most recently used buffer when we are under paging pressure. This is
a perversion of the buffer and page replacement algorithms and recent
improvements to the page daemon have rendered it unnecessary. In the
event that low-memory deadlocks become an issue it would be possible
to make a daemon or event handler that performs a similar action on
the oldest buffers rather than the newest. Since the buf cache
is analogous to the page cache and some minimum working set is desired
another possibility is to simply shrink the minimum working set which
has less downside now that file pages are not directly mapped.
Sponsored by: EMC / Isilon
Reviewed by: alc, kib (with some minor objection)
Tested by: pho
Apologies, this was how it was supposed to land. Mea culpa.
Differential Revision: https://reviews.freebsd.org/D3157
Reviewed by: gnn, hiren
Approved by: markj (mentor)
MFC after: 1 week
Driver must be able to start against older firmware that is missing
recently added MCDI calls, otherwise firmware upgrade will not be
possible.
Submitted by: Richard Houldsworth <rhouldsworth at solarflare.com>
Sponsored by: Solarflare Communications, Inc.
MFC after: 2 days
Differential Revision: https://reviews.freebsd.org/D3145
1) We were not handling (or sending) the IN_PROGRESS case if
the other side (or our side) was not able to reset (awaiting more data).
2) We would improperly send a stream-reset when we should not. Not
waiting until the TSN had been assigned when data was inqueue.
Reviewed by: tuexen
- Allocate resources for MSI-X table and PBA if necessary
- Add function ahci_free_mem() to free all resources
Reviewed by: jhb, mav
Obtained from: Semihalf
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D3009
Place all of the machine/pointer size independent code in a kernel
module called 'cloudabi'. All of the 64-bit specific code goes in a
separate module called 'cloudabi64'. The latter is only enabled on
amd64, as it is the only architecture supported.
Windows Server 2012 and earlier hosts.
Submitted by: whu
Reviewed by: royger
Approved by: royger
MFC after: 3 days
Relnotes: No
Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D3086
- Fix segment registers to only display the low 16 bits.
- Remove unused handlers and entries for the debug registers.
- Display xcr0 (if valid) in 'show sysregs'.
- Add '0x' prefix to MSR values to match other values in 'show sysregs'.
- MFamd64: Display various MSRs in 'show sysregs'.
- Add a 'show dbregs' to display the value of debug registers.
- Dynamically size the column width for register values to properly
align columns on 64-bit platforms.
- Display %gs for i386 in 'show registers'.
Differential Revision: https://reviews.freebsd.org/D2784
Reviewed by: kib, markj
MFC after: 2 weeks
In the kernel, structs such as tcpstat are manipulated as an array of
counter_u64_t (uint64_t *), but made visible to userland as an array of
uint64_t. kread_counters() was previously copying the counter array into
user space and sequentially overwriting each counter with its value. This
mostly affects IPsec counters, as other counters are exported via sysctl.
PR: 201700
Tested by: Jason Unovitch
MFC after: 1 week
The i386 and amd64 DDB stack unwinders contain code to detect and handle
the case where the first frame is not completely set up or torn down. This
code was accidentally unused however, since db_backtrace() was never called
with a non-NULL trap frame. This change fixes that.
Also remove get_rsp() from the amd64 code. It appears to have come from
i386, which needs to take into account whether the exception triggered a
CPL switch, since SS:ESP is only pushed onto the stack if so. On amd64,
SS:RSP is pushed regardless, so get_rsp() was doing the wrong thing for
kernel-mode exceptions. As a result, we can also remove custom print
functions for these registers.
Reviewed by: jhb
Sponsored by: EMC / Isilon Storage Division
Differential Revision: https://reviews.freebsd.org/D2881
If we can't find a symbol corresponding to the faulting instruction, assume
that the previously-executed function is a call and attempt to find the
calling function using the return address on the stack. Otherwise we end
up associating the last stack frame with the current call, which is
incorrect and causes the unwinder to skip printing of the calling function,
resulting in a confusing backtrace.
Reviewed by: jhb
Sponsored by: EMC / Isilon Storage Division
Differential Revision: https://reviews.freebsd.org/D2859
Undefined symbols have a value of zero, so it makes no sense to return
such a symbol when performing a lookup by value. This occurs for example
when unwinding the stack after calling a NULL function pointer, and we
confusingly report the faulting function as uart_sab82532_class() on
amd64.
Convert db_print_loc_and_inst() to only attempt disassembly if we managed
to find a symbol corresponding to the IP. Otherwise we may fault and
re-enter the debugger.
Reviewed by: jhb
Sponsored by: EMC / Isilon Storage Division
Differential Revision: https://reviews.freebsd.org/D2858
The amd64 port copied some code from i386 to fetch function arguments and
display them in backtraces. However, it was commented out and can't easily
be implemented since the function arguments are passed in
registers rather than on the stack in amd64. Remove it in preparation for
some bug fixes in this area.
Reviewed by: jhb
Sponsored by: EMC / Isilon Storage Division
Differential Revision: https://reviews.freebsd.org/D2857
done by the functions called on other CPUs, are visible to the caller.
Pair otherwise useless acquire on smp_rv_waiters[3] with a release add
to ensure synchronized with relation, which guarantees visibility.
Reviewed by: alc
Sponsored by: The FreeBSD Foundation
MFC after: 3 weeks
- Add required MAC/VLAN filter when adding an LAA
- Fix bug where code did not check for I40E_SUCCESS from a successful
i40e_validate_mac_address() call in ixl_init_locked(), when setting
an LAA.
PR: 201240
Differential Revision: https://reviews.freebsd.org/D3111
Submitted by: Gregory Rose <gregory.v.rose@intel.com>
Reviewed by: gnn, rstone
Approved by: gnn
MFC after: 2 weeks
The NVMe specification has no ability to specify a maximum delete size
that is less than the full capacity of the namespace - so just using the
namespace size is the correct value here.
This fixes reported issues where ZFS trim on init looked like it was
hanging the system - previously the default I/O max size (128KB on
Intel NVMe controllers) was used for delete operations which worked out
to only about 8MB/s. With this patch I can add an 800GB DC P3700
drive to a ZFS pool in about 15-20 seconds.
Reported by: Dylan Just <dylan@techtangents.com>
MFC after: 3 days
Sponsored by: Intel
This feature is inspired by another Unix-alike OS commonly found on
airplane headrests.
A number of beasties[0] are drawn at top of framebuffer during boot,
based on the number of active SMP CPUs[1]. Console buffer output
continues to scroll in the screen area below beastie(s)[2].
After some time[3] has passed, the beasties are erased leaving the
entire terminal for use.
Includes two 80x80 vga16 beastie graphics and an 80x80 vga16 orb
graphic. (The graphics are RLE compressed to save some space -- 3x 3200
bytes uncompressed, or 4208 compressed.)
[0]: The user may select the style of beastie with
kern.vt.splash_cpu_style=(0|1|2)
[1]: Or the number may be overridden with tunable kern.vt.splash_ncpu.
[2]: https://www.youtube.com/watch?v=UP2jizfr3_o
[3]: Configurable with kern.vt.splash_cpu_duration (seconds, def. 10).
Differential Revision: https://reviews.freebsd.org/D2181
Reviewed by: dumbbell, emaste
Approved by: markj (mentor)
MFC after: 2 weeks
Explicitly mark existing VT_SYSCTL_INTs static. This is in preparation for
D2181.
Reviewed by: dumbbell, emaste
Approved by: markj (mentor)
MFC after: 1 week
Add brief commentary to vendor-specific devid function in ITS
and remove redundant spaces by the way.
Obtained from: Semihalf
Sponsored by: The FreeBSD Foundation
malloc() should not go to sleep in case of lack of resource while
the kernel thread is holding a non-sleepable lock.
- change malloc() flags to M_NOWAIT in such cases implement
lpi_free_chunk() routine as it will be needed when ITT
allocation fails in its_device_alloc_locked()
- do not increase verbosity of this code since upper layers will
communicate an error if the interrupt setup fails
Obtained from: Semihalf
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D3121
Though the standard C library uses a 'struct timespec' using a 64-bit
'time_t', there is no need to use such a type at the system call level.
CloudABI uses a simple 64-bit unsigned timestamp in nanoseconds. This is
sufficient to express any time value from 1970 to 2554.
The CloudABI low-level interface also supports fetching timestamp values
with a lower precision. Instead of overloading the clock ID argument for
this purpose, the system call provides a precision argument that may be
used to specify the maximum slack. The current system call
implementation does not use this information, but it's good to already
have this available.
Expose cloudabi_convert_timespec(), as we're going to need this for
fstat() as well.
Obtained from: https://github.com/NuxiNL/freebsd
It is possible that some HW will use different PCI devids,
hence allow to replace the default domain🚌slot:func schema
by implementing and registering custom function.
Obtained from: Semihalf
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D3118
it_need was wrong [*]. Restore the releases and add a comment
explaining why it is needed.
Noted by: alc [*]
Reviewed by: bde [*]
Sponsored by: The FreeBSD Foundation
Use Vritual Counter register associated with Generic Timer to
read the cyclecount.
Obtained from: Semihalf
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D3134
Summary:
Remove the stub system call that was put in place during the system call
import and replace it by a target-dependent version stored in sys/amd64.
Initialize the thread in a way similar to cpu_set_upcall_kse(). We
provide the entry point with two arguments: the thread ID and the
argument pointer.
Test Plan:
Thread creation still seems to work, both for FreeBSD and CloudABI
binaries.
Reviewers: dchagin, mjg, kib
Reviewed By: kib
Subscribers: imp
Differential Revision: https://reviews.freebsd.org/D3110
Add a method to identify CPU based on RAW MIDR value.
Obtained from: Semihalf
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D3117
According to the last(1) man page, the "reboot" pseudo-user should print
all system reboot entries. This got broken by the utmpx import, as
records are typed.
Re-add support for "last reboot" by specifically matching against
SHUTDOWN_TIME and BOOT_TIME records.
PR: 168844
Submitted by: matthew@
MFC after: 1 month
lock on the INP before calling the tunnel protocol, else a LOR
may occur (it does with SCTP for sure). Instead we must acquire a
ref count and release the lock, taking care to allow for the case
where the UDP socket has gone away and *not* unlocking since the
refcnt decrement on the inp will do the unlock in that case.
Reviewed by: tuexen
MFC after: 3 weeks
