HOST_CCVER.
Previously we were handling just a CCVER only.
zrj [Wed, 25 Apr 2018 16:21:40 +0000 (19:21 +0300)]
world: Mark all build-tools.
zrj [Wed, 25 Apr 2018 16:20:33 +0000 (19:20 +0300)]
csh(1): Separate hostprog.
zrj [Wed, 25 Apr 2018 16:20:06 +0000 (19:20 +0300)]
awk(1): Separate hostprog.
zrj [Wed, 25 Apr 2018 16:19:40 +0000 (19:19 +0300)]
libmagic(3): Separate hostprog.
Set WARNS=1 for mkmagic.nx so as not to use -w.