Previously, with serseq enabled, next command was unblocked only after
previous completed. With this change, for read operations, next command
is unblocked as soon as last media read completed. This is important
for frontends that actually wait for data move completion (like camtgt),
or when data are moved through the HA link, or especially when both.
Note that the mountlist manipulations are somewhat fragile, and not very
pretty. The reason for this is to avoid changing vfs_mountroot(), which
is (obviously) rather mission-critical, but not very well documented,
and thus hard to test properly. It might be possible to rework it to use
its own simple root mount mechanism instead of vfs_mountroot().
Reviewed by: kib@
MFC after: 1 month
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D2698
We should not call vm_fault(), or send a signal, with interrupts
disabled. MI kernel code is not prepared for such environment, not to
mention that this increases system latency, since code appears to be
executing as being under spinlock.
The FAR register for data aborts is read before the interrupts are
enabled, to avoid its corruption due to nested exception or context
switch.
Add asserts, similar to the checks done by other architectures, about
not taking page faults in non-sleepable contexts, rather than die with
late and somewhat confusing witness diagnostic.
Reviewed by: andrew
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D3669
in unknown state per spec.
Reviewed by: andrew (previous version)
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D3668
requirements.
Don't start the opmode and join path until a pending survey is finished.
This seems to reliably fix things.
Ideally I'd just finish off the net80211 pluggable scan stuff and implement
the methods here so if_rsu can just drive the scan machinery.
However, that's a .. later thing.
Whilst here, remove the getbuf debugging; it's okay to run out of transmit
buffers under load; it however isn't okay to not be able to send commands.
I'll fix that later.
for re-ordering.
Devices like if_rsu don't pass through action/management frames but do send
firmware commands to inform us of things. One of those notifications is
the RX A-MPDU negotiated parameters.
* Add a tunable to enable 11n if it's available, so to not anger people
who upgrade.
kenv hw.usb.rsu.enable_11n=1 before inserting the device.
* Add initial 11n htconfig bits;
* Enable 40MHz mode if it's available;
* Add 11n channels;
* Set 11n bits in the firmware.
It works for RX; I haven't tested TX aggregation just yet.
However the firmware doesn't do RX re-ordering, so I have to tie it into
the net80211 A-MPDU RX reorder path before I flip this on by default.
I've verified that I'm indeed actually seeing MCS 0->7 rates being received.
I haven't dug into whether it's actually transmitting 11n rates; I'll dig into
that later.
with a reference count of zero can't possibly be mapped, so there is never a
need for vm_page_set_invalid() to call pmap_remove_all() on them.
Reviewed by: kib
MFC after: 1 week
Sponsored by: EMC / Isilon Storage Division
Also note that these env-only vars can be specified on the command line.
This fixes the dependent options that are env-only (such as WITH_META_MODE
and WITH_AUTO_OBJ) to properly display their dependencies.
Sponsored by: EMC / Isilon Storage Division
that checksum of vdev label should be checked (which is not done
currently).
No functional change.
While I'm there, raise WARNS to 2.
Reviewed by: allanjude
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D3508
hold the kernel, modules, and any other loaded data. This memory block
is relocated to the kernel's expected location during the transfer of
control from the loader to the kernel.
The GENERIC kernel on amd64 has recently grown such that a kernel + zfs.ko
no longer fits in the default staging size. Bump the default size from
32MB to 48MB to provide more breathing room.
PR: 201679
Reviewed by: imp
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D3666
/sbin/route has a bug where if it is passed an interface name that does
not exist, it falls through and winds up interpreting it as a hostname.
It fails out eventually, but on a system where DNS lookup is broken you
can end up waiting for up to 60 seconds waiting for the DNS lookup to
timeout. I'm not quite sure what happens if the DNS lookup somehow
succeeds but I doubt that can end well.
Reviewed by: markj, cem
MFC after: 2 weeks
Sponsored by: EMC/Isilon Storage Division
r284708 addressed this slightly but seems to have put the make(showconfig)
guard in the wrong place. Rather than guard setting the default obj directory,
guard inclusion of auto.obj.mk. This avoids creating SRCTOP/obj and
SRCTOP/release/obj when running makeman.
Sponsored by: EMC / Isilon Storage Division
