vm_page_rename() from vm_object_backing_scan(). vm_page_rename()
also performs vm_page_deactivate() on pages in the cache queues,
making the removed vm_page_deactivate() redundant.
flags include INTR_MPSAFE. Put the flags in a common place so that
both isp_sbus && isp_pci DTRT.
In isp_mbxdma setup, drop any locks prior to calling things like
bus_dmatag_create. This gets rid of these obnoxious WITNESS messages
about 'sleeping with locks held' blah blah blah blah blah.
'single threading thread' when the last other thread suspends.
I had this code in there before but it seems to have been
accidentally deleted somewhere along the way. This would only affect
multithreaded processes.
Reviewed by: David Xu <bsddiy@yahoo.com>
pnbuf to increase the chances of detecting use of a free'd name buffer
if SAVENAME or SAVESTART wasn't passed in. Curiously, running with these
changes doesn't panic the kernel, and should.
of the inlines, like its cousin, m_free(). Also, make a small (first
step?) optimisation of m_free() to use the MBP_PERSIST{,ENT} interface
to hold the lock across frees when possible. The thing is that right
now, we can only do this easily for at most across one mbuf + one
cluster free, as the comment mentions (it also explains why). Anyway,
some basic tests revealed a 5-10% overall improvement. Some of the
results can be found here:
http://people.freebsd.org/~bmilekic/code/measure.txt
a ucred by itself as part of an nfs descriptor, then bzero's the ucred,
fails to initialize the mutex, etc. This is very bad, but I don't have
time to fix it right now. nfsd should instead hold a cred pointer,
and the credential should be properly initialized, probably from a
descendent of a kernel process credential.
non-default but reasonable values of hz this member overflowed,
breaking NFS over UDP.
Also, as long as I'm plowing up struct sockbuf ... Change certain
members from u_long/long to u_int/int in order to reduce wasted
space on 64-bit machines. This change was requested by Andrew
Gallatin.
Netstat and systat need to be rebuilt. I am incrementing
__FreeBSD_version in case any ports need to change.
is that grouped frees will be done as most often as possible without
dropping the cache lock in between. So, for the most part, they'll be
done without the lock being dropped. This is particularly true if you
have something that does a grouped m_getm() or m_getcl() (a cluster and
mbuf at the same time) - most likely getting the buffers from the
same per-CPU cache - and then frees them with m_free{,m}(). Unless
the buffers' underlying buckets were moved, the free will be done without
the lock getting dropped in between. So far, only m_free() has been
shown how to do this, and m_freem() will shortly follow.
Since I'm here, I also fixed a small (but mostly harmless) type-mismatch
introduced in the last commit.
has been specified through /boot/loader.conf as opposed to setting it
in /etc/sysctl.conf. Only PCMDIR_PLAY channel can be used as a parent
of virtual channel. Do not initialize a new vchan for a given physical
channel if other physical channel already has one created.
PR: 31597
Approved by: obrien (mentor)
disk devices. This fixes the problem with these ioctls returning
EINVAL for plain slice devices with no disklabel on them.
The patch incorporates improvements and style fixes from BDE.
Reviewed by: bde
Approved by: obrien (mentor)
do_sendfile(). This allows us to rearrange an if statement in order to
avoid doing an unnecesary call to vm_page_lock_queues(), and an attempt
at re-wiring the pages (which were wired in the vm_page_alloc() call).
Reviewed by: alc, jhb
