locking and doesn't sleep. Flag the consumer we create as such. In
addition, decrement the in flight index when we have an out of memory
error after having incremented it previously. This would have
prevented swapoff from working if the swap pager ever hit a resource
shortage trying to swap out something (the swap in path always waits
for a bio, so won't have this issue). Simplify the close logic by
abandoning the use of private and initializing the index to 1 and
dropping that reference when we previously set private.
Also, set sw_id only while sw_dev_mtx is held. This should only affect
swapping to a vnode, as opposed to a geom whose close always sets it to
NULL with sw_dev_mtx held.
Differential Review: https://reviews.freebsd.org/D3547
vendor supplied device trees contain the needed properties for us to select
the correct uart to use as the kernel console.
An example of this would be to add the following to loader.conf.
hw.fdt.console="/smb/uart@f7113000"
The intention of this is slightly different than the existing
hw.uart.console option. The new option will mean the boot serial
configuration will be derived from the device node, while the existing
option expects the user to configure all this themselves.
Further work is planned to allow the uart configuration to be set based on
the stdout-path property devicetree bindings.
Sponsored by: ABT Systems Ltd
Differential Revision: https://reviews.freebsd.org/D3559
Certain VM guest types (VMware, Xen) do not support MSI, so pci_alloc_msix()
always fails. isci(4) was not properly detecting the allocation failure,
and would try to proceed with MSIx resource initialization rather than
reverting to INTx.
Reported and tested by: Bradley W. Dutton (brad-fbsd-stable@duttonbros.com)
MFC after: 3 days
Sponsored by: Intel
BIOS always enables PCI busmaster on the isci device, which effectively
worked around this omission. But when passing the isci device through
to a guest VM, the hypervisor will disable busmaster and isci will not
work without calling pci_enable_busmaster().
MFC after: 3 days
Sponsored by: Intel
RANDOM_LOADABLE and RANDOM_YARROW's definitions from opt_random.h to
opt_global.h
This unbreaks `make depend` in sys/modules with multiple drivers (tmpfs, etc)
after r286839
X-MFC with: r286839
Reviewed by: imp
Submitted by: lwhsu
Differential Revision: D3486
so that there is only one place where pages are freed and only one place
where pages are moved to the tail of the queue.
Reviewed by: kib
Sponsored by: EMC / Isilon Storage Division
This is a subtle use-after-free race that results in some very undesirable
hang behaviour.
Reviewed by: pkelsey
Obtained from: Kip Macy, NextBSD (91a9bd1dbb)
The filedesc lock is only needed if ioctls caps are present, which is a
rare situation. This is a step towards reducing the scope of the filedesc
lock.
no option but to use the smbios information to fill in the blanks.
It's a good thing UGA is a protocol of the past and GOP has all the
info we need.
Anyway, the logic has been tweaked a little to get the easier bits
of information up front. This includes the resolution and the frame
buffer address. Then we look at the smbios information and define
expected values as well as the missing bits (frame buffer offset and
stride). If the values obtained match the expect values, we fill in
the blanks and return. Otherwise we use the existing detection logic
to figure it out.
Rename the environment variables from uga_framebuffer abd uga_stride
to hw.efifb.address and hw.efifb.stride. The latter names are more
in line with other variable names.
We currently have hardcoded settings for:
1. Mid-2007 iMac (iMac7,1)
2. Late-2007 MacBook (MacBook3,1)
store should have release semantics and will have due to the dsb above it
so add a comment to explain this. [1]
While here update the code to not reload the current thread, it's already
in a register, we just need to not trash it.
Suggested by: kib [1]
Sponsored by: ABT Systems Ltd
because the RSS hash may need to be recalculated.
Submitted by: Tiwei Bie <btw@mail.ustc.edu.cn>
Differential Revision: https://reviews.freebsd.org/D3564
This is preparation for possibility to open/close media several times
per LUN life cycle. While there, rename variables to reduce confusion.
As additional bonus this allows to open read-only media, such as ZFS
snapshots.
the size of the name cache hash table (mapping file names to vnodes)
and the vnode hash table (mapping mount point and inode number to vnode).
An appropriate locking strategy is the key to changing hash table sizes
while they are in active use.
Reviewed by: kib
Tested by: Peter Holm
Differential Revision: https://reviews.freebsd.org/D2265
MFC after: 2 weeks
striking a delicate balance between exhaustive searching and
banking on assumptions. The environment variables can be used
as a fall-back anyway. With this change, all known and tested
Macs with only UGA should have a working console out of the
box... for now...
pages will have left the inactive queue before the page daemon performs
its next scan. Also, ignore references to pages from terminated objects.
This allows the clean pages to be freed a little sooner.
Move some comments to their proper place, i.e., next to the code that
they describe, and update other nearby comments.
Reviewed by: kib
Sponsored by: EMC / Isilon Storage Division
hardware to perform address translation for us. These are useful to help
track down what caused us to enter the debugger.
Sponsored by: ABT Systems Ltd
o Unlike xor, in Jenkins hash every bit of input affects virtually
every bit of output, thus salting the hash actually works. With
xor salting only provides a false sense of security, since if
hash(x) collides with hash(y), then of course, hash(x) ^ salt
would also collide with hash(y) ^ salt. [1]
o Jenkins provides much better distribution than xor, very close to
ideal.
TCP connection setup/teardown benchmark has shown a 10% increase
with default hash size, and with bigger hashes that still provide
possibility for collisions. With enormous hash size, when dataset is
by an order of magnitude smaller than hash size, the benchmark has
shown 4% decrease in performance decrease, which is expected and
acceptable.
Noticed by: Jeffrey Knockel <jeffk cs.unm.edu> [1]
Benchmarks by: jch
Reviewed by: jch, pkelsey, delphij
Security: strengthens protection against hash collision DoS
Sponsored by: Nginx, Inc.
Some places in our network stack already have const
arguments (like if_output() routines and LLE functions).
Code using ifa_ifwith (and similar functins) along with
LLE/_output functions is currently bound to use tricks
like __DECONST(). Provide a cleaner way by making sockaddr
lookup key really constant.
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D3464
in the frame buffer when we flip pixels. Allow the detection
to be bypassed by setting the uga_framebuffer and uga_stride
variables. The kernel console works fine even when we can't
detect pixel changes in the frame buffer, which indicates
that the problem could be with reading from the frame buffer
and not writing to it.
nlge(4) is supposed to deprecate rge(4) for Broadcom XLR when it was
introduced 5 years ago.
rge doesn't build on -CURRENT due to MII changes. All the XLR kernel confs
use nlge. Let's get rid of the old driver for FreeBSD 11. We can use
10-STABLE or SVN to go back and look at the old driver if needed.
Differential Revision: https://reviews.freebsd.org/D3339
Submitted by: kevin.bowling@kev009.com
Gleaned from a public header file. 5402 and 5404 look like they may be
used on embedded devices. 5478 and 5488 are switch PHYs. 5754 change is just
to note a product alias.
Differential Revision: https://reviews.freebsd.org/D3338
Submitted by: kevin.bowling@kev009.com
