git: kernel - Major MPSAFE Infrastructure 2
commit c57248528eb11d4c5d4fadfdac323e3d4eb3d424
Author: Matthew Dillon <dillon@apollo.backplane.com>
Date: Fri Aug 27 01:55:46 2010 -0700
kernel - Major MPSAFE Infrastructure 2
* Refactor buffer cache code which assumes content-stable data across
a non-blocking BUF_LOCK(). This is no longer true. The content must
be reverified after the BUF_LOCK() succeeds.
* Make setting and clearing B_DELWRI atomic with buffer reassignment.
* Release cached mplock when looping in the scheduler and run
check_splz() to avoid livelocking cpus.
* Refactor the mplock contention handling code to handle both the mplock
and token contention. Generate a 2uS delay for all but one cpu to
try to avoid livelocks.
* Do not splz() from inside a spinlock, it will just panic.
* Fix the token description field for 'systat -pv 1'.
* Optimize MP_LOCK macros a bit.
Summary of changes:
sys/kern/kern_mplock.c | 8 +-
sys/kern/kern_spinlock.c | 1 -
sys/kern/kern_umtx.c | 2 +
sys/kern/lwkt_thread.c | 77 ++++++++++---
sys/kern/lwkt_token.c | 1 +
sys/kern/vfs_bio.c | 126 ++++++++++++----------
sys/kern/vfs_subr.c | 176 +++++++++++++++++++----------
sys/kern/vfs_vm.c | 87 +++++++++------
sys/platform/pc32/i386/machdep.c | 18 ++-
sys/platform/pc32/isa/clock.c | 1 +
sys/platform/pc64/isa/clock.c | 1 +
sys/platform/pc64/x86_64/machdep.c | 9 +-
sys/platform/vkernel/i386/cpu_regs.c | 38 +++++--
sys/platform/vkernel64/x86_64/cpu_regs.c | 23 +++-
sys/sys/mplock2.h | 28 +++--
15 files changed, 387 insertions(+), 209 deletions(-)
http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/c57248528eb11d4c5d4fadfdac323e3d4eb3d424
--
DragonFly BSD source repository