Commit Graph

160313 Commits

Author SHA1 Message Date
Marius Strobl
62cf53e2ea - Move the macros for generating load and store instructions to asmacros.h
so they can be shared by different source files and extend them by a
  variant for atomic compare and swap.
- Consistently use EMPTY.
2010-12-29 14:14:50 +00:00
Marius Strobl
b5b0068b4b Rename the "xor" parameter to "xorval" as the former is a reserved keyword
in C++.

Submitted by:	gahr
2010-12-29 14:11:46 +00:00
Konstantin Belousov
3280870dca Move the increment of vm object generation count into
vm_object_set_writeable_dirty().

Fix an issue where restart of the scan in vm_object_page_clean() did
not removed write permissions for newly added pages or, if the mapping
for some already scanned page changed to writeable due to fault.
Merge the two loops in vm_object_page_clean(), doing the remove of
write permission and cleaning in the same loop. The restart of the
loop then correctly downgrade writeable mappings.

Fix an issue where a second caller to msync() might actually return
before the first caller had actually completed flushing the
pages. Clear the OBJ_MIGHTBEDIRTY flag after the cleaning loop, not
before.

Calls to pmap_is_modified() are not needed after pmap_remove_write()
there.

Proposed, reviewed and tested by:	alc
MFC after:	1 week
2010-12-29 12:53:53 +00:00
Konstantin Belousov
a738d4cf20 Add support for FS_TRIM to user-mode UFS utilities.
Reviewed by:	mckusick, pjd, pho
Tested by:	pho
MFC after:	1 month
2010-12-29 12:31:18 +00:00
Konstantin Belousov
8c2a54de80 Add kernel side support for BIO_DELETE/TRIM on UFS.
The FS_TRIM fs flag indicates that administrator requested issuing of
TRIM commands for the volume. UFS will only send the command to disk
if the disk reports GEOM::candelete attribute.

Since disk queue is reordered, data block is marked as free in the bitmap
only after TRIM command completed. Due to need to sleep waiting for
i/o to finish, TRIM bio_done routine schedules taskqueue to set the
bitmap bit.

Based on the patch by:	mckusick
Reviewed by:	mckusick, pjd
Tested by:	pho
MFC after:	1 month
2010-12-29 12:25:28 +00:00
Konstantin Belousov
d2d6c59245 Move the definition of mkdirlisthd from header to C file.
Reviewed by:	mckusick
Tested by:	pho
2010-12-29 12:16:06 +00:00
Konstantin Belousov
d91e813c7b Add reporting of GEOM::candelete BIO_GETATTR for md(4) and geom_disk(4).
Non-zero value of attribute means that device supports BIO_DELETE.

Suggested and reviewed by:	pjd
Tested by:	pho
MFC after:	1 week
2010-12-29 12:11:07 +00:00
Konstantin Belousov
c44d423ed8 Add sysctl vm.md_malloc_wait, non-zero value of which switches malloc-backed
md(4) to using M_WAITOK malloc calls.

M_NOWAITOK allocations may fail when enough memory could be freed, but not
immediately. E.g. SU UFS becomes quite unhappy when metadata write return
error, that would happen for failed malloc() call.

Reported and tested by:	pho
MFC after:	1 week
2010-12-29 11:39:15 +00:00
Konstantin Belousov
abf6c181e4 Use a proper type for the variable holding the summary size of the inode
data. Otherwise, on 32bit systems, unlinked inode which size is the
multiple of 4GB was not truncated, causing corruption.

Reported by:	brucec
Reviewed by:	mckusick
Tested by:	pho
2010-12-29 11:19:39 +00:00
David Xu
c8e368a933 - Follow r216313, the sched_unlend_user_prio is no longer needed, always
use sched_lend_user_prio to set lent priority.
- Improve pthread priority-inherit mutex, when a contender's priority is
  lowered, repropagete priorities, this may cause mutex owner's priority
  to be lowerd, in old code, mutex owner's priority is rise-only.
2010-12-29 09:26:46 +00:00
Colin Percival
eb68ccd676 A lack of console input is not the same thing as a byte of \0 input.
Correctly return -1 from cngetc when no input is available to be read.

This fixes the '(CTRL-C to abort)' spam while dumping.

MFC after:	3 days
2010-12-29 05:13:21 +00:00
Rick Macklem
bd2fa726e0 Delete the nfsvno_localconflict() function in the experimental
NFS server since it is no longer used and is broken.

MFC after:	2 weeks
2010-12-28 23:50:13 +00:00
Warner Losh
6e6abcfd24 MIPS has lots of flavors as well 2010-12-28 22:49:28 +00:00
Warner Losh
714cf6c0df Revert r216777, per jhb@ 2010-12-28 22:45:29 +00:00
Warner Losh
e83e229d01 Revert r216775, per jhb@ 2010-12-28 22:44:32 +00:00
Nathan Whitehorn
071a51cf97 Fix an error in the ABI in rtld_bind_start(). When passing arguments to a
C function, the caller's stack frame must have room to store all of the
arguments to that function. While here, fix stack frame alignment issues.

Without this change, the compiler will save r3 and r4 into the caller's
stack frame before calling setjmp() in _rtld_bind(). These would then
overwrite arguments to the newly-bound function, causing eventual failures.
2010-12-28 22:31:59 +00:00
Jilles Tjoelker
acd7984f96 sh: Don't do optimized command substitution if expansions have side effects.
Before considering to execute a command substitution in the same process,
check if any of the expansions may have a side effect; if so, execute it in
a new process just like happens if it is not a single simple command.

Although the check happens at run time, it is a static check that does not
depend on current state. It is triggered by:
- expanding $! (which may cause the job to be remembered)
- ${var=value} default value assignment
- assignment operators in arithmetic
- parameter substitutions in arithmetic except ${#param}, $$, $# and $?
- command substitutions in arithmetic

This means that $((v+1)) does not prevent optimized command substitution,
whereas $(($v+1)) does, because $v might expand to something containing
assignment operators.

Scripts should not depend on these exact details for correctness. It is also
imaginable to have the shell fork if and when a side effect is encountered
or to create a new temporary namespace for variables.

Due to the $! change, the construct $(jobs $!) no longer works. The value of
$! should be stored in a variable outside command substitution first.
2010-12-28 21:27:08 +00:00
Warner Losh
1977f3f168 Comment out npx and isa from NOTES file. We don't need them here
since DEFAULTS already pulls them in.
2010-12-28 21:22:08 +00:00
Warner Losh
78b92d19e0 Remove mem, io, isa and npx since they are duplicative of the entries
in DEFAULTS.  Saves 8 lines of warnings when we build XBOX.
2010-12-28 21:20:58 +00:00
Warner Losh
092a687dc6 Due to the automatic inclusion of DEFAULTS everywhere, and since it
has device mem in it almost everywhere, we get warnings about
duplicated device almost everywhere.  Comment it out, with a note
about why, so that we don't get those warnings.
2010-12-28 21:18:58 +00:00
Pawel Jakub Dawidek
8449945a4d ZFS might not return monotonically increasing directory offset cookies,
so turn off UFS-specific hack that assumes so in ZFS case.
Before the change we can miss returning some directory entries to a
NFS client.

I believe that the hack should be moved to ufs_readdir(), but until we find
somebody who will do it, turn it off for ZFS in NFS server code.

Submitted by:	rmacklem
Discussed with:	rmacklem, mckusick
MFC after:	3 days
2010-12-28 21:12:15 +00:00
Juli Mallett
1dadcedcfc When allocating memory from bootmem for the kernel to use, try to leave about
2MB of memory in the bootmem allocator for the SDK to use internally at a later
point.  It'd be nice if there were some functions we could call before
allocating memory to let various facilities reserve some memory, but for now
this seems sufficient.  Previously some unfortunate systems could give up all
(or at least most) of their memory to the kernel from bootmem, and then
allocating command queues for packet output and the like would fail later in
the boot process (which in turn would lead to crashes even later.)

Reported by:	kan
2010-12-28 20:11:54 +00:00
Alan Cox
a5dbab5444 Correct a typo in vm_fault_quick_hold_pages().
Reported by:	Bartosz Stec
2010-12-28 20:02:30 +00:00
John Baldwin
581499c3bf Start sentences on a new line to ease life for translators. Tweak the
wording in a few places.

MFC after:	1 week
2010-12-28 18:58:15 +00:00
Pyun YongHyeon
deb4ef8291 Add device id for RDC M3010 which is found on Vortex86 SoC.
Reviewed by:	mav
2010-12-28 17:45:43 +00:00
Nathan Whitehorn
52a190480f Only keep track of PTE validity statistics for pages not locked in the
table. The 'locked' attribute is used to circumvent the regular page table
locking for some special pages, with the result that including locked pages
here causes races when updating the stats.
2010-12-28 17:02:15 +00:00
John Baldwin
e58ed10207 Use bus_alloc_resource_any().
MFC after:	2 weeks
2010-12-28 16:57:29 +00:00
Jilles Tjoelker
f3c2011efb sh: Add test for optimized command substitution.
This test verifies that certain expansions without side effects do not
cause the command substitution to be executed in a child process.

This is not a correctness requirement, but it involves a nontrivial amount
of code and it would be unfortunate if it stopped working.
2010-12-28 14:58:08 +00:00
Colin Percival
4a416f8375 Remove a "not strictly correct" (and panic-inducing) workaround for a bug
which doesn't seem to exist.

PR:		kern/141328
MFC after:	3 days
2010-12-28 14:36:32 +00:00
Jilles Tjoelker
45b71cd16e sh: Make expansion errors in optimized command substitution non-fatal.
Command substitutions consisting of a single simple command are executed in
the main shell process but this should be invisible apart from performance
and very few exceptions such as $(trap).
2010-12-28 13:28:24 +00:00
Lawrence Stewart
e29f3cc76d Add a comment for the ccv member of struct tcpcb.
Sponsored by:	FreeBSD Foundation
MFC after:	5 weeks
X-MFC with:	r215166
2010-12-28 12:37:57 +00:00
Lawrence Stewart
39bc9de532 - Add some helper hook points to the TCP stack. The hooks allow Khelp modules to
access inbound/outbound events and associated data for established TCP
  connections. The hooks only run if at least one hook function is registered
  for the hook point, ensuring the impact on the stack is effectively nil when
  no TCP Khelp modules are loaded. struct tcp_hhook_data is passed as contextual
  data to any registered Khelp module hook functions.

- Add an OSD (Object Specific Data) pointer to struct tcpcb to allow Khelp
  modules to associate per-connection data with the TCP control block.

- Bump __FreeBSD_version and add a note to UPDATING regarding to ABI changes
  introduced by this commit and r216753.

In collaboration with:	David Hayes <dahayes at swin edu au> and
				Grenville Armitage <garmitage at swin edu au>
Sponsored by:	FreeBSD Foundation
Reviewed by:	bz, others along the way
MFC after:	3 months
2010-12-28 12:13:30 +00:00
Ulrich Spörlein
20a95cd6fc Revert most of r210764, now that mdocml does the right
thing with empty quotation macros.

Requested by:	Alex Kozlov
2010-12-28 10:08:50 +00:00
Andrey V. Elsukov
f25481193e Allow destroying EBR in COMPAT (default) mode.
MFC after:	2 week
2010-12-28 08:42:12 +00:00
Andrey V. Elsukov
d3507dff37 Make EBR probe method less strictly to be able detect EBRs with
small non fatal inconsistency. EBR may contain boot loader and sometimes
it just has some garbage data. Now this does not prevent FreeBSD to use
extended partitions. But since we do not support bootcode for EBR we mark
tables which have non empty boot area as corrupt. This does make them
readonly and we can not damage this data.

PR:		kern/141235
MFC after:	1 month
2010-12-28 08:36:44 +00:00
Lawrence Stewart
bee9ab2bc5 Add a new sack hint to track the most recent and highest sacked sequence number.
This will be used by the incoming Enhanced RTT Khelp module.

Sponsored by:	FreeBSD Foundation
Submitted by:	David Hayes <dahayes at swin edu au>
Reviewed by:	bz and others (as part of a larger patch)
MFC after:	3 months
2010-12-28 03:27:20 +00:00
Lawrence Stewart
22968a7d56 Fix a whitespace nit introduced in r215166.
Sponsored by:	FreeBSD Foundation
Spotted by:	bz
MFC after:	5 weeks
X-MFC with:	r215166
2010-12-28 01:38:52 +00:00
Colin Percival
76c9650713 Build the modules which can be built. The excluded modules fall into two
categories: Those which can't build with PAE because they attempt to cast
a pointer to a bus_addr_t (mostly scsi drivers); and those which can't be
built with XEN because they conflict with something in xen-os.h (e.g., in
cxgb there is a conflicting definition of test_and_clear_bit).

MFC after:	1 week
2010-12-27 23:59:27 +00:00
Jilles Tjoelker
a355eb9e1a sh: Add a testcase for cmdsubst errors that already works properly.
If a command substitution consists of one special builtin and there is a
redirection error, this should not abort the outer shell.
It was fixed in r201366 by ignoring special builtin properties for command
substitutions consisting of one builtin.
2010-12-27 23:56:03 +00:00
Colin Percival
2b3e1fb085 Make it possible to specify WITHOUT_MODULES in a kernel config file.
MFC after:	1 week
2010-12-27 23:52:40 +00:00
Doug Barton
be59eea018 Add pidfile [1]
While I'm here, don't run the sysctl frob unconditionally, and
s/sysctl/$SYSCTL/

PR:		conf/153460 [1]
Submitted by:	Grigory Rechistov <ggg_mail@inbox.ru>
2010-12-27 22:52:47 +00:00
Jilles Tjoelker
ff802dc7bb sh: Simplify "stack string" code slightly.
Maintain a pointer to the end of the stack string area instead of how much
space is left. This simplifies the macros in memalloc.h. The places where
the new variable must be updated are only where the memory area is created,
destroyed or resized.
2010-12-27 22:18:27 +00:00
Robert Watson
eab54f6a13 Remove comment bemoaning the lack of an INP_INHASHLIST above in_pcbdrop();
I fixed this in r189657 in early 2009, so the comment is OBE.

Reviewed by:	bz
MFC after:	3 days
2010-12-27 19:38:25 +00:00
Ed Maste
f8e809686a Restore two commented-out tests from plus-minus1.0 to a new file.
These two cases pass on -CURRENT but fail on stable/8.

Reviewed by:	jilles
2010-12-27 15:57:41 +00:00
Ed Schouten
88d5e71efe Fix style bug introduced in r216696.
Additional indentation caused the line to become longer than 80 columns.
2010-12-27 15:05:15 +00:00
Konstantin Belousov
7dbb59c7ce Teach ddb "show mount" about MNTK_SUJ flag. 2010-12-27 12:06:38 +00:00
Alan Cox
4de2261903 Move vm_object_print()'s prototype to the expected place. 2010-12-27 07:12:22 +00:00
Alexander Kabaev
43c9be3d24 Fix an apparent cop-and-paste mistake in previous commit.
This makes dlsym(RTLD_DEFAULT) work properly again.
2010-12-27 00:30:29 +00:00
Ed Maste
65db095da0 Remove commented-out test that's covered in plus-minus2.0 anyway.
Discussed with: jilles
2010-12-26 23:19:16 +00:00
Simon L. B. Nielsen
d97326d09b Fix deprecated warning about -L which said -i was deprecated.
MFC after:	3 days
2010-12-26 22:29:44 +00:00