gnn [Fri, 1 May 2015 12:49:03 +0000 (12:49 +0000)]
Add a state transition call to show that we have entered TIME_WAIT.
Although this is not important to the rest of the TCP processing
it is a conveneint way to make the DTrace state-transition probe
catch this important state change.
crunchide: Restore local EM_AARCH64 constant for bootstrapping
Most of the EM_* constants are available in all supported host branches,
but EM_AARCH64 was added relatively recently. Add it back to fix
building HEAD on 10.x.
Rename macros to use prefix ERRNO. Add macro ERRNO_SET. Now
ERRNO_{RESTORE/SAVE} must by used together, additional variable is not
needed. Always use ERRNO_{SAVE/RESTORE/SET} macros.
Various fixes to the stats in igb(4), ixgbe(4), and ixl(4).
- Use hardware counters for ifnet stats in igb(4) when possible. This
ensures these stats include packets that bypass the regular stack via
netmap.
- Don't derefence values off the end of the igb(4) VF stats structure.
Instead, add a dedicated if_get_counter method for igb(4) VF interfaces.
- Report missed packets on igb(4) as input queue drops rather than an
input error.
- Report bug_ring drop counts as output queue drops for igb(4) and ixgbe(4).
- Export the buf_ring drop stats for individual rings via sysctl on
ixgbe(4).
- Fix a typo that in ixl(4) that caused output queue drops to be reported
as input queue drops and input queue drops to be unreported.
Remove support for Xen PV domU kernels. Support for HVM domU kernels
remains. Xen is planning to phase out support for PV upstream since it
is harder to maintain and has more overhead. Modern x86 CPUs include
virtualization extensions that support HVM guests instead of PV guests.
In addition, the PV code was i386 only and not as well maintained recently
as the HVM code.
- Remove the i386-only NATIVE option that was used to disable certain
components for PV kernels. These components are now standard as they
are on amd64.
- Remove !XENHVM bits from PV drivers.
- Remove various shims required for XEN (e.g. PT_UPDATES_FLUSH, LOAD_CR3,
etc.)
- Remove duplicate copy of <xen/features.h>.
- Remove unused, i386-only xenstored.h.
Differential Revision: https://reviews.freebsd.org/D2362
Reviewed by: royger
Tested by: royger (i386/amd64 HVM domU and amd64 PVH dom0)
Relnotes: yes
Much of the code was common to begin with. There is one nit, which is likely
not an issue at all. With the old code, the AIM machdep would __syncicache()
the entire kernel core at setup. However, in the unified setup, that seems to
hang on the MPC7455, perhaps because it's running later than before. Removing
this allows it to boot just fine. Examining the code, the FreeBSD loader
already does syncicache of the full kernel, and each module loaded, so this
doesn't appear to be an actual problem.
Phabricator: enable "history.immutable":
With certain arc workflows leaving history.immutable as false
results in using the upstream template instead of our usual
commit template. Since the git workflow issues alluded to in my
prior commit message can be worked around, set history.immutable
once again.
Fix native-xtools breakage when building a gcc enabled target on a clang
enabled host. Build a one-off gperf and put it in the PATH for the rest
of the target so the ONE call to gperf by the gcc build picks it up and
DTRT.
Re-implement RTC current time calculation to eliminate the possibility of
losing time.
The problem with the earlier implementation was that the uptime value
used by 'vrtc_curtime()' could be different than the uptime value when
'vrtc_time_update()' actually updated 'base_uptime'.
Fix this by calculating and updating the (rtctime, uptime) tuple together.
Those functions are problematic, because there is no way to report
memory allocation problems without complicating the API, so we can
either abort or potentially return invalid results. None of which is
acceptable.
In most cases the caller knows the size of the name, so he can allocate
buffer on the stack and use snprintf(3) to prepare the name.
After some discussion the conclusion is to removed those functions,
which also simplifies the API.
Previously the mask wrapped when one or more of the mask bytes extended
past the right edge of the window. Simplify the logic and use the same
byte offset and bit in both the pattern and mask.
PR: 199648
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D2360
Don't free mbufs when stopping an interface in netmap mode.
Currently if you ifconfig down a vtnet interface while it is being used
via netmap, the kernel panics due to trying to treat the cookie values
in the virtio rings as mbufs to be freed. When netmap is enabled, these
cookie values are pointers to something else.
Note that other netmap-aware drivers don't seem to need this as they
store the mbuf pointers in the software rings that mirror the hardware
descriptor rings, and since netmap doesn't touch those, the software
state always has NULL mbuf pointers causing the loops to free mbufs to
not do anything. However, vtnet reuses the same state area for both
netmap and non-netmap mode, so it needs to explicitly avoid looking at
the rings and treating the cookie values as mbufs if netmap is
enabled.
Differential Revision: https://reviews.freebsd.org/D2348
Reviewed by: adrian, bryanv, luigi
MFC after: 1 week
Sponsored by: Norse Corp, Inc.
Revert r282227. It is clearly incorrect as it frees an object that is still
referenced. I think that there does exist an unlikely edge case for a
memory leak, but only if a driver is incorrectly written and specifies no
valid range of targets to scan. That can be fixed in a follow-up commit.
Improve support for blacklisting bad memory locations. The user can supply
a text file with a list of physical memory addresses to exclude, and have it
loaded at boot time via the provided example in loader.conf. The tunable
'vm.blacklist' remains, but using an external file means that there's no
practical limit to the size of the list. This change also improves the
scanning algorithm for processing the list, scanning the list only once
instead of scanning it for every page in the system. Both the sysctl and
the file can be unsorted and contain duplicates so long as each entry is
numeric (decimal or hex) and is separated by a space, comma, or newline
character. The sysctl 'vm.page_blacklist' is now provided to report what
memory locations were successfully excluded.
Reviewed by: imp, emax
Obtained from: Netflix, Inc.
MFC after: 3 days
vt_vga: add a timeout while waiting for vertical retrace
On one of my systems FreeBSD will fail to boot because vt_vga gets stuck
waiting for the vertical retrace if there's no monitor attached. Fix this by
adding a timeout and exiting if the vertical retrace times out.
Add kern.racct.enable tunable and RACCT_DISABLED config option.
The point of this is to be able to add RACCT (with RACCT_DISABLED)
to GENERIC, to avoid having to rebuild the kernel to use rctl(8).
Differential Revision: https://reviews.freebsd.org/D2369
Reviewed by: kib@
MFC after: 1 month
Relnotes: yes
Sponsored by: The FreeBSD Foundation
Microsoft vmbus, storage and other related driver enhancements for HyperV.
- Vmbus multi channel support.
- Vector interrupt support.
- Signal optimization.
- Storvsc driver performance improvement.
- Scatter and gather support for storvsc driver.
- Minor bug fix for KVP driver.
Thanks royger, jhb and delphij from FreeBSD community for the reviews
and comments. Also thanks Hovy Xu from NetApp for the contributions to
the storvsc driver.
ATF_REQUIRE_KERNEL_MODULE: use atf_skip, not ATF_REQUIRE_MSG so the testcase
no longer bombs out
PLAIN_REQUIRE_KERNEL_MODULE: use printf + _exit, no err so the testcase no
longer bombs out if it prints to stderr
In traverse_visitbp(), the input argument dnp is modified in the middle
to point to a temporary buffer. Originally this doesn't matter, because
no user of TRAVERSE_POST dereferences it. However, in fbeddd6 a piece of
code is added dereferencing dnp after the modification, creating a possible
bug.
We fix this by creating a new local variable cdnp for the DMU_OT_DNODE case,
so we don't modify the input argument. Also we introduce different local
variables in the DMU_OT_OBJSET case to prevent confusion between the input
argument.
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