Dimitry Andric [Wed, 28 Jan 2015 07:29:38 +0000 (07:29 +0000)]
Disable the new -Wunused-local-typedef warning for WARNS <= 3, since it
triggers way too many times for the version of libc++ we have in base at
this point. While here, fix the compiler version check for
-Wno-unused-const-variable.
Dimitry Andric [Tue, 27 Jan 2015 19:58:02 +0000 (19:58 +0000)]
Instead of hardcoding /usr/lib, as in r277803, use ${LIBDIR} for the
private header location, since this Makefile (and everything under
lib/clang) is not processed for the 32-bit compat stages anyway.
Dimitry Andric [Tue, 27 Jan 2015 19:25:39 +0000 (19:25 +0000)]
Change the path to clang's private headers. Upstream has always stored
these in $LIBDIR/clang/$VERSION/include, instead of our previous custom
location in /usr/include/clang/$VERSION. This allows us to drop yet
another FreeBSD-specific patch.
Randall Stewart [Tue, 27 Jan 2015 18:56:22 +0000 (18:56 +0000)]
Fix yet another coverty warning (missing io is NULL check) and in examining that
warning I see yet another issue where we should be pclosing the io in the event
of the error and its a command (not fclose only).
Stefan Eßer [Tue, 27 Jan 2015 18:04:41 +0000 (18:04 +0000)]
Fix overflow check for multiplication:
- Add special test to detect the case of -1 * INTMAX_MIN
- Protect against elimination of the test division by the optimizer
Garrett Cooper noticed that the overflow checks were incomplete, and Bruce
Evans suggested the use of the "volatile" qualifier to counter the effect
of the undefined behaviour, when the prior multiplication caused overflow,
and he also suggested improvements to the comments.
key_spdget uses key_setdumpsp() without SPTREE_RLOCK held (it uses
referenced pointer to sp). Remove SPTREE_RLOCK_ASSERT from
key_setdumpsp() to fix wrong assertion.
Andriy Gapon [Tue, 27 Jan 2015 17:33:18 +0000 (17:33 +0000)]
hook userland threads suspend + resume into acpi suspend code
Also, split power_suspend into power_suspend and power_suspend_early.
power_suspend_early is called before the userland is frozen.
power_suspend is called after the userland is frozen.
Currently only VT switching is hooked to power_suspend_early.
This is needed because switching away from X server requires its
cooperation, so obviously X server must not be frozen when that happens.
Freezing userland during ACPI suspend is useful because not all drivers
correctly handle suspension concurrent with other activity. This is
especially applicable to drivers ported from other operating systems
that suspend all software activity between placing drivers and hardware
into suspended state.
In particular drm2/radeon (radeonkms) depends on the described
procedure. The driver does not have any internal synchronization
between suspension activities and processing of userland requests.
Many thanks to kib for the code that allows to freeze and thaw all
userland threads.
Note that ideally we also need to park / inhibit (non-special) kernel
threads as well to ensure that they do not call into drivers.
Andriy Gapon [Tue, 27 Jan 2015 15:28:46 +0000 (15:28 +0000)]
vt(4): Use power_{suspend,resume} event handlers to implement
suspend/resume
The goal is to avoid that the vt(4) resume happens before the video
display is resumed. The original patch was provided by Andriy Gapon.
This new patch registers the handlers in vt_upgrade(). This is done
once, thanks to the VDF_ASYNC flag. I abused this flag because it was
already abused by the keyboard allocation. The event handlers then call
the backend if it provides callbacks for suspend/resume.
The sys_quotactl() contract demands that the mount point is
vfs_unbusy()ed when the cmd is Q_QUOTAON, regardless of other input
parameters or error return.
Nathan Whitehorn [Tue, 27 Jan 2015 07:20:00 +0000 (07:20 +0000)]
Fix bug in mapppings of multiple pages exposed by updates to the VSCSI
support in QEMU. Each page of a many page mapping was getting mapped to
the same physical address, which is not the desired behavior.
Bryan Venteicher [Tue, 27 Jan 2015 05:34:46 +0000 (05:34 +0000)]
Rework vtblk dump handling of in flight requests
Previously, the driver resets the device and abandon the requests that
are caught in flight when the dump was initiated. This was problematic
if the system is resumed after the dump is completed.
While that is probably not the typical action, it is simple to rework
the driver to very likely have the device usable after the dump without
making it more likely for the dump to fail. The in flight requests are
simply queued for completion once the dump is finished.
Pedro F. Giffuni [Tue, 27 Jan 2015 01:45:47 +0000 (01:45 +0000)]
MFV r277782:
Merge some cherry-picked fixes originating in OpenBSD
Check whether the version field is available before looking at it.
While we're at it, use ND_TCHECK(), rather than a hand-rolled check, to
check whether we have the full fixed-length portion of the IPv4 header.
Pedro F. Giffuni [Tue, 27 Jan 2015 01:39:42 +0000 (01:39 +0000)]
Merge some cherry-picked fixes originating in OpenBSD
Check whether the version field is available before looking at it.
While we're at it, use ND_TCHECK(), rather than a hand-rolled check, to
check whether we have the full fixed-length portion of the IPv4 header.
Dimitry Andric [Mon, 26 Jan 2015 21:19:24 +0000 (21:19 +0000)]
Pull in r227062 from upstream clang trunk (by Renato Golin):
Allows Clang to use LLVM's fixes-x18 option
This patch allows clang to have llvm reserve the x18
platform register on AArch64. FreeBSD will use this in the kernel for
per-cpu data but has no need to reserve this register in userland so
will need this flag to reserve it.
This uses llvm r226664 to allow this register to be reserved.
uid and gid are never and should never be negative. The pw(8) manpage clearly
states the -u and -g arguments are for uids/gids, hence using negative values is
abusing a bug in former versions of pw(8)
John Baldwin [Mon, 26 Jan 2015 16:29:14 +0000 (16:29 +0000)]
- Update a disabled KASSERT() to use sbused() instead of accessing
the no-longer existant sb_cc sockbuf member.
- Use sbavail() instead of sbused() in t4_soreceive_ddp() to match the
usage in soreceive_stream() on which it is based.
John Baldwin [Mon, 26 Jan 2015 16:26:28 +0000 (16:26 +0000)]
Fix a couple of panics when detaching from a cxgbe/cxl interface that was
never brought up:
- Allow NULL to be passed to sglist_free().
- Don't try to stop an interface that was never fully initialized.
Ensure that _tmppt KVA is used exclusively by providing exclusive sx
lock around the mapping and uiomove(). Before r277643, it was
partially protected by Giant (but potential sleeping in fault from
uiomove() would still allow other thread to reuse the mapping).
Noted by: ian
Reviewed by: alc, ian
Sponsored by: The FreeBSD Foundation
MFC after: 3 weeks
Roger Pau Monné [Mon, 26 Jan 2015 08:42:47 +0000 (08:42 +0000)]
amd64: allow base memory segment to start at address different than 0
Current code requires that the first physical memory segment starts at 0,
but this is not really needed. We only need to make sure the bootstrap code
and page tables for APs are allocated below 4GB.
This patch removes this requirement and allows booting a Dell R710 from
UEFI, where the first physical memory segment starts at 0x10000.
- Increase default i2c bus timeout to 5 seconds from 1 second. Sometimes
1 second is not enugh for TDA19988 HDMI framer (e.g. on Beaglebone Black)
- Add per-device i2c_timout sysctl (dev.iichb.X.i2c_timeout) to control
I2C bus timeout manually
- Pass softc instead of device_t to all sysctl handlers
John Baldwin [Sun, 25 Jan 2015 20:37:32 +0000 (20:37 +0000)]
natd(8) will work with an unconfigured interface and effectively not do
anything until the interface is assigned an address. This fixes
ipfw_nat to do the same by using an IP of INADDR_ANY instead of
aborting the nat setup if the requested interface is not yet configured.
John Baldwin [Sun, 25 Jan 2015 20:16:45 +0000 (20:16 +0000)]
If the boot-time memory test is enabled, output a dot ('.') for
each GB of RAM tested so people watching the console can see that
the machine is making progress and not hung.
PR: 196650
Submitted by: Ravi Pokala <rpokala@panasas.com>
Suggestions from: Eric van Gyzen <eric@vangyzen.net>
MFC after: 2 weeks
John Baldwin [Sun, 25 Jan 2015 19:45:44 +0000 (19:45 +0000)]
Use an sbuf to generate the output of the net.inet.tcp.hostcache.list
sysctl to avoid a possible buffer overflow if the cache grows while the
text is being generated.
Mark Johnston [Sun, 25 Jan 2015 00:47:06 +0000 (00:47 +0000)]
gr_equal(): Fix a crash that could occur if the first group's member list
was longer than the second's. There is no need to compute and compare the
member list lengths in a separate pass, since we now just return false when
comparing member names if the list lengths are not equal.
Ian Lepore [Sat, 24 Jan 2015 20:18:37 +0000 (20:18 +0000)]
Reimplement fdt_clock_register_provider() correctly. It turns out you
can't use OF_xref_from_device() to implement the function that registers
the xref association with the device.
Will Andrews [Sat, 24 Jan 2015 17:32:45 +0000 (17:32 +0000)]
Add vm.panic_on_oom sysctl, which enables those who would rather panic than
kill a process, when the system runs out of memory. Defaults to off.
Usually, this is most useful when the OOM condition is due to mismanagement
of memory, on a system where the applications in question don't respond well
to being killed.
In theory, if the system is properly managed, it shouldn't be possible to
hit this condition. If it does, the panic can be more desirable for some
users (since it can be a good means of finding the root cause) rather than
killing the largest process and continuing on its merry way.
As kib@ mentions in the differential, there is also protect(1), which uses
procctl(PROC_SPROTECT) to ensure that some processes are immune. However,
a panic approach is still useful in some environments. This is primarily
intended as a development/debugging tool.
Ryan Stone [Sat, 24 Jan 2015 16:59:38 +0000 (16:59 +0000)]
vmspace_release() may sleep if the last reference is being released,
so add a WITNESS_WARN() to catch cases where it is called with a
non-sleepable lock held.
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