Hi,
New week, new version!
v5 fixes the wrong API usage in ("rcu: Do not call
rcu_nocb_gp_cleanup() while holding rnp->lock") as reported by Boqun.
The compile time assertion in previous version (patch #2) didn't hold
at all. So I tried to macrofying most of the swait/wait API which
looks really ugly and therefore isn't really an option[1]. Instead
'-Werror=incompatible-pointer-types' is introduced in patch 2. I
compiled s390, arm, powerpc, mips and alpha with allyesconfig, and all
is fine. It doesn't look like that this will trigger a lot of new
errors.
The rest has not changed. Happy reviewing. I wouldn't mind acks,
reviewed or even sobs :)
These patches are against
tip/sched/core e73e85f0593832aa583b252f9a16cf90ed6d30fa
also available as git tree:
git://git.kernel.org/pub/scm/linux/kernel/git/wagi/linux.git tip-swait
cheers,
daniel
[1] https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1029072.html
changes since v4:
- replaced patch #2 which tried to force to compiler to
exit with an error by using compile time assertion type
check macros. Instead use -Werror=incompatible-pointer-types
to tell the compiler to barf loudly.
- fixed wrong API usage in patch 4 as reported by Boqun.
changes since v3
- rebased it on tip/sched/core (KVM bits have changed slightly)
- added compile time type check assertion
- added non lazy version of swake_up_locked()
changes since v2
- rebased again on tip/master. The patches apply
cleanly on v4.3-rc6 too.
- fixed up mips
- reordered patches to avoid lockdep warning when doing bissect.
- remove unnecessary initialization of rsp->rda in rcu_init_one().
changes since v1 (PATCH v0)
- rebased and fixed some typos found by cross building
for S390, ARM and powerpc. For some unknown reason didn't catch
them last time.
- dropped completion patches because it is not clear yet
how to handle complete_all() calls hard-irq/atomic contexts
and swake_up_all.
changes since v0 (RFC v0)
- promoted the series to PATCH state instead of RFC
- fixed a few fallouts with build all and some cross compilers
such ARM, PowerPC, S390.
- Added the simple waitqueue transformation for KVM from -rt
including some numbers requested by Paolo.
- Added a commit message to PeterZ's patch. Hope he likes it.
[I got the numbering wrong in v1, so instead 'PATCH v1' you find it
as 'PATCH v0' series]
v4: https://lwn.net/Articles/665655/
v3: https://lwn.net/Articles/661415/
v2: https://lwn.net/Articles/660628/
v1: https://lwn.net/Articles/656942/
v0: https://lwn.net/Articles/653586/
Daniel Wagner (2):
kbuild: Add option to turn incompatible pointer check into error
rcu: Do not call rcu_nocb_gp_cleanup() while holding rnp->lock
Marcelo Tosatti (1):
KVM: use simple waitqueue for vcpu->wq
Paul Gortmaker (1):
rcu: use simple wait queues where possible in rcutree
Peter Zijlstra (Intel) (1):
wait.[ch]: Introduce the simple waitqueue (swait) implementation
Makefile | 4 +
arch/arm/kvm/arm.c | 4 +-
arch/arm/kvm/psci.c | 4 +-
arch/mips/kvm/mips.c | 8 +-
arch/powerpc/include/asm/kvm_host.h | 4 +-
arch/powerpc/kvm/book3s_hv.c | 23 +++--
arch/s390/include/asm/kvm_host.h | 2 +-
arch/s390/kvm/interrupt.c | 8 +-
arch/x86/kvm/lapic.c | 6 +-
include/linux/kvm_host.h | 5 +-
include/linux/swait.h | 172 ++++++++++++++++++++++++++++++++++++
kernel/rcu/tree.c | 24 ++---
kernel/rcu/tree.h | 12 +--
kernel/rcu/tree_plugin.h | 32 ++++---
kernel/sched/Makefile | 2 +-
kernel/sched/swait.c | 123 ++++++++++++++++++++++++++
lib/Kconfig.debug | 7 ++
virt/kvm/async_pf.c | 4 +-
virt/kvm/kvm_main.c | 17 ++--
19 files changed, 390 insertions(+), 71 deletions(-)
create mode 100644 include/linux/swait.h
create mode 100644 kernel/sched/swait.c
--
2.4.3
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