dim [Sat, 8 Sep 2012 11:34:22 +0000 (11:34 +0000)]
MFC r239680:
Add libcxxrt's objects (prefixing them with cxxrt_ to avoid collisions)
to libc++.a and libc++_p.a, to make static linking of C++ executables
with libc++ easier. This is similar to the approach used in libstdc++.
MFC r239686:
When using -stdlib=libc++, add the correct dependency to .depend in
bsd.prog.mk.
For building libstdc++ and libsupc++, filter out any -stdlib=libc++
option from CXXFLAGS, otherwise these libraries will not build.
Similarly, filter out any -std=xxx options that aren't supported.
MFC r230454:
Use provided name when allocating ksid domain. It isn't really used on FreeBSD,
but should fix a panic when pool is imported from another OS that is using this.
No objections from; pjd
Approved by: cperciva (implicit)
dim [Fri, 7 Sep 2012 18:03:29 +0000 (18:03 +0000)]
MFC r239962:
Fix a twelve year old bug in readelf: when process_dynamic_segment()
encounters a DT_RUNPATH entry, the global dynamic_info[] array is
overrun, causing some other global variable to be overwritten.
In my testcase, this was the section_headers variable, leading to
segfaults or jemalloc assertions when it was freed later on.
Thanks to Koop Mast for providing samples of a few "bad" .so files.
dim [Fri, 7 Sep 2012 17:58:36 +0000 (17:58 +0000)]
MFC r239959:
Work around several warnings from clang in the xfs filesystem, when
linking it statically into the kernel. With our gcc in base there are
no warnings, so also remove the WERROR= from the module makefile.
Noted by: Eir Nym <eirnym@gmail.com>
MFC r240011:
Partially revert r239959, after actually fixing most of the clang
warnings in sys/gnu/fs/xfs. The only warnings that still need to be
suppressed are those about array bound overruns of flexible array
members in xfs_dir2_{block,sf}.c, which are too expensive (in terms of
cascading code changes) to fix.
dim [Fri, 7 Sep 2012 17:51:12 +0000 (17:51 +0000)]
MFC r239869:
Remove the argument-less .align directive in sys/i386/bios/smapi_bios.S.
Specifying no argument is undocumented in the gas manual, and clang's
integrated assembler refuses to parse it. Also, removing it causes no
change at all in the resulting object file.
MFC many cxgb and cxgbe features and fixes (r239258, r239259, r239264,
r239266, r239336, r239338, r239339, r239341, r239344, r239514, r239527,
r239528, r239544.
r239258:
Convert some fixed parameters to tunables (with reasonable default
values).
- cong_drop specifies what to do on congestion: nothing, backpressure,
or drop.
- fl_pktshift specifies the padding before Ethernet payload.
- fl_pad specifies the boundary upto which to pad Ethernet payload.
- spg_len controls the length of the status page.
r239259:
if_iqdrops should include frames truncated within the chip.
r239264:
Assume INET, INET6, and TCP_OFFLOAD when the driver is built out of tree and
KERNBUILDDIR is not set.
r239266:
The size of the buffers in an Ethernet freelist has to be higher than the
interface's MTU. Initialize such freelists with correct values.
This wasn't a problem for common MTUs (1500 and 9000) as the buffers (2048
and 9216 in size) happened to have enough spare room. I ran into it when
playing around with unusual MTUs.
r239336:
Allow for a different handler for each type of firmware message.
r239338:
Add a routine (t4_set_tcb_field) to update arbitrary parts of a hardware
TCB. Filters are programmed by modifying the TCB too (via a different
routine) and the reply to any TCB update is delivered via a
CPL_SET_TCB_RPL. Figure out whether the reply is for a filter-write or
something else and route it appropriately.
r239339:
Make room for DDP page pods in the default configuration profile. While
here, bump up the L2 table's size to 4K entries.
r239341:
Initialize various DDP parameters in the main cxgbe(4) driver:
- Setup multiple DDP page sizes. When the driver attempts DDP it will
try to combine physically contiguous pages into regions of these sizes.
- Set the indicate size such that the payload carried in the indicate can
be copied in the header mbuf (and the 16K rx buffer can be recycled).
- Set DDP threshold to the max payload that the chip will coalesce and
deliver to the driver (this is ~16K by default, which is also why the
offload rx queue is backed by 16K buffers). If the chip is able to
coalesce up to the max it's allowed to, it's a good sign that the peer
is transmitting in bulk without any TCP PSH.
r239344:
Support for TCP DDP (Direct Data Placement) in the T4 TOE module.
Basically, this is automatic rx zero copy when feasible. TCP payload is
DMA'd directly into the userspace buffer described by the uio submitted
in soreceive by an application.
- Works with sockets that are being handled by the TCP offload engine
of a T4 chip (you need t4_tom.ko module loaded after cxgbe, and an
"ifconfig +toe" on the cxgbe interface).
- Does not require any modification to the application.
- Not enabled by default. Use hw.t4nex.<X>.toe.ddp="1" to enable it.
r239514:
Minor cleanup: use bitwise ops instead of pointless wrappers around
setbit/clrbit.
r239527:
Cannot hold a mutex around vm_fault_quick_hold_pages, so don't. Tweak
some comments while here.
r239528:
Avoid a NULL pointer dereference.
r239544:
Deal with the case where a syncache entry added by the TOE driver is
evicted from the syncache but a later syncache_expand succeeds because
of syncookies. The TOE driver has to resort to more direct means to
install its hooks in the socket in this case.
thomas [Thu, 6 Sep 2012 07:45:45 +0000 (07:45 +0000)]
MFC: merge rev. 239012 from head to stable/9
New command "gmultipath prefer" to force selection of a specified
provider in an Active/Passive configuration.
Was chasing down a failure to load f/w on a 2400. It turns out that the card
is actually broken, or needs a BIOS upgrade for 64 bit loads, but this uncovered
a couple of misplaced opcode definitions and some missing continual mbox command
cases, so might as well update them here.
dim [Sun, 2 Sep 2012 11:44:30 +0000 (11:44 +0000)]
MFC r226216 (by das):
Pass -std= flags in CFLAGS to mkdep. Without this, preprocessor tests
for particular compiler features might be evaluated differently by
mkdep than they would be by cc.
MFC r226244 (by das):
Also pass the -ansi flag through to mkdep (requested by bde), and fix
a cut-and-paste-o (noticed by rdivacky).
MFC r239613:
Make sure bsd.dep.mk does not filter out -stdlib=xxx from CXXFLAGS,
since this determines parts of the C++ include path.
Just like the other file systems found in /sys/fs, g_vfs_open()
should be paried with g_vfs_close(). Though g_vfs_close() is a wrapper
around g_wither_geom_close(), r206130 added the following test in
g_vfs_open():
if (bo->bo_private != vp)
return (EBUSY);
Which will cause a 'Device busy' error inside reiserfs_mountfs() if
the same file system is re-mounted again after umount or mounting failure:
(case 1, /dev/ad4s3 is not a valid REISERFS partition)
# mount -t reiserfs -o ro /dev/ad4s3 /mnt
mount: /dev/ad4s3: Invalid argument
# mount -t msdosfs -o ro /dev/ad4s3 /mnt
mount: /dev/ad4s3: Device busy
(case 2, /dev/ad4s3 is a valid REISERFS partition)
# mount -t reiserfs -o ro /dev/ad4s3 /mnt
# umount /mnt
# mount -t reiserfs -o ro /dev/ad4s3 /mnt
mount: /dev/ad4s3: Device busy
On the other hand, g_vfs_close() 'fixed' the above cases by doing an
extra step to keep 'sc->sc_bo->bo_private' and 'cp->private' pointers
synchronised.
In tcp timers, check INP_DROPPED flag a little later, after
callout_deactivate(), so if INP_DROPPED is set we return with the
timer active flag cleared.
For me this fixes negative keep timer values reported by `netstat -x'
for connections in CLOSE state.
In epair_clone_destroy(), when destroying the second half, we have to
switch to its vnet before calling ether_ifdetach(). Otherwise if the
second half resides in a different vnet, if_detach() silently fails
leaving a stale pointer in V_ifnet list, and the system crashes trying
to access this pointer later.
Another solution could be not to allow to destroy epair unless both
ends are in the home vnet.
kib [Fri, 31 Aug 2012 12:04:29 +0000 (12:04 +0000)]
MFC r238669:
Force clean FPU state in PCB user FPU save area by performing
getfpuregs(9) before accessing user FPU save area in ptrace_machdep.c
for PT_I386_{GET,SET}XMMREGS and PT_{GET,SET}XSTATE.
kib [Fri, 31 Aug 2012 11:48:04 +0000 (11:48 +0000)]
MFC r238623:
Introduce curpcb magic variable, similar to curthread, which is MD
amd64. It is implemented as __pure2 inline with non-volatile asm read
from pcpu, which allows a compiler to cache its results.
Convert most PCPU_GET(pcb) and curthread->td_pcb accesses into curpcb.
MFC r238723:
Forcibly shut up clang warning about NULL pointer dereference.
kib [Fri, 31 Aug 2012 11:33:54 +0000 (11:33 +0000)]
MFC r238598:
On AMD64, provide siginfo.si_code for floating point errors when error
occurs using the SSE math processor. Update comments describing the
handling of the exception status bits in coprocessors control words.
jhb [Thu, 30 Aug 2012 20:42:42 +0000 (20:42 +0000)]
MFC 239128:
Don't try to stop the IPMI watchdog timer if it is not running.
Starting or stopping the IPMI watchdog is rather expensive with the
current implementation as all IPMI requests are bounced via thread.
This is not viable during shutdown or dumps, and this avoids headache
in the common case that the watchdog is not enabled. The IPMI watchdog
should probably be reworked to not use a separate thread to fix this
in the case when the watchdog timer is enabled.
jhb [Thu, 30 Aug 2012 19:46:38 +0000 (19:46 +0000)]
MFC 239103:
Explicitly enable busmastering on PCI-PCI bridges. Transactions initiated
on the secondary side of a bridge will not be propagated to the primary
bus unless this is enabled. Busmastering is not enabled by default (we
have relied on firmware to set this bit to date). The OS needs to set it
for any bridges not configured by system firmware.
jhb [Thu, 30 Aug 2012 18:29:49 +0000 (18:29 +0000)]
MFC 238424:
Make the interval timings for EVFILT_TIMER more accurate. tvtohz() always
adds an extra tick to account for the current partial clock tick. However,
that is not appropriate for a repeating timer when the exact tvtohz() value
should be used for subsequent intervals. Fix repeating callouts for
EVFILT_TIMER by subtracting 1 tick from the tvtohz() result similar to the
fix used in realitexpire() for interval timers.
While here, update a few comments to note that if the EVFILT_TIMER code
were to move out of kern_event.c, it should move to kern_time.c (where the
interval timer code it mimics lives) rather than kern_timeout.c.
jhb [Thu, 30 Aug 2012 18:03:03 +0000 (18:03 +0000)]
MFC 238311:
Add a clts() wrapper around the 'clts' instruction to <machine/cpufunc.h>
on x86 and use that to implement stop_emulating() in the fpu/npx code.
Reimplement start_emulating() in the non-XEN case by using load_cr0() and
rcr0() instead of the 'lmsw' and 'smsw' instructions. Intel explicitly
discourages the use of 'lmsw' and 'smsw' on 80386 and later processors in
the description of these instructions in Volume 2 of the ADM.
kib [Thu, 30 Aug 2012 10:23:27 +0000 (10:23 +0000)]
MFC r238703:
Put struct ostat and struct nstat under #ifdef _KERNEL. The
compatibility definitions are only needed for implementation of the
syscalls, they cause namespace pollution and are not useful for
applications.
jhb [Wed, 29 Aug 2012 21:12:19 +0000 (21:12 +0000)]
MFC 238142,238179:
Now that our assembler supports the xsave family of instructions, use them
natively rather than hand-assembled versions. For xgetbv/xsetbv, add a
wrapper API to deal with xcr* registers: rxcr() and load_xcr().
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