Commit Graph

2782 Commits

Author SHA1 Message Date
Matthew Dillon
c37c9620cd Enhance reassignbuf(). When a buffer cannot be time-optimally inserted
into vnode dirtyblkhd we append it to the list instead of prepend it to
    the list in order to maintain a 'forward' locality of reference, which
    is arguably better then 'reverse'.  The original algorithm did things this
    way to but at a huge time cost.

    Enhance the append interlock for NFS writes to handle intr/soft mounts
    better.

    Fix the hysteresis for NFS async daemon I/O requests to reduce the
    number of unnecessary context switches.

    Modify handling of NFS mount options.  Any given user option that is
    too high now defaults to the kernel maximum for that option rather then
    the kernel default for that option.

Reviewed by:	 Alfred Perlstein <bright@wintelcom.net>
2000-01-05 05:11:37 +00:00
Tor Egge
82916a1126 ISA device drivers use the ISA source interrupt number in locations where
the low level interrupt handler number should be used.  Change
setup_apic_irq_mapping() to allocate low level interrupt handler X (Xintr${X})
for any ISA interrupt X mentioned in the MP table.

Remove an assumption in the driver for the system clock (clock.c) that
interrupts mentioned in the MP table as delivered to IOAPIC #0 intpin Y
is handled by low level interrupt handler Y (Xintr${Y}) but don't assume
that low level interrupt handler 0 (Xintr0) is used.

Don't allocate two low level interrupt handlers for the system clock.
Reviewed by:	NOKUBI Hirotaka <hnokubi@yyy.or.jp>
2000-01-04 22:24:59 +00:00
Poul-Henning Kamp
fb01c24c11 Be more careful about NOUDEV and NODEV.
Submitted by:	bde
2000-01-04 12:51:50 +00:00
Poul-Henning Kamp
6a77f60d4a Create a separate pps_offset variable to use for applying the
hardpps() produced offset component.  This is tested and behaved
stable with frequency offsets from -338.05 to +499.91 PPM.

Interestingly the machine I tested this on would fail if the clock
were slower than 14.3132 MHz whereas it was perfectly happy to run
at 16.384 MHz, in other words [-340PPM ... +14.4%]

Make pps_shift tweakable with sysctl.
2000-01-04 12:04:39 +00:00
Poul-Henning Kamp
b9effc8901 truss /usr/bin/su
login (or not if root)
	then exit the shell

truss will get stuct in tsleep

I dont know if this is correct, but it fixes the problem and
according to the commends in pioctl.h, PF_ISUGID is set when we
want to ignore UID changes.

The code is checking for when PF_ISUGID is not set and since it
never is set, we always ignore UID changes.

Submitted by:	Paul Saab <ps@yahoo-inc.com>
2000-01-03 14:26:47 +00:00
Poul-Henning Kamp
19c5221906 Don't use time_offset as a leaky bucket variable in hardpps(), this
resulted in vastly optimistic offset values reported to userland
(typically a factor 40+ too small).  Apart from that, the code had
two sign-bugs.

Apply the hardpps() phase with the right sign with a simply
scaling by integration interval.  (This may be too stiff at
long integration intervals, see below).

Allow pps_shiftmax to be reduced again.

Before this, the phase lock in hardpps() were broken, but due to
two bugs mostly cancelling out, it would end up basically working
with a large stochastic component.  Now it behaves as one would
expect: smooth and quiet.

It seems that pps_shiftmax above 7..9 somewhere makes the phaselock
too weak to hold onto random walk phase errors from a HP-105 OCXO,
which basically means that it is too weak for real-life use with
such integration times.  This is yet to be resolved.

Submitted to:	Prof. Dave "NTP" Mills.
Tested by:	Terje Mathisen <Terje.Mathisen@hda.hydro.com>
1999-12-29 14:39:24 +00:00
Peter Wemm
8b70d192e3 Remove vnode_if.sh - it's a perl script. This stayed around for a while
because bsd.kmod.mk is usually out of sync with kernel source.  However
bsd.kmod.mk has to be updated now because of the _KERNEL change so there
is no need to keep this (pre-repo copy) version around.
1999-12-29 05:37:14 +00:00
Peter Wemm
c447342094 Change #ifdef KERNEL to #ifdef _KERNEL in the public headers. "KERNEL"
is an application space macro and the applications are supposed to be free
to use it as they please (but cannot).  This is consistant with the other
BSD's who made this change quite some time ago.  More commits to come.
1999-12-29 05:07:58 +00:00
Mike Smith
736e4b67ae Actively limit the allocation of mbufs to NMBUFS/nmbufs and mbuf clusters
to NMBCLUSTERS/nmbclusters/kern.ipc.nmbclusters.

Add a read-only sysctl kern.ipc.nmbufs matching kern.ipc.nmbclusters.

Submitted by:	Bosko Milekic <bmilekic@dsuper.net>
1999-12-28 06:35:57 +00:00
Bruce Evans
654f6be1c8 Changed the type used to represent the user stack pointer from `long *'
to `register_t *'.  This fixes bugs like misplacement of argc and argv
on the user stack on i386's with 64-bit longs.  We still use longs to
represent "words" like argc and argv, and assume that they are on the
stack (and that there is stack).  The suword() and fuword() families
should also use register_t.
1999-12-27 10:42:55 +00:00
Bruce Evans
9f79feec16 Fixed some type mismatches. p_retval[0] in struct proc has type
register_t, so pointers to it must be passed around as `register_t *',
not as `int *'.  The type mismatches were non-benign on alphas, but
the broken code is normally only configured by LINT.
1999-12-27 10:22:09 +00:00
Brian Feldman
c2696359ab Correct an uninitialized variable use, which, unlike most times, is
actually a bug this time.

Submitted by:	bde
Reviewed by:	bde
1999-12-27 06:31:53 +00:00
Bruce Evans
f85bdfcc66 Removed unused includes.
Rumoved unused compatibility cruft for dup().  Using it today would just
break dup() on fd's >= 64.

Fixed some style bugs.
1999-12-26 14:07:43 +00:00
Bruce Evans
da211f5bf6 Use vfs_timestamp() instead of getnanotime() to set timestamps. This
fixee incoherency of pipe timestamps relative to file timestamps in
the usual case where getnanotime() is not used for the latter.  (File
and pipe timestamps are still incoherent relative to real time unless
the vfs_timestamp_precision sysctl is set to 2 or 3).
1999-12-26 13:04:52 +00:00
Doug Rabson
54ac5b9b76 * Set the devclass of a device before calling the probe method. This allows
device_printf() etc. to print something intelligible.
* Allow device_set_devclass(dev, 0) for clearing the devclass.
1999-12-24 16:21:15 +00:00
Bruce Evans
586453fee2 Fixed a cast of a pointer to an integer of a possibly different size.
Fixed casts of non-`void *' pointers to uintptr_t.  Fixed related
style bugs.  This file uses perfectly non-KNF formatting for casts.
1999-12-24 15:33:36 +00:00
Kirk McKusick
02b0085406 Prettyness police: Identify flags in b_xflags with BX_ to distinguish
them from flags in b_flags which are prefixed with B_
1999-12-22 03:11:04 +00:00
Alfred Perlstein
80ef02b65d regenerate after making getfh a standard syscall. 1999-12-21 20:21:48 +00:00
Alfred Perlstein
20883b0f10 make getfh a standard syscall instead of dependant on having
NFSSERVER defined, useful for userland fileservers that want to
use a filehandle type interface to the filesystem.

Submitted by: Assar Westerlund assar@stacken.kth.se
PR: kern/15452
1999-12-21 20:21:12 +00:00
Eivind Eklund
369dc8ceb8 Change incorrect NULLs to 0s 1999-12-21 11:14:12 +00:00
Matthew Dillon
8f95b97072 Reimplement buf_daemon / getnewbuf() interaction for dealing with
stressful situations.  buf_daemon now makes a distinction between
    being woken up and its sleep timing out, and as a consequence is now
    much better able to dynamically tune itself to its environment.

Reviewed by:	Alfred Perlstein <bright@wintelcom.net>
1999-12-20 20:28:40 +00:00
Eivind Eklund
6357e7b507 Make m_print const correct (avoids a warning) 1999-12-20 18:10:00 +00:00
Greg Lehey
580e7e5a0f If we fail to find init, print out the search path used. This helps
differentiate between one of three different scenarios:

1.  No init.
2.  Path to init munged by an incorrect loader configuration.
3.  Root file system not mounted.

Reviewed-by:  billf
1999-12-20 02:50:49 +00:00
Poul-Henning Kamp
1b4ce5ce9b Don't ignore return value from tsleep().
Spotted by:	charnier
1999-12-19 12:36:41 +00:00
Robert Watson
91f37dcba1 Second pass commit to introduce new ACL and Extended Attribute system
calls, vnops, vfsops, both in /kern, and to individual file systems that
require a vfsop_ array entry.

Reviewed by:	eivind
1999-12-19 06:08:07 +00:00
Robert Watson
ef351daa32 First pass commit to introduce new ACL and Extended Attribute system calls.
The second pass commit with all the supporting code will happen shortly
afterwards.

Reviewed by:	eivind
1999-12-19 05:54:46 +00:00
Eivind Eklund
d776d82c4d Since VOP_LOCK can be used to up and downgrade locks, it is not possible
to say anything about the lockstate before and after it.  Thus, change the
lockspec from U L U to ? ? ?.
1999-12-18 23:01:52 +00:00
Brian Feldman
2cfa173c50 Woops, I'm so sorry I forgot this! From the last mbuf.h change:
m_mballoc_wakeup() (inline) -> MMBWAKEUP() (macro)
	m_clalloc_wakeup() (inline) -> MCLWAKEUP() (macro)

Noticed by:	peter
1999-12-18 20:04:19 +00:00
Eivind Eklund
762e6b856c Introduce NDFREE (and remove VOP_ABORTOP) 1999-12-15 23:02:35 +00:00
Brian Feldman
6c54410230 Bug fix:
The variables "m_mclalloc_wid" and "m_mballoc_wid" were not in the
proper place.  They should have been in uipc_mbuf.c and have been global,
not in mbuf.h and local per each file that uses mbuf.h.

Sorta bug fix:
   In mbuf.h, the definitions of various things for KERNEL and not
KERNEL cases were very screwy.   This fixes all of that which I could
find.
1999-12-14 02:23:14 +00:00
Tor Egge
f52523701c Fix two problems with pipe_write():
1. Data written beyond end of pipe buffer, causing kernel memory corruption.

    - Check that space is still valid after obtaining the pipe lock.

    - Defer the calculation of transfer size until the pipe
      lock has been obtained.

    - Update the pipe buffer pointers while holding the pipe lock.

 2. Writes of size <= PIPE_BUF not always atomic.

    - Allow an internal write to span two contiguous segments,
      so writes of size <= PIPE_BUF can be kept atomic
      when wrapping around from the end to the start of the
      pipe buffer.

PR:		15235
Reviewed by:	Matt Dillon <dillon@FreeBSD.org>
1999-12-13 02:55:47 +00:00
Peter Wemm
6f77b2defc Use a seperate -c and -h mode. The vnode_if.c file is compiled only into
the kernel while the vnode_if.h header is a bunch of inlines to call the
code that is in the kernel. Generating the .h file on the fly is kinda
bogus because it has to match the one compiled into the kernel.

IMHO we should have kern/vnode_if.c and sys/vnode_if.h committed in the
tree but that's another battle.
1999-12-12 16:43:05 +00:00
Peter Wemm
cfdd238335 Put on asbestos suit and put a splcam() around the 'Mounting root from..'
message to stop it splitting.  Every single scsi machine I've seen seems
to reliably collide with this and it's rather annoying.
1999-12-12 16:34:43 +00:00
Peter Wemm
016fc47da3 The sysctl mod_xx hack is no longer required now that we have totally
dynamic sysctl registration.
1999-12-12 16:30:34 +00:00
Brian Feldman
f48b807fc0 This is Bosko Milekic's mbuf allocation waiting code. Basically, this
means that running out of mbuf space isn't a panic anymore, and code
which runs out of network memory will sleep to wait for it.

Submitted by:	Bosko Milekic <bmilekic@dsuper.net>
Reviewed by:	green, wollman
1999-12-12 05:52:51 +00:00
Matthew Dillon
3854a87ef3 Remove accidental pollution unrelated to previous commit. The issue
here is real but has not yet been discussed with Eivind.
1999-12-12 03:28:14 +00:00
Matthew Dillon
4f79d873c1 Add MAP_NOSYNC feature to mmap(), and MADV_NOSYNC and MADV_AUTOSYNC to
madvise().

    This feature prevents the update daemon from gratuitously flushing
    dirty pages associated with a mapped file-backed region of memory.  The
    system pager will still page the memory as necessary and the VM system
    will still be fully coherent with the filesystem.  Modifications made
    by other means to the same area of memory, for example by write(), are
    unaffected.  The feature works on a page-granularity basis.

    MAP_NOSYNC allows one to use mmap() to share memory between processes
    without incuring any significant filesystem overhead, putting it in
    the same performance category as SysV Shared memory and anonymous memory.

Reviewed by: julian, alc, dg
1999-12-12 03:19:33 +00:00
Eivind Eklund
6bdfe06ad9 Lock reporting and assertion changes.
* lockstatus() and VOP_ISLOCKED() gets a new process argument and a new
  return value: LK_EXCLOTHER, when the lock is held exclusively by another
  process.
* The ASSERT_VOP_(UN)LOCKED family is extended to use what this gives them
* Extend the vnode_if.src format to allow more exact specification than
  locked/unlocked.

This commit should not do any semantic changes unless you are using
DEBUG_VFS_LOCKS.

Discussed with:	grog, mch, peter, phk
Reviewed by:	peter
1999-12-11 16:13:02 +00:00
Peter Wemm
4537138981 Zap c_index() and c_rindex(). Bruce prefers these to implicitly convert
a const into a non-const as they do in libc.  I feel that defeating the
type checking like that quite evil, but that's the way it is.
1999-12-10 17:38:41 +00:00
Poul-Henning Kamp
2ac0d0a1f7 Make adjtime(2) adjust boottime so it doesn't cause non-monotonous
uptime.
1999-12-08 10:02:12 +00:00
Poul-Henning Kamp
e8452d59e3 Scan cdevs for potential root devices, rather than bdevs. 1999-12-08 10:01:18 +00:00
Poul-Henning Kamp
7d5961670c Remove BAD144 support, it has already been disabled for some time. 1999-12-08 09:33:00 +00:00
Mike Smith
9eec696993 Change the default poweroff delay from 0 to 5 seconds. This seems to be
adequate for the IDE disks that I have available for testing.  Most seem
to wait between 1 and 3 seconds before flushing their caches.

Add the ability to override the delay at compile time via the
undocumented option POWEROFF_DELAY.  The delay can still be set via
sysctl as it was originally implemented.
1999-12-07 04:35:37 +00:00
Poul-Henning Kamp
72dfe7a3d7 I always forget to check before I reboot a system, and while it
boots I try in vain to remember which month or even year this system
was last booted in.

Print out the uptime before rebooting, and give people like me
less (or more as it may be) to think about while the systems boots.
1999-12-06 22:35:51 +00:00
Peter Wemm
bb6a234e47 Put on my asbestos underwear and commit the patch that I posted to -arch
some time ago that changes kern.randompid from a boolean to a randomness
range for the next pid assigment.  Too high causes a lot of extra work
to scan for free pids, and too low merely wastes randomness entropy.  It's
still possible to select a completely random range by using PID_MAX (100k)
or -1 as a shortcut to mean "the whole range".
Also, don't waste randomness when doing a wraparound.
1999-12-06 11:13:50 +00:00
Luoqi Chen
91c28bfde0 User ldt sharing. 1999-12-06 04:53:08 +00:00
Matt Jacob
9efed284d5 correct incomplete last change 1999-12-03 09:10:04 +00:00
Matthew N. Dodd
fe0d408987 Remove the 'ivars' arguement to device_add_child() and
device_add_child_ordered().  'ivars' may now be set using the
device_set_ivars() function.

This makes it easier for us to change how arbitrary data structures are
associated with a device_t.  Eventually we won't be modifying device_t
to add additional pointers for ivars, softc data etc.

Despite my best efforts I've probably forgotten something so let me know
if this breaks anything.  I've been running with this change for months
and its been quite involved actually isolating all the changes from
the rest of the local changes in my tree.

Reviewed by:	peter, dfr
1999-12-03 08:41:24 +00:00
Nick Hibma
39e86a12aa Remove check for attached state.
sc = devclass_get_softc(devclass, unit);

doesn't return NULL during attach anymore, and produces the sc,
identical to (for devclass_get_unit(devclass, unit) != NULL that is):

   sc = device_get_softc(devclass_get_unit(devclass, unit));

Reviewed-by:   dfr
1999-12-02 16:30:21 +00:00
Archie Cobbs
1c38f2ea70 The functions m_copym() and m_copypacket() return read-only copies,
because in the case of mbuf clusters they only increment the reference
count rather than actually copying the data.

Add comments to this effect, and add a new routine called m_dup() that
returns a real, writable copy of an mbuf chain.

This is preliminary work required for implementing 'ipfw tee'.

Reviewed by:	julian
1999-12-01 22:31:32 +00:00