calling scrub when pool is in a degraded state. It will try to taste ZVOLs,
which will lead to deadlock, as ZVOL will try to acquire the same locks as
replace/scrub is holding already.
We can't simply skip provider based on their GEOM class, because ZVOL can have
providers build on top of it and we need to skip those as well.
We do it by asking for ZFS::iszvol attribute. Any ZVOL-based provider will give
us positive answer and we have to skip those providers.
This way we remove possibility to create ZFS pools on top of ZVOLs, but it is
not very useful anyway.
I believe deadlock is still possible in some very complex situations like when
we have MD provider on top of UFS file on top of ZVOL. When we try to replace
dead component in the pool mentioned ZVOL is based on, there might be a
deadlock when ZFS will try to taste MD provider. There is no easy way to detect
that, but it isn't very common.
MFC after: 1 week
normal in case of media read error and some ATAPI cases, when transfer size
is unknown beforehand. PCI ATA BM specification tells that in case of such
underrun driver should just manually stop DMA engine. DMA engine should
same time guarantie that all bus mastering transfers completed at the moment
of driver reads interrupt flag asserted.
This change should fix interrupt storms and command timeouts in many cases.
PR: kern/103602, sparc64/121539, kern/133122, kern/139654
hooked and the difference in handling the 'enable' variable
for layer2 and layer3. The latter needs fixing once i figure out
how it worked pre-vnet.
MFC after: 7 days
native devices which support the v4l API from processes running within
the linuxulator, e.g. skype or flash can access the multimedia/pwcbsd driver.
Not tested is firmware upload, framebuffer stuff and video tuner stuff
due to lack of hardware.
The clipping part (VIDIOCSWIN) needs a little bit of further work (partly
in progress, but can not be tested due to lack of a suitable device).
The submitter tested this sucessfully with Skype and flash apps on amd64 and
i386 with the multimedia/pwcbsd driver.
Submitted by: J.R. Oldroyd <fbsd@opal.com>
The header is importet from linux 2.6.17.
The header does not come with a license, the author
(Alan Cox <alan@redhat.com>) gave his permission to use it (note, X.org
has a copy of the header too):
---snip---
> Alan Cox <alan@redhat.com> said:
>
> > On Tue, Apr 12, 2005 at 03:13:15PM -0700, Julian Elischer wrote:
> > > How does the licensing of the include files stand?
>
> Basically you cannot copyright an interface - its a fact rather
> than creative expression normally.
>
> > > Of course there's always the "type it all in again" approach
> > > where we define a functionally equivalent but completely
> > > differntly spelled API,
>
> Wouldn't even need to be differently spelled.
>
> I'm all for this kind of sharing.
>
> Alan
---snip---
A more complete mail history is provided in the README file.
Approved by: core
Thanks to: julian (he also has the OK to use the v4l2 header)
the loop down counter, as well as other things. This was brought to my
attention with a different fix, more for RELENG_7- this one covers the
multiple channel case.
PR: 140438
MFC after: 1 month
single outstanding DMA read operation. Most controllers targeted to
client with PCIe bus interface(e.g. BCM5761) may have this
limitation. All controllers for servers does not have this
limitation.
Collapsing mbuf chains to reduce number of memory reads before
transmitting was most effective way to workaround this. I got about
940Mbps from 850Mbps with mbuf collapsing on BCM5761. However it
takes a lot of CPU cycles to collapse mbuf chains so add tunable to
control the number of allowed TX buffers before collapsing. The
default value is 0 which effectively disables the forced collapsing.
For most cases 2 would yield best performance(about 930Mbps)
without much sacrificing CPU cycles.
Note the collapsing is only activated when the controller is on
PCIe bus and the frame does not need TSO operation. TSO does not
seem to suffer from the hardware limitation because the payload
size is much bigger than normal IP datagram.
Thanks to davidch@ who told me the limitation of client controllers
and actually gave possible workarounds to mitigate the limitation.
Reviewed by: davidch, marius
- Instead of measuring last request execution time for each drive and
choosing one with smallest time, use averaged number of requests, running
on each drive. This information is more accurate and timely. It allows to
distribute load between drives in more even and predictable way.
- For each drive track offset of the last submitted request. If new request
offset matches previous one or close for some drive, prefer that drive.
It allows to significantly speedup simultaneous sequential reads.
PR: kern/113885
Reviewed by: sobomax
Previously the failing operation would allocate an mbuf and construct an
error reply, but because the function did not return 0, the NFS server
assumed it had failed to generate a reply and would leak the reply mbuf as
well as not sending the reply to the NFS client.
PR: kern/140853
Submitted by: Ted Faber faber at isi edu (remove)
Reviewed by: rmacklem (remove)
MFC after: 1 week
Reviewed by: carvay,
the.infamous.paul@gmail.com,
Joan Picanyol i Puig <lists-freebsd-es@biaix.org>,
Ing . Marcos Luis Ortiz Valmaseda <mlortiz@uci.cu>,
eskanete@gmail.com,
Jose M Rodriguez <josemi@freebsd.jazztel.es>,
Guillermo Hernandez <guillermo@QuerySoft.es>,
dani.doni@gmail.com
Instead of digging through the utmp database by hand, use proper API
calls to do so. Instead of parsing entries with a non-empty ut_user, we
now look at LOGIN_PROCESS entries.
- use utility macros for CPU family/model checking
- limit Intel P6 quirk to pre-Nehalem models (taken from OpenSolaris)
- add AMD GartTblWkEn quirk for families 0Fh and 10h; I haven't experienced
any problems without the quirk but both Linux and OpenSolaris do this
- slightly re-arrange quirk code to provide for the future generalization
and separation of vendor-specific quirk functions
Reviewed by: jhb
MFC after: 1 week
Instead of constantly calling the mibII_idle function when the server is not busy
call the function only once every 10 seconds to avoid bsnmpd constantly doing
gettimeofday syscalls. Make the idle polling interval confugurable via
begemotIfDataPoll.
Reported and tested by: misho (at) aitbg (dot) com
Oked by: harti
MFC after: 1 week
One of the things I really want to do, is to get rid of the limitations
of our current utmp(5) mechanism:
- It only allows 8 byte TTY device names.
- The hostname only allows 16 bytes of storage.
I'm not a big fan of <utmpx.h>, but I think we should at least try to
add parts of it. Unfortunately we cannot implement <utmpx.h>, because we
miss various fields, such as ut_id, ut_pid, etc. The API provided by
libulog shares some similarities with <utmpx.h>, so it shouldn't be too
hard to port these applications eventually. In most simple cases, it
should just be a matter of removing the ulog_ prefix everywhere.
As a bonus, it also implements a function called ulog_login_pseudo(),
which allows unprivileged applications to write log entries, provided
they have a valid file descriptor to a pseudo-terminal master device.
libulog will allow a smoother transition to a new file format by adding
a library interface to deal with utmp/wtmp/lastlog files. I initially
thought about adding the functionality to libutil, but because I'm not
planning on keeping this library around forever, we'd better keep it
separated.
Next items on the todo list:
1. Port applications in the base system (and ports) to libulog, instead
of letting them use <utmp.h>.
2. Remove <utmp.h>, implement <utmpx.h> and reimplement this library on
top.
3. Port as many applications as possible back to <utmpx.h>.
long instead of an int when examining the results of select() to look for
RPC requests. Previously this routine would ignore RPC requests to sockets
whose file descriptor mod 64 was greater than 31 on a 64-bit platform.
PR: amd64/141130
Submitted by: liujb of array networks
MFC after: 3 days
table of functions.
This commit (which is heavily based on work done by Marta Carbone
in this year's GSOC project), removes the goto's and explicit
return from the inner switch(), so we will have a easier time when
putting the blocks into individual functions.
MFC after: 3 weeks
