The vm_map_insert()/vm_object_coalesce() optimization has been extended
to include OBJT_SWAP objects as well as OBJT_DEFAULT objects. This is
possible because it costs nothing to extend an OBJT_SWAP object with
the new swapper. We can't do this with the old swapper. The old swapper
used a linear array that would have had to have been reallocated, costing
time as well as a potential low-memory deadlock.
/dev/urandom takes about 38 seconds on a P5/133. It is useful
to be able to kill such reads almost immediately. Processes
doing such reads are now scheduled so their denial of service
is no worse than that of processes looping in user mode.
code when examining their fix, which caused my code (in rev 1.52) to:
- panic("soaccept: !NOFDREF")
- fatal trap 12, with tracebacks going thru soclose and soaccept
Drivers should be updated if they get flagged by this message.
(The reason this is important is because we do not have a way
to catch this mistake for interfaces added after ifinit() runs.)
in vm_map_simplify_entry. Basically, once you've verified that
the objects in the adjacent vm_map_entry's are the same, either
NULL or the same vm_object, there's no point in checking that the
objects have the same behavior.
Obtained from: Alan Cox <alc@cs.rice.edu>
Increase the overall length of the delay by 10.
Without this a 3C509 card on my MediaGX crash box can't be reliably
read. With this it is solid.
I've left a delay multiplier in instead of just changing the base
delay because I'm surprised I had to increase it so much and expect
there may be another problem.
Checked by: "Richard Seaman, Jr." <dick@tar.com>
Fix the following problem:
As the code stands now, growing any stack, and not just the process's
main stack, modifies vm->vm_ssize. This is inconsistent with the code
earlier in the same procedure.
can be hung.
Add a tunable delay at the beginning of the SHUTDOWN_FINAL at_shutdown
queue, allowing time to settle before we launch into the list of things
that are expected to turn the system off.
Fix a bug in at_shutdown_pri() where the second insertion always put
the item in second position in the queue.
Reviewed by: "D. Rock" <rock@cs.uni-sb.de>
Change microseq offsets. Previously, offsets of the program counter where
added to the index of the current microinstruction. Make them rely on the
index of the next executed microinstruction.
Suggested by: Luigi Rizzo <luigi@labinfo.iet.unipi.it>
Using suser() means that the p_acflag will (can) be set, to show that
a process used super-powers during execution. It also makes it easier
to restrict roots we don't trust later on.
Reviewed by: bde
the startup code. Implement a call to outer framework function so that
asynchronous events can be handled (e.g., speed negotiation, target mode).
Roll internal release tags.
cycle to get rid of the old 1.31 firmware. *@!$&^@&$!&^&^!!!!!
But anyway comment it out and use new SBus 7.55 firmware. We get fast posting
with this as well as 32 luns and target mode support.
(not that this is used yet in FreeBSD, but it's ready for FreeBSD-sparc
whenever it happens....)
to break existing software) acting as a pointer to emulator-specific
state data that some emulators may (or may not) need to maintain about
a socket.
Used by the svr4 module as a place for maintaining STREAMS emulation state.
Discussed with: Mike Smith, Garrett Wollman back in Sept 98
v_caddr_t with extreme prejudice. Here the bogons were originally
the same as for c_caddr_t (half-baked K&R support), but rev.1.95
changed one wrong cast and one harmless cast to 2 wrong casts,
and rev.1.96 only fixed the originally wrong cast.
is not implied by -Wall as claimed by gcc.1. Adding it causes a
measly 7193 new warnings for LINT, mostly for "unused parameter" and
"comparison between signed and unsigned".
terminating c_caddr_t with extreme prejudice. Here we depended
on the "opaque" type c_caddr_t being precisely `const char *'
to do unportable pointer arithmetic.
c_caddr_t with extreme prejudice. Here the original casts to
caddr_t were to support K&R compilers (or missing prototypes),
but the relevant source files require an ANSI compiler.
problem and solution is outlined in the comments, but basically
we needed a way to allow the SYSINIT mechanism to handle const void *
arguments and function pointers as well as non-const arguments and
function pointers while still maintaining the compiler's ability to
issue warnings if you try to use a bad combination.
c_caddr_t with extreme prejudice. Here the point of the original
cast to caddr_t was to break the warning about the const mismatch
between write(2)'s `const void *buf' and `struct uio's `char
*iov_base' (previous bitrot gave a gratuitous dependency on caddr_t
being char *). Compiling with -Wcast-qual made the cast a full
no-op.
This change has no effect on the warning for discarding `const'
on assignment to iov_base. The warning should not be fixed by
splitting `struct iovec' into a non-const version for read()
and a const version for write(), since correct const poisoning
would affect all pointers to i/o addresses. Const'ness should
probably be forgotten by not declaring it in syscalls.master.
c_caddr_t with extreme prejudice. Here we want to convert from
`const char *' to `const char *'. Casting through c_caddr_t is
not the way to do this. The original cast to caddr_t was apparently
to break warnings about const mismatches in other versions of BSD
(in 4.4BSDLite2, the conversion is from `const char *path' to
plain caddr_t).
Add C_DECLARE_MODULE - same as DECLARE_MODULE but uses C_SYSINIT
instead of SYSINIT.
The C_ items are going to be used for items passing const data to
sysinit.
the interrupt which will be given to the PCIC. If the value supplied is
illegal or not available, interrupts will be turned off and polled mode
used instead.
apparently in accordance with style(9).
Complained-about-by: bde
vinumopen: Change check for root user to a call to suser(9)
vinumclose: Remove check for root user.
Nitpicked-by: phk
Auto Detection Mode. This leaves MSP3400C owners still unsupported.
Thanks to Gerd Knorr <kraxel@cs.tu-berlin.de> for providing some early
assistance and sample code in the linux bttv driver.
Nicolas Souchu <nsouch@freebsd.org> ported the msp_read/write/reset
functions to smbus/iicbus.
METEOR_INPUT_DEV2 now selects a composite camera on the SVIDEO port.
For true SVIDEO, use METEOR_INPUT_DEV_SVIDEO.
If you get a monochrome image from the SVIDEO port, you have
seleted the wrong input type.
Tested by: Johan Larsson<gozer@ludd.luth.se>
version and a const void * version. Currently the const void * version
simply calls the void * version ( i.e. no 'fix' is in place ).
A solution needs to be found for the C_SYSINIT ( etc...) family of
macros that allows const void * without generating a warning, but
does not allow non-const void *.
Sun implemented iBCS2 compatibility on Solaris >= 2.6: The emulator
runs in user-mode, patching the LDT so that client programs making
syscalls through the old iBCS2 call gate get handled by the emulator
process. Unemulated syscalls therefore need their own call-gate that
bypasses the emulator. Sun chose LDT entry 4 to implement this, which
is what we've been using as LUDATA_SEL, so we need to change LUDATA_SEL
if we want to run Solaris executables.
Discussed with: Mike Smith
keyboard.
- Translate some keycode for the 84 keyboard so that the 84 keyboard
and the 101 keyboard become more compatible in terms of keycodes.
- Updated the built-in keymaps so that it is in line with the recent
changes in share/syscons/keymaps.
- Added some comment on the Pause/Break key on the 101 keyboard.
vinum_scandisk: check not only drive error, but also drive state,
before accessing the drive.
drivecmp: Remove warning messages by Backing out overly constant
declarations in revision 1.9.
also a bit of a BDE patch in there I beleive. Backs out a fix I needed for Cyrix support
early on but it turns out that a later fix in the cyrix support made it un-needed.
address, account for cards which report the Texas Instruments PCI vendor ID
in addition to Compaq and Olicom. (I don't actually have a card that
reports the TI vendor/device ID, but it appears that some Racore adapters
work this way, and failing to account for it when we have the ID listed
in the supported devices list is a bug.)
This changes the definitions of a few items so that structures are the
same whether or not the option itself is enabled. This allows
people to enable and disable the option without recompilng the world.
As the author says:
|I ran into a problem pulling out the VM_STACK option. I was aware of this
|when I first did the work, but then forgot about it. The VM_STACK stuff
|has some code changes in the i386 branch. There need to be corresponding
|changes in the alpha branch before it can come out completely.
what is done:
|
|1) Pull the VM_STACK option out of the header files it appears in. This
|really shouldn't affect anything that executes with or without the rest
|of the VM_STACK patches. The vm_map_entry will then always have one
|extra element (avail_ssize). It just won't be used if the VM_STACK
|option is not turned on.
|
|I've also pulled the option out of vm_map.c. This shouldn't harm anything,
|since the routines that are enabled as a result are not called unless
|the VM_STACK option is enabled elsewhere.
|
|2) Add what appears to be appropriate code the the alpha branch, still
|protected behind the VM_STACK switch. I don't have an alpha machine,
|so we would need to get some testers with alpha machines to try it out.
|
|Once there is some testing, we can consider making the change permanent
|for both i386 and alpha.
|
[..]
|
|Once the alpha code is adequately tested, we can pull VM_STACK out
|everywhere.
|
Submitted by: "Richard Seaman, Jr." <dick@tar.com>
This takes the conditionals out of the code that has been tested by
various people for a while.
ps and friends (libkvm) will need a recompile as some proc structure
changes are made.
Submitted by: "Richard Seaman, Jr." <dick@tar.com>
directory containing rc.conf.local and rc.local, and possibly other
things in the future.
This sysctl is used by the diskless startup code and new rc.conf. If
it cannot be found or is empty, the system should revert to using /etc.
where select(2) can return that a listening socket has a connected socket
queued, the connection is broken, and the user calls accept(2), which then
blocks because there are no connections queued.
Reviewed by: wollman
Obtained from: NetBSD
(ftp://ftp.NetBSD.ORG/pub/NetBSD/misc/security/patches/19990120-accept)
bootinfo structure where bi_esymtab < bi_symtab was being passed
to the kernel. In the case of older 2.x kernels, this was causing
garbage to be printed to the video console, followed by an exception.
This should resolve a problem reported on -current by Peter Jeremy
<peter.jeremy@auss2.alcatel.com.au>.
iicbus(4) and smb(4).
User programs are available to retrieve SDRAM and sensor info, contact
the author.
Submitted by: Takanori Watanabe <takawata@shidahara1.planet.sci.kobe-u.ac.jp>
Reviewed by: Mike Smith <msmith@freebsd.org>
buggy for fifos, and no one seems to have investigated its behaviour
on other types of files. It has been broken since the Lite2 merge
in rev.1.54.
Nagged about by: Brian Feldman (green@unixhelp.org)
I added a FICL_TRACE-conditioned trace facility based on "see".
It is ugly because words' functions are almost all static, and ficlExec,
where the trace has to be located, can't get their pointers. So, #ifdef
this staticization, and add most of see's body into ficlExec. Duplication
of code, uglyness, etc. But it is cleanly #ifdef'ed, and works like a
charm.
It does not provide "step" facility, though, just trace. It is
tunable at run-time through "trace!". If anyone (most likely me :) ever
wants a step facility, I'll add it. Should be easy.
PR: bin/9652
Submitted by: "Daniel C. Sobral" <dcs@newsguy.com>
vm_page_rename(), but never pulled the page off PQ_CACHE if it was on
PQ_CACHE. Dirty pages in PQ_CACHE are not allowed and a KASSERT was
added in -4.x to test for this... and got hit.
In -4.x, vm_page_rename() automatically dirties the page. This commit
also has it deal with the PQ_CACHE case, deactivating the page in that
case.
FICL's TYPE copies the counted string to HERE, as abial has
remarked. Answering to abial's question, this is NOT garanteed to have
enough space.
...
We have dynamic memory. Even before memory-alloc got in, we
already had dynamic memory. Use it, then! (ficlMalloc is sysdep, so I
suppose that's why it was not used for TYPE; ficl is probably designed
to work without a working ficlFree).
Submitted by: "Daniel C. Sobral" <dcs@newsguy.com>
values. The 'int' return value for the procedure was never used and
not well defined in any case when there are mixed errors on pages, so
it has been removed. vm_pager_put_pages() and associated vm_pager
functions now return void.
Implement a new variable 'root_disk_unit' which supersedes
'num_ide_disks' and makes it possible to explicitly set the
root device unit number regardless of type considerations.
bootinfo.c
If we can't calculate a dev_t for the root disk, complain and
don't proceed to boot with an invalid boot device.
patch. lf can't be dereferenced after the unload attempt, in case it
was freed. Instead, decrement first and back it out if the unload failed.
This should be relatively immune to races caused by the user since the
userref count will be zero for the duration of the actual unloading and
will stop further kldunload attempts.
Submitted by: Ustimenko Semen <semen@iclub.nsu.ru>
Make TIB handling use buffer size to conform with ANS Forth.
Add ANS MEMORY-ALLOC word set.
See the PRs for extensive details.
PR: kern/9412 kern/9442 kern/9514
Submitted by: PRs from Daniel Sobral <dcs@newsguy.com>
help.common
interp.c
Rename the 'source' command to 'include' in order to avoid conflict
with the ANS Forth command of the same name. (kern/9473)
interp_forth.c:
Changes from kern/9412 (EXCEPTION word), kern/9442 (TIB buffer
sizing) and an improved version of kern/9460 (set
version numbers).
load_aout.c:
Trim some obsolete #if 0'ed cruft.
pnp.c:
Tidy the pnpscan output, turn off the module scanning until we
sort out how to do it right.
PR: kern/9412 kern/9442 kern/9460 kern/9473
Submitted by: PRs from Daniel Sobral <dcs@newsguy.com>
of the CRC as the multicast hash table bit, not the lower six bits. Plus
we have to flip on all bits in the table for multicast mode.
Pointed out by: Kazushi SUGYO <k-sugyou@nwsl.mesh.ad.jp>
turns out to not be useful to unwind the dependencies and continue in
the face of a fatal error.
Also changed the log() to a printf() in softdep_error() so that it will
be output in the case of a impending panic.
Submitted by: Kirk McKusick <mckusick@mckusick.com>
the buffer as still being dirty. This isn't a perfect solution, but
throwing away the buffer contents will often result in filesystem
corruption and this solution will at least correctly deal with transient
errors.
Submitted by: Kirk McKusick <mckusick@mckusick.com>
swap blocks are now in PAGE_SIZE'd increments instead of DEV_BSIZE'd
increments. We still convert to DEV_BSIZE'd increments for the
backing store I/O, but everything else is in PAGE_SIZE increments.
vm_pager.h
Added argument to getpbuf() and relpbuf() to allow each subsystem to
specify a different hard limit on the number of simultanious physical
bufferes that said subsystem may allocate. Without this feature, one
subsystem ( e.g. the vfs clustering code ) could hog *ALL* the pbufs,
causing a deadlock in the pager in a low memory situation.
Same for trypbuf().
Removed call to vm_object_collapse(), which can block. This was being
called without the pageout code holding any sort of reference on the
vm_object or vm_page_t structures being manipulated. Since this code
can block, it was possible for other kernel code to shred the state
the pageout code was assuming remained intact.
Fixed potential blocking condition in vm_pageout_page_free() ( which
could cause a deadlock in a low-memory situation ).
Currently there is a hack in-place to deal with clean filesystem meta-data
polluting the inactive page queue. John doesn't like the hack, and neither
do I.
Revamped and commented a portion of the pageout loop.
Added protection against potential memory deadlocks with OBJT_VNODE
when using VOP_ISLOCKED(). The problem is that vp->v_data can be NULL
which causes VOP_ISLOCKED() to return a less informed answer.
remove vm_pager_sync() -- none of the pagers use it any more ( the old
swapper used to. The new one does not ).
reducing the size of vm_page_t.
SWAPBLK_NONE and SWAPBLK_MASK are defined here. These actually are
more generalized then their names imply, but their placement is somewhat
of a legacy issue from a prior test version of this code that put
the swapblk in the vm_page_t structure. That test code was eventually
thrown away. The legacy remains.
Added vm_page_flash() inline. Similar to vm_page_wakeup() except that
it does not clear PG_BUSY ( one assumes that PG_BUSY is already clear ).
Used by a number of routines to wakeup waiters.
Collapsed some of the code in inline calls to make other inline calls.
GCC will optimize this well and it reduces duplication.
vm_page_free() and vm_page_free_zero() inlines added to convert to
the proper vm_page_free_toq() call.
vm_page_sleep_busy() inline added, replacing vm_page_sleep() ( which has
been removed ). This implements a much more optimizable page-waiting
function.
pointers per entry ). The table has been changed to a singly linked
list of vm_page_t pointers. The table has been doubled in size, but
the entries only take half the space so a net-zero change in memory use.
The hash function has been changed, hopefully for the better. The
combination of the larger hash table size of changed function should
keep the chain length down to a reasonable number (0-3, average 1).
vm_object->page_hint has been removed. This 'optimization' was not
only never needed, but costs as much as a hash chain link to implement.
While having page_hint in vm_object might result in better locality
of reference, the cost is not worth the space in vm_object or the
extra instructions in my view.
vm_page_alloc*() functions have been inlined and call a generalized
non-inlined vm_page_alloc_toq() which combines the standard alloc
and zero-page alloc functions together, reducing code size and the L1
cache footprint. Some reordering has been done... not much. The
delinking code should be faster ( because unlinking a doubly-linked list
requires four memory ops and unlinking a singly linked list only requires
two ), and we get a hash consistancy check for free.
vm_page_rename() now automatically sets the page's dirty bits.
vm_page_alloc() does not try to manually inline freeing a cache page.
Instead, it now properly calls vm_page_free(m) ... vm_page_free() is
really too complex to manually inline.
vm_await(), supporting asleep(), has been added.
of most of the swap-pager-specific fields, the removal of the id,
and the removal of paging_offset.
A new inline, vm_object_pip_wakeupn() has been added to subtract an
arbitrary number n from the paging_in_progress count and then wakeup
waiters as necessary. n may be 0, resulting in a 'flash'.
object->paging_offset has been removed - it was used to optimize a
single OBJT_SWAP collapse case yet introduced massive confusion throughout
vm_object.c. The optimization was inconsequential except for the
claim that it didn't have to allocate any memory. The optimization
has been removed.
madvise() has been fixed. The old madvise() could be made to operate
on shared objects which is a big no-no. The new one is much more careful
in what it modifies. MADV_FREE was totally broken and has now been fixed.
vm_page_rename() now automatically dirties a page, so explicit dirtying
of the page prior to calling vm_page_rename() has been removed.
about conversions of objects to OBJT_SWAP, it is done automatically
now.
Replaced manually inserted code with inline calls for busy waiting on
pages, which also incidently fixes a potential PG_BUSY race due to
the code not running at splvm().
vm_objects no longer have a paging_offset field ( see vm/vm_object.c )
instead to properly handle any waiters.
Added comments, added support for M_ASLEEP. Generally treat M_ flags
as flags instead of constants to compare against.
and the swap_pager has been completely replaced.
The new swap pager uses the new blist radix-tree based bitmap allocator
for low level swap allocation and deallocation. The new allocator
is effectively O(5) while the old one was O(N), and the new allocator
allocates all required memory at init time rather then at allocate
memory on the fly at run time.
Swap metadata is allocated in clusters and stored in a hash table,
eliminating linearly allocated structures.
Many, many features have been rewritten or added. Swap space is now
reallocated on the fly providing a poor-mans auto defragmentation of
swap space. Swap space that is no longer needed is freed on a timely
basis so no garbage collection is necessary.
Swap I/O is marked B_ASYNC and NFS has been fixed to do the right
thing with it, so NFS-based paging now has around 10x the performance
as it did before ( previously NFS enforced synchronous I/O for paging ).
