Commit Graph

1282 Commits

Author SHA1 Message Date
Andrey A. Chernov
7f533ff73f Add safety check in case "conflicts" keyword specified more times than
needed
1997-06-08 17:15:31 +00:00
Bruce Evans
7b3c84247b Preserve %fs and %gs across context switches. This has a relatively low
cost since it is only done in cpu_switch(), not for every exception.
The extra state is kept in the pcb, and handled much like the npx state,
with similar deficiencies (the state is not preserved across signal
handlers, and error handling loses state).
1997-06-07 04:36:10 +00:00
Doug Rabson
e90b93a1d0 Don't throw NFS B_DELWRI buffers back to the vm system in brelse.
Make sure that b_validoff..b_validend is at least as big as
b_dirtyoff..b_dirtyend.
1997-06-06 09:04:28 +00:00
Doug Rabson
501338ca4f Fix some performance problems with the NFS mmap fixes. 1997-06-03 09:42:43 +00:00
Doug Rabson
0c514a25a0 The defines INTR_FAST and INTR_EXCL are part of the public interface. The
previous commit made them private which broke things.
1997-06-02 10:46:28 +00:00
Doug Rabson
6d47a3a499 Change isa_device.h to intr_machdep.h 1997-06-02 10:44:08 +00:00
Doug Rabson
683523378c Move interrupt handling code from isa.c to a new file. This should make
isa.c (slightly) more portable and will make my life developing the really
portable version much easier.

Reviewed by:	peter, fsmp
1997-06-02 08:19:06 +00:00
Julian Elischer
939c19614c tiny spelling fix in comment 1997-06-02 04:56:38 +00:00
Peter Wemm
8c046d14dc Move "typedef struct intrec {} intrec" from sys/interrupt.h to kern_intr.c
since that's the only place that it's used.

Submitted by: se  (apparently on suggestion from dfr)
1997-06-01 16:05:14 +00:00
Peter Wemm
bf5acbf51f oops, fix a braino that I noticed during the commit.. Don't verify the
remaining time pointer if it's NULL, since we don't write back in that
case! (*blush*!)
1997-06-01 09:05:19 +00:00
Peter Wemm
5b870b7ba7 - implement signanosleep(2) by moving common code from nanosleep() into a
shared function.
- use p->p_sleepend to try and get more accurate "time remaining" results
when the time has been adjusted.
- verify writeability of return address so that we can fail before sleeping
if the address for the result is bogus.
1997-06-01 09:01:07 +00:00
Peter Wemm
83a6ec5e6a Regenerate 1997-06-01 08:56:12 +00:00
Peter Wemm
99f06d5c02 New syscall, signanosleep(), which is a hybrid of sigsuspend(2) and
nanosleep(2).  It sleeps until either the time expires, or a signal
permitted by the supplied mask arrives (eg: SIGALRM if appropriate)
1997-06-01 08:52:38 +00:00
Peter Wemm
4407ec71c7 <machine/spl.h> -> <machine/ipl.h>
s/intrmask/intrmask_t/g

Reviewed by: bde, se
1997-05-31 09:30:39 +00:00
Peter Wemm
5400ed3b2f Include file updates.. <machine/spl.h> -> <machine/ipl.h>, add
<machine/ipl.h> to those files that were depending on getting SWI_*
implicitly via <machine/cpufunc.h>
1997-05-31 09:27:31 +00:00
Doug Rabson
bc3718bb36 The previous fix didn't work properly for small block size filesystems,
which caused very slow file access for cd9660 and some ext2fs filesystems.

Reviewed by:	bde
1997-05-30 22:25:35 +00:00
Steve Passe
a8baaafda0 Code such as apic_base[APIC_ID] converted to lapic__id
Changes to pmap.c for lapic_t lapic && ioapic_t ioapic pointers,
currently equal to apic_base && io_apic_base, will stand alone with the
private page mapping.
1997-05-29 05:58:41 +00:00
Peter Wemm
64b3672f39 minor style police (recent divergence from KNF code) 1997-05-29 05:07:10 +00:00
Peter Wemm
ae9249615f remove opt_smp.h and fix the reason it was needed. 1997-05-29 05:04:30 +00:00
Peter Wemm
8f453f3ed3 Don't need "opt_smp.h" on these files 1997-05-29 04:52:04 +00:00
Stefan Eßer
f9220cde63 Fix problem reported by PHK: Panic in pcic probe because of NULL pointer
dereference (head->next in intr_disconnect).
1997-05-28 22:11:00 +00:00
Alexander Langer
b7564dc0b0 Define NPRIMES in terms of the number of elements in 'primes' (as opposed
to hardcoding it).
1997-05-28 00:47:27 +00:00
Steve Passe
c21701d99b Nuke the printing of the unredirect message unless bootverbose. 1997-05-27 19:28:10 +00:00
Stefan Eßer
425f9fda52 Add support for shared interrupts to the kernel. This code is meant
be (eventually) architecture independent. It provides an emulation
of the ISA interrupt registration function register_intr(), but that
function does no longer manipulated the interrupt controller and
interrupt descriptor table, but calls the architecture dependent
function setup_icu() for that purpose.

After theISA/EISA bus code has been modified to directly call the new
interrupt registartion functions (intr_create() and intr_connect()),
the emulation of register_intr() should be dropped.

The C level interrupt handler function should take a (void*) argument,
and the function pointer type (inthand2_t) should defined in some  other
place than isa_device.h.

This commit is a pre-requisite for the removal of the PCI specific shared
interrupt code.

Reviewed by:	dfr,bde
1997-05-26 14:37:43 +00:00
Steve Passe
1ffa54ef38 Added a test called 'LATE_START'.
This is now the default, it delays most of the MP startup to the function
machdep.c:cpu_startup().  It should be possible to move the 2 functions
found there (mp_start() & mp_announce()) even further down the path once
we know exactly where that should be...

Help from: Peter Wemm <peter@spinner.dialix.com.au>
1997-05-26 09:23:30 +00:00
Steve Passe
45fedb144d Broke up parse_mp_table() into 2 passes:
- The 1st (preparse_mp_table()) counts the number of cpus, busses, etc. and
   records the LOCAL and IO APIC addresses.
 - The 2nd pass (parse_mp_table()) does the actual parsing of info and recording
   into the incore MP table.

This will allow us to defer the 2nd pass untill malloc() & private pages
are available (but thats for another day!).
1997-05-25 02:49:03 +00:00
Steve Passe
7f6c65fa06 Now that panic() is properly printing messages for early SMP panics all
the 'printf("..."); panic("\n")' sections are returned to 'panic("...")'.
1997-05-24 18:48:53 +00:00
Steve Passe
47d818975b Move the printing of "cpu#%d" to AFTER the general panic argument string.
When a panic occurs early in the SMP boot process 'cpunumber()' hangs,
causing the panic string to be lost.  Now the system appears to hang
in 'breakpoint()', but at least the user sees the panic string before the
hang.
1997-05-24 18:35:44 +00:00
Peter Wemm
9f90798686 Attempt to convert the ip_divert code to use the new-style protocol request
switch.  I needed 'LINT' to compile for other reasons so I kinda got the
blood on my hands.  Note: I don't know how to test this, I don't know if
it works correctly.
1997-05-24 17:23:11 +00:00
Steve Passe
89921bb594 Convert all:
panic( "xxxxx\n" );

to:
 printf( "xxxxx\n" );
 panic( "\n" );

For some as yet undetermined reason the argument to panic() is often NOT
printed, and the system sometimes hangs before reaching the panic printout.
So we hopefully at least print some useful info before the hang, as oppossed to
leaving the user clueless as to what has happened.
1997-05-22 22:35:42 +00:00
Poul-Henning Kamp
c5318f2363 Remove cruft relating to p_selbits and p_selbits_size 1997-05-22 07:25:20 +00:00
Doug Rabson
32ad9cb531 Fix a few bugs with NFS and mmap caused by NFS' use of b_validoff
and b_validend.  The changes to vfs_bio.c are a bit ugly but hopefully
can be tidied up later by a slight redesign.

PR:		kern/2573, kern/2754, kern/3046 (possibly)
Reviewed by:	dyson
1997-05-19 14:36:56 +00:00
Tor Egge
432aad0e98 Bring in some kernel bootp support. This removes the need for netboot
to fill in the nfs_diskless structure, at the cost of some kernel
bloat. The advantage is that this code works on a wider range of
network adapters than netboot. Several new kernel options are
documented in LINT.
Obtained from: parts of the code comes from NetBSD.
1997-05-11 18:05:39 +00:00
Peter Wemm
708e768480 Fixes from Bruce:
Serious:
- An important timevalfix() in settime[ofday]() was lost.

Not so serious:
- There was a race initializing `delta' in the check for setting the
  time backwards.
- The `#ifdef notyet' check for setting the time more than a day forwards
  was back to front.
[[I deleted the code, it's useless because of iteration - Peter]]
- The timespec was not checked for validity in clock_settime().
- The timespec was not fully checked for validity in nanotime().  The
  check in itimerfix() is too late, since the conversion from a timespec
  to a timeval may overflow.
- A garbage timeval was checked in settimeofday() for the (uap->tv == NULL
  && uap->tzp != NULL) case.  I added the broken check this some time ago.

Cosmetic:
- The "inadvertantly (sic) sleeping forever" test always failed.  hzto()
  always returns >= 1.
- The style wasn't very KNFish.  (I only changed new code.)

Submitted by: bde
1997-05-10 12:00:03 +00:00
Joerg Wunsch
8eea4d3c76 Add a DDB command `show buffer', to display a struct buf. It's impossible
to display everything, so i've chosen a small subset.  Add more to this as
you think seems useful.
1997-05-10 09:09:42 +00:00
Brian Somers
f2cc6198fc Pay attention to what Bruce actually says
rather than what I think he's going to say.
(Now undoing the last timerval change)

Really suggested by:	bde
1997-05-10 06:04:23 +00:00
Brian Somers
93154d87be Don't require that it_interval be valid if
it_value is set to zero - as per documentation.

Suggested by: ache & bde
1997-05-10 05:29:41 +00:00
Peter Wemm
94c8fcd8fb Implementation of posix-style clock_* and nanosleep syscalls as implemented
in NetBSD.  The core of settimeofday() is moved to a seperate static
function settime() which both clock_settime() and settimeofday() call.

Note that I picked up the securelevel > 1 check from NetBSD that prevents
the clock being set backwards in high securelevel mode (this was a hole
that allowed resetting of inode access timestamps to arbitary values)

Obtained from:  mostly from NetBSD, but the settime() function is from
our gettimeofday(), some tweaks by me.
1997-05-08 14:16:25 +00:00
Peter Wemm
3a5322f2f0 regenerate 1997-05-08 14:08:49 +00:00
Peter Wemm
851679e514 oops. NODIDE -> NOHIDE 1997-05-08 14:07:11 +00:00
Peter Wemm
b6f031b70b Define entries for the posix-style clock/timer syscalls including
nanosleep().  Also, note some syscall conflicts with other systems and
indicate slots tagged for use with other syscalls some day.
1997-05-08 14:04:37 +00:00
Steve Passe
c2855f6e47 fix bug in get_isa_apic_mask() where EISA bus was ignored.
Submitted by:	 Peter Wemm <peter@spinner.DIALix.COM>
1997-05-07 22:25:27 +00:00
Peter Wemm
835834c085 md_regs is now a struct trapframe * 1997-05-07 20:08:53 +00:00
Doug Rabson
cea6c86c11 This is the kernel linker. To use it, you will first need to apply
the patches in freefall:/home/dfr/ld.diffs to your ld sources and set
BINFORMAT to aoutkld when linking the kernel.

Library changes and userland utilities will appear in a later commit.
1997-05-07 16:05:47 +00:00
Poul-Henning Kamp
8670684a2f Fix a race condition that did, after all, exist.
Reviewed by:	phk
Submitted by:	dfr
1997-05-06 15:19:38 +00:00
Steve Passe
75877d5a93 removed the "#error ..." line preventing casual invokation of SMP_AUTOSTART.
autostart appears to be working now, at least on my dual P6.
I have no explanation why....
1997-05-06 07:10:06 +00:00
Steve Passe
2479ac60b9 Code to handle SMP/APIC_IO mapping of ISA INTs to APIC pins above IRQ15.
- doesn't break my system.
 - NOT yet verified on the affected motherboard.

Submitted by:	"John S. Dyson" <toor@dyson.iquest.net>
1997-05-05 22:56:37 +00:00
John Dyson
b332d9a66e Make sure that *fork() always returns with %edx == 1 in the
child.  This was sometimes not happening correctly during my
threads code work.
1997-05-05 04:08:12 +00:00
Peter Wemm
b455e1e981 don't #ifdef out reference to i586_ctr_freq. 1997-05-04 14:28:22 +00:00
Poul-Henning Kamp
b15a966ec6 1. Add a {pointer, v_id} pair to the vnode to store the reference to the
".." vnode.  This is cheaper storagewise than keeping it in the
    namecache, and it makes more sense since it's a 1:1 mapping.

2.  Also handle the case of "." more intelligently rather than stuff
    the namecache with pointless entries.

3.  Add two lists to the vnode and hang namecache entries which go from
    or to this vnode.  When cleaning a vnode, delete all namecache
    entries it invalidates.

4.  Never reuse namecache enties, malloc new ones when we need it, free
    old ones when they die.  No longer a hard limit on how many we can
    have.

5.  Remove the upper limit on namelength of namecache entries.

6.  Make a global list for negative namecache entries, limit their number
    to a sysctl'able (debug.ncnegfactor) fraction of the total namecache.
    Currently the default fraction is 1/16th.  (Suggestions for better
    default wanted!)

7.  Assign v_id correctly in the face of 32bit rollover.

8.  Remove the LRU list for namecache entries, not needed.  Remove the
    #ifdef NCH_STATISTICS stuff, it's not needed either.

9.  Use the vnode freelist as a true LRU list, also for namecache accesses.

10. Reuse vnodes more aggresively but also more selectively, if we can't
    reuse, malloc a new one.  There is no longer a hard limit on their
    number, they grow to the point where we don't reuse potentially
    usable vnodes.  A vnode will not get recycled if still has pages in
    core or if it is the source of namecache entries (Yes, this does
    indeed work :-)  "." and ".." are not namecache entries any longer...)

11. Do not overload the v_id field in namecache entries with whiteout
    information, use a char sized flags field instead, so we can get
    rid of the vpid and v_id fields from the namecache struct.  Since
    we're linked to the vnodes and purged when they're cleaned, we don't
    have to check the v_id any more.

12. NFS knew about the limitation on name length in the namecache, it
    shouldn't and doesn't now.

Bugs:
        The namecache statistics no longer includes the hits for ".."
        and "." hits.

Performance impact:
        Generally in the +/- 0.5% for "normal" workstations, but
        I hope this will allow the system to be selftuning over a
        bigger range of "special" applications.  The case where
        RAM is available but unused for cache because we don't have
        any vnodes should be gone.

Future work:
        Straighten out the namecache statistics.

        "desiredvnodes" is still used to (bogusly ?) size hash
        tables in the filesystems.

        I have still to find a way to safely free unused vnodes
        back so their number can shrink when not needed.

        There is a few uses of the v_id field left in the filesystems,
        scheduled for demolition at a later time.

        Maybe a one slot cache for unused namecache entries should
        be implemented to decrease the malloc/free frequency.
1997-05-04 09:17:38 +00:00