The current TSO limitation feature only takes the total number of
bytes in an mbuf chain into account and does not limit by the number
of mbufs in a chain. Some kinds of hardware is limited by two
factors. One is the fragment length and the second is the fragment
count. Both of these limits need to be taken into account when doing
TSO. Else some kinds of hardware might have to drop completely valid
mbuf chains because they cannot loaded into the given hardware's DMA
engine. The new way of doing TSO limitation has been made backwards
compatible as input from other FreeBSD developers and will use
defaults for values not set.
Reviewed by: adrian, rmacklem
Sponsored by: Mellanox Technologies
MFC after: 1 week
footprint systems(32M/64M) and didn't leave enough free memory to load modules
when it was setting up page tables that for sizes that are never used on
these smallish boards.
Set kmem_zmax to PAGE_SIZE on these smaller systems (< 128M) to keep this
from happening. Verified on mips32 h/w.
PR: 193465
Submitted by: delphij
Reviewed by: adrian
We've always considered the mpcore timers to be a single monolithic device
and we defined our own fdt binding for it with our own compat string. The
published bindings treat the timers as two separate devices, a global
timer and a "timer-watchdog" device for the per-cpu private timers. Thus
our binding has two tuples in the regs property, one set of registers for
the global timer and one for the private timers. The published bindings
have two separate devices, each with a single set of registers. (Note that
we don't use the optional watchdog feature of the hardware.)
These changes add the compat strings for the published bindings. If our
own compat string appears, we expect to get two sets of memory resources.
For the published bindings, there's only one set of memory resources, and
only the private timers have an associated interrupt.
The other major change is that there can no longer be a single global var
for the softc pointer because now there may be multiple devices at
runtime. Since the global timer is used only as a timecounter and the
private timers only as eventtimers, and there will only be one of each,
those are now the pointers which are global, and the priv fields of those
structures backlink to the device softc.
behavior was changed in r271888 so update the comment block to reflect this.
MSR_KGSBASE is accessible from the guest without triggering a VM-exit. The
permission bitmap for MSR_KGSBASE is modified by vmx_msr_guest_init() so get
rid of redundant code in vmx_vminit().
code. There are only a handful of MSRs common between the two so there isn't
too much duplicate functionality.
The VT-x code has the following types of MSRs:
- MSRs that are unconditionally saved/restored on every guest/host context
switch (e.g., MSR_GSBASE).
- MSRs that are restored to guest values on entry to vmx_run() and saved
before returning. This is an optimization for MSRs that are not used in
host kernel context (e.g., MSR_KGSBASE).
- MSRs that are emulated and every access by the guest causes a trap into
the hypervisor (e.g., MSR_IA32_MISC_ENABLE).
Reviewed by: grehan
The original code was .. well, slightly more than incorrect.
It showed up as stalled RX queues if the NIC needed to be frequently
reinitialised (eg during scans.)
This is inspired by work done by Matt Dillon over at the DragonflyBSD
project.
So:
* track when EDMA RX has been stopped and when the MAC has been reset;
* re-initialise the ring only after a reset;
* track whether RX has been stopped/started - just for debugging now;
* don't bother with the RX EOL stuff for EDMA - we don't need the
interrupt at all. We also don't need to disable/enable the interrupt
or start DMA - once new frames are pushed into the ring via the
normal RX path, it'll just restart RX DMA on its own.
Tested:
* AR9380, STA mode
* AR9380, AP mode
* AR9485, STA mode
* AR9462, STA mode
It's now possible to scroll up the 500 hard-coded lines of history, not
just a fraction of them. For instance, one can reach the top of the boot
process.
Sometimes, when scrolling or when changing the screen size (by changing
the font or loading a KMS driver for instance), one could see the
history cycling (old content appeared below latest lines). This is
fixed.
Now, when the resolution changes are more lines can be shown, the
displayed area is adjusted so that, if the screen was filled with
content before, it's filled with content after as well: more history
is visible, instead of having blank lines below the previously visible
content.
MFC after: 3 days
struct ifnet if_oqdrops.
Some netgraph modules used ifqueue w/o ifnet. Accounting of queue drops
is simply removed from them. There were no API to read this statistic.
Sponsored by: Netflix
Sponsored by: Nginx, Inc.
