Hi, As Peter pointed out the conversion to swait in completion is not so simple. For the time being I drop it and look at them later again. The main reason is that complete_all() can be called from hard-irq/atomic context and we can't use swake_up_all() because that function wants to run with IRQs enabled. If we can ensure that all callers of complete_all() are running under normal context for -rt.
In this version I tried to weed out all obvious typos for the different platforms which I missed in v1. These patches are against tip/master e6f195fd5c80214c5a4f139ee28798e66e20aa8f also available as git tree: git://git.kernel.org/pub/scm/linux/kernel/git/wagi/linux.git tip-swait cheers, daniel [I got the numbering wrong in v1, so instead 'PATCH v1' you find it as 'PATCH v0' series] 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. v1: http://lwn.net/Articles/656942/ v0: http://lwn.net/Articles/653586/ Cc: "Paul E. McKenney" <paul...@linux.vnet.ibm.com> Cc: Ingo Molnar <mi...@redhat.com> Cc: Josh Triplett <j...@joshtriplett.org> Cc: Lai Jiangshan <la...@cn.fujitsu.com> Cc: Marcelo Tosatti <mtosa...@redhat.com> Cc: Mathieu Desnoyers <mathieu.desnoy...@efficios.com> Cc: Paolo Bonzini <pbonz...@redhat.com> Cc: Paul E. McKenney <paul...@linux.vnet.ibm.com> Cc: Paul Gortmaker <paul.gortma...@windriver.com> Cc: Peter Zijlstra <pet...@infradead.org> Cc: Sebastian Andrzej Siewior <bige...@linutronix.de> Cc: Steven Rostedt <rost...@goodmis.org> Cc: Thomas Gleixner <t...@linutronix.de> Cc: linux-kernel@vger.kernel.org Daniel Wagner (1): rcu: Do not call swake_up_all with rnp->lock holding 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 arch/arm/kvm/arm.c | 4 +- arch/arm/kvm/psci.c | 4 +- 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 | 17 ++-- kernel/rcu/tree.h | 10 ++- kernel/rcu/tree_plugin.h | 32 ++++--- kernel/sched/Makefile | 2 +- kernel/sched/swait.c | 122 +++++++++++++++++++++++++ virt/kvm/async_pf.c | 4 +- virt/kvm/kvm_main.c | 17 ++-- 16 files changed, 370 insertions(+), 62 deletions(-) create mode 100644 include/linux/swait.h create mode 100644 kernel/sched/swait.c -- 2.4.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
