1) check va before clearing the page clean flag. Not doing so was
causing the vnode pager error 5 messages when paging from
NFS. (pmap.c)
2) put back interrupt protection in idle_loop. Bruce didn't think
it was necessary, John insists that it is (and I agree). (swtch.s)
3) various improvements to the clustering code (vm_machdep.c). It's
now enabled/used by default.
4) bad disk blocks are now handled properly when doing clustered IOs.
(wd.c, vm_machdep.c)
5) bogus bad block handling fixed in wd.c.
6) algorithm improvements to the pageout/pagescan daemons. It's amazing
how well 4MB machines work now.
Changes _only_ take effect if `options LAPTOP' is set.
Note: This one is distinctly dodgy. When my IDE drive spins back up from sleep
mode, it generates this `extra interrupt' condition by spinning back up and
generating an intr, though without any particular action required. This
message coming out every time is rather annoying, and thus disabled.
However, what I'm not at all sure of is whether or not all IDE drives will
behave in the same way, or if perhaps it needs to be done in a more complicated
fashion by detecting this more involved "I've spun up and am just saying hi"
condition. This is a simple change and easy to back out/ammend if anybody has
any better ideas.
my previous fix too (using wdp_heads controller value) and check
0 heads case too.
Other fixes from Bruce:
2) Fix dk_timeout from 2 to about 4 seconds.
3) wdcontrol not retried on internal error.
4) wdwait return check changed ( "!=0" to "<0" into wdsetctlr,
"<0" to "!=0" into wdgetctlr).
Small hack, if heads > 16, output a warning and then set the head
count to 16. This stops the infinite loop on this error and allows
people to later fix the DOS parameter table later with fdisk.
o merged and fixed timeout code from sos.
o merged DOS partition support from sos.
o fixed "extra" interrupts.
o check if malloc retuns NULL :-(.
o print drive size as in NetBSD
o after an error, return the residual count, not 0.
o give up early for > 16 heads.
o cleaned up the old-drive detection in wdgetctlr().
o rewrote wddump(). I'd been putting this off because
I'd had the dump disabled since 0.0 and had no idea
if even the standard version worked. It didn't:
(0) syscons' sgetc() interface broke some keyboard
stuff.
(1) CADDR1 is mapped using pmap() and pmap got a NULL
pointer trap (at least when I got to wddump() using
call diediedie from ddb) because the pte for CADDR1
is only supposed to be hacked on directly (e.g. in
physcopyseg()).
(2) bad144 handling was not done.
(3) it was slooow (3600 sectors/minute) because my
controller doesn't cache writes.
o miscellaneous other cleanups, e.g., removed scattered
patchkit/terry dates.
o lots of reformatting.
To be done:
o Merge/fix TIH/NetBSD bad144 code (doesn't belong in any
particular driver. Why aren't we using i386/dkbad.c?).
o Merge/fix Dyson/NetBSD clustering code (large parts
should be shared).
o Fix/extend the partition in use bits. Support extended
partitions. This should be shared by all disk drivers. Swap
to a DOS partition so that the swap space can be shared with
linux.
o Don't use polling except for initialization. Need to
reorganise the state machine. Then "extra" interrupts
shouldn't happen (except maybe one for initialization).
o Fix disklabel, boot and driver inconsistencies with
bad144 in standard versions.
o Look at latest linux clustering methods. Our disksort()
gets in the way of clustering.
o cleaned up the ATA changes (needs more work. I think
the ATA specs say that the only thing really wrong with
the original version of wx is that there was no test
for drive-ready before some commands. 400 nsec delay
suffices for almost everything and 400 nsec delay is
usually "free").
enough tests to be considered more stable than current driver.
Lots of work by Bruce, David G., and Guido have gone into this version, and
more is to come in the future.
Support for multiple controllers is in, but doesn't work correctly with
different controllers (IDE AND MFM), but multiple alike controllers appears
to work.
Most of the stray interrupts problems should be fixed, although you will
get a couple 'extra interrupts' when disklabeling and on startup.
a binary link-kit. Make all non-optional options (pagers, procfs) standard,
and update LINT to reflect new symtab requirements.
NB: -Wtraditional will henceforth be forgotten. This editing pass was
primarily intended to detect any constructions where the old code might
have been relying on traditional C semantics or syntax. These were all
fixed, and the result of fixing some of them means that -Wall is now a
realistic possibility within a few weeks.
From: Geoff Rehmet <g89r4222@braae.ru.ac.za>
Description:
On bootup, probe of wd drives fails (CP30104), and kernel panics
- cannot mount root
It appears that the device probe just times out.
Increasing the timeout back to its old value fixes the problem.
Repeat-By:
SUP FreBSD-current, Find a CP30104 ..... (ok ok ok)
Basically - Soren's changes barf my disk.
---
From: sos@login.dkuug.dk (S|ren Schmidt)
Subject: IDE-disk hangs - solution/patches NetBSD/FreeBSD
Summary: fixes for lost interrupts with IDE disks
Keywords: hanging-disk, IDE-disk, lost-interrupt
Due to "popular" demand I'm posting these patches to NetBSD/FreeBSD
instead of mailing them around the world :-)
As many have found out there is a problem when using IDE disks on
FreeBSD. Following is a patch that fixes the problem with lost intterrupts.
Both fixes is based on a patch posted here some month ago by
Stefan Behrens?? (sorry I've lost the original article). But anyway it
works (for me :-).
Basically it does a timeout on lost interrupts, starting the operation
again and logging and error message on the console.
It additionally makes the allready present while loop timeouts
independent of CPU speed, and adds minor numbers for easy access to
dos partitions.
Date: Wed, 29 Sep 1993 01:54:53 +0300
To bring this error try to make two swap partitons on one disk:
one of the partitions will be not recognized.
Fix is simple: set uninitialized val variable.
From: bde@kralizec.zeta.org.au (Bruce Evans)
This fixes several problems.
It has almost everything that is in the FreeBSD version of Aug 22.
It is missing the bug for 2 drives and still prints <> around the
drive type. It handles BADEND144 less verbosely. It does wdgetctlr()
somewhat differently from NetBSD/FreeBSD.
Date: Sun Sep 5 06:45:12 PDT 1993
From: rgrimes@cdrom.com
Fixed printf's to be correct, since Bruce used the old ones. This driver
still prints phantom wd1's on some Maxtor and other IDE drives, I have
a patch I am sending to Bruce for checking.
I submitted the part of patch00155 that fixes wd.c not reporting any
bad blocks. Unfortunately, the patch created a new problem that makes new
installations using that kernel impossible. I have included a patch below that
should fix both problems. The fix comes from Tom Ivar Helbekkmo's wd driver
(the Norway wd driver). I've also eliminated the use of the DKFL_QUIET flag
completely, since it is not used anymore.
Fixed wdgetctrl routines for so that it returns a meaniful string for
non IDE disk drives. It also nolonger returns success when a drive is
not really there.
way of doing things. There still remain several drivers that need to
be updated. Also added a compile-time option to pccons to switch the
control and caps-lock keys (REVERSE_CAPS_CTRL) - added for my personal
sanity.
