and getcwd():
- push vnode locking back as far as possible.
- do most lookups directly in the namecache, avoiding vnode locks & refs.
- don't block new refs to vnodes across VOP_INACTIVE().
- get shared locks for VOP_LOOKUP() if the file system supports it.
- correct lock types for VOP_ACCESS() / VOP_GETATTR() in a few places.
Possible future enhancements:
- make the lookups lockless.
- support dotdot lookups by being lockless and inferring absence of chroot.
- maybe make it work for layered file systems.
- avoid vnode references at the root & cwd.
identifier uniquely identifies an LWP across the entire system, and will
be used in future improvements in user-space synchronization primitives.
(Test disabled and libc stub not included intentionally so as to avoid
multiple libc version bumps.)
to avoid stealing back the LWP, remember the target CPU and avoid it.
- sched_preempted(): only choose a totally idle CPU; in the interests of
overall throughput it's better to make use of SMT / slow CPUs.
/netbsd/modules respectively instead of /netbsd and
/stand/<arch>/<version>/modules. This is only supported for x86,
and is turned off by default. To try it, add KERNEL_DIR=yes in your
/mk.conf and install a system from that build.
as long as netfront in DomU is configured to fill the checksum
documentation will be updated to recommend how the flags should be setup
on each side of the xennet(4)/xvif(4) pair
libraries from other DSO's. For example in /usr/bin/passwd:
ld: krb5_passwd.o: undefined reference to symbol \
'UI_UTIL_read_pw_string@@OPENSSL_1_1_0'
ld: /usr/obj/amd64-x86_64/release/lib/libcrypto.so.14: error adding symbols: \
DSO missing from command line
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