From: Thomas Gleixner <tglx@linutronix.de> To: LKML <linux-kernel@vger.kernel.org> Cc: Peter Zijlstra <peterz@infradead.org>, Linus Torvalds <torvalds@linux-foundation.org>, Ingo Molnar <mingo@kernel.org>, Will Deacon <will@kernel.org>, "Paul E . McKenney" <paulmck@kernel.org>, Joel Fernandes <joel@joelfernandes.org>, Steven Rostedt <rostedt@goodmis.org>, Randy Dunlap <rdunlap@infradead.org>, Sebastian Andrzej Siewior <bigeasy@linutronix.de>, Logan Gunthorpe <logang@deltatee.com>, Kurt Schwemmer <kurt.schwemmer@microsemi.com>, Bjorn Helgaas <bhelgaas@google.com>, linux-pci@vger.kernel.org, Felipe Balbi <balbi@kernel.org>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, linux-usb@vger.kernel.org, Kalle Valo <kvalo@codeaurora.org>, "David S. Miller" <davem@davemloft.net>, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, Oleg Nesterov <oleg@redhat.com>, Davidlohr Bueso <dave@stgolabs.net>, Michael Ellerman <mpe@ellerman.id.au>, Arnd Bergmann <arnd@arndb.de>, linuxppc-dev@lists.ozlabs.org Subject: [patch V2 09/15] timekeeping: Split jiffies seqlock Date: Wed, 18 Mar 2020 21:43:11 +0100 [thread overview] Message-ID: <20200318204408.319891308@linutronix.de> (raw) In-Reply-To: 20200318204302.693307984@linutronix.de From: Thomas Gleixner <tglx@linutronix.de> seqlock consists of a sequence counter and a spinlock_t which is used to serialize the writers. spinlock_t is substituted by a "sleeping" spinlock on PREEMPT_RT enabled kernels which breaks the usage in the timekeeping code as the writers are executed in hard interrupt and therefore non-preemptible context even on PREEMPT_RT. The spinlock in seqlock cannot be unconditionally replaced by a raw_spinlock_t as many seqlock users have nesting spinlock sections or other code which is not suitable to run in truly atomic context on RT. Instead of providing a raw_seqlock API for a single use case, open code the seqlock for the jiffies use case and implement it with a raw_spinlock_t and a sequence counter. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> --- kernel/time/jiffies.c | 7 ++++--- kernel/time/tick-common.c | 10 ++++++---- kernel/time/tick-sched.c | 19 ++++++++++++------- kernel/time/timekeeping.c | 6 ++++-- kernel/time/timekeeping.h | 3 ++- 5 files changed, 28 insertions(+), 17 deletions(-) --- a/kernel/time/jiffies.c +++ b/kernel/time/jiffies.c @@ -58,7 +58,8 @@ static struct clocksource clocksource_ji .max_cycles = 10, }; -__cacheline_aligned_in_smp DEFINE_SEQLOCK(jiffies_lock); +__cacheline_aligned_in_smp DEFINE_RAW_SPINLOCK(jiffies_lock); +__cacheline_aligned_in_smp seqcount_t jiffies_seq; #if (BITS_PER_LONG < 64) u64 get_jiffies_64(void) @@ -67,9 +68,9 @@ u64 get_jiffies_64(void) u64 ret; do { - seq = read_seqbegin(&jiffies_lock); + seq = read_seqcount_begin(&jiffies_seq); ret = jiffies_64; - } while (read_seqretry(&jiffies_lock, seq)); + } while (read_seqcount_retry(&jiffies_seq, seq)); return ret; } EXPORT_SYMBOL(get_jiffies_64); --- a/kernel/time/tick-common.c +++ b/kernel/time/tick-common.c @@ -84,13 +84,15 @@ int tick_is_oneshot_available(void) static void tick_periodic(int cpu) { if (tick_do_timer_cpu == cpu) { - write_seqlock(&jiffies_lock); + raw_spin_lock(&jiffies_lock); + write_seqcount_begin(&jiffies_seq); /* Keep track of the next tick event */ tick_next_period = ktime_add(tick_next_period, tick_period); do_timer(1); - write_sequnlock(&jiffies_lock); + write_seqcount_end(&jiffies_seq); + raw_spin_unlock(&jiffies_lock); update_wall_time(); } @@ -162,9 +164,9 @@ void tick_setup_periodic(struct clock_ev ktime_t next; do { - seq = read_seqbegin(&jiffies_lock); + seq = read_seqcount_begin(&jiffies_seq); next = tick_next_period; - } while (read_seqretry(&jiffies_lock, seq)); + } while (read_seqcount_retry(&jiffies_seq, seq)); clockevents_switch_state(dev, CLOCK_EVT_STATE_ONESHOT); --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -65,7 +65,8 @@ static void tick_do_update_jiffies64(kti return; /* Reevaluate with jiffies_lock held */ - write_seqlock(&jiffies_lock); + raw_spin_lock(&jiffies_lock); + write_seqcount_begin(&jiffies_seq); delta = ktime_sub(now, last_jiffies_update); if (delta >= tick_period) { @@ -91,10 +92,12 @@ static void tick_do_update_jiffies64(kti /* Keep the tick_next_period variable up to date */ tick_next_period = ktime_add(last_jiffies_update, tick_period); } else { - write_sequnlock(&jiffies_lock); + write_seqcount_end(&jiffies_seq); + raw_spin_unlock(&jiffies_lock); return; } - write_sequnlock(&jiffies_lock); + write_seqcount_end(&jiffies_seq); + raw_spin_unlock(&jiffies_lock); update_wall_time(); } @@ -105,12 +108,14 @@ static ktime_t tick_init_jiffy_update(vo { ktime_t period; - write_seqlock(&jiffies_lock); + raw_spin_lock(&jiffies_lock); + write_seqcount_begin(&jiffies_seq); /* Did we start the jiffies update yet ? */ if (last_jiffies_update == 0) last_jiffies_update = tick_next_period; period = last_jiffies_update; - write_sequnlock(&jiffies_lock); + write_seqcount_end(&jiffies_seq); + raw_spin_unlock(&jiffies_lock); return period; } @@ -676,10 +681,10 @@ static ktime_t tick_nohz_next_event(stru /* Read jiffies and the time when jiffies were updated last */ do { - seq = read_seqbegin(&jiffies_lock); + seq = read_seqcount_begin(&jiffies_seq); basemono = last_jiffies_update; basejiff = jiffies; - } while (read_seqretry(&jiffies_lock, seq)); + } while (read_seqcount_retry(&jiffies_seq, seq)); ts->last_jiffies = basejiff; ts->timer_expires_base = basemono; --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c @@ -2397,8 +2397,10 @@ EXPORT_SYMBOL(hardpps); */ void xtime_update(unsigned long ticks) { - write_seqlock(&jiffies_lock); + raw_spin_lock(&jiffies_lock); + write_seqcount_begin(&jiffies_seq); do_timer(ticks); - write_sequnlock(&jiffies_lock); + write_seqcount_end(&jiffies_seq); + raw_spin_unlock(&jiffies_lock); update_wall_time(); } --- a/kernel/time/timekeeping.h +++ b/kernel/time/timekeeping.h @@ -25,7 +25,8 @@ static inline void sched_clock_resume(vo extern void do_timer(unsigned long ticks); extern void update_wall_time(void); -extern seqlock_t jiffies_lock; +extern raw_spinlock_t jiffies_lock; +extern seqcount_t jiffies_seq; #define CS_NAME_LEN 32
WARNING: multiple messages have this Message-ID (diff)
From: Thomas Gleixner <tglx@linutronix.de> To: LKML <linux-kernel@vger.kernel.org> Cc: Randy Dunlap <rdunlap@infradead.org>, Peter Zijlstra <peterz@infradead.org>, linux-pci@vger.kernel.org, Sebastian Andrzej Siewior <bigeasy@linutronix.de>, Joel Fernandes <joel@joelfernandes.org>, Will Deacon <will@kernel.org>, Ingo Molnar <mingo@kernel.org>, Davidlohr Bueso <dave@stgolabs.net>, Arnd Bergmann <arnd@arndb.de>, Logan Gunthorpe <logang@deltatee.com>, "Paul E . McKenney" <paulmck@kernel.org>, linuxppc-dev@lists.ozlabs.org, Steven Rostedt <rostedt@goodmis.org>, Bjorn Helgaas <bhelgaas@google.com>, Kurt Schwemmer <kurt.schwemmer@microsemi.com>, Kalle Valo <kvalo@codeaurora.org>, Felipe Balbi <balbi@kernel.org>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, linux-usb@vger.kernel.org, linux-wireless@vger.kernel.org, Oleg Nesterov <oleg@redhat.com>, netdev@vger.kernel.org, Linus Torvalds <torvalds@linux-foundation.org>, "David S. Miller" <davem@davemloft.net> Subject: [patch V2 09/15] timekeeping: Split jiffies seqlock Date: Wed, 18 Mar 2020 21:43:11 +0100 [thread overview] Message-ID: <20200318204408.319891308@linutronix.de> (raw) In-Reply-To: 20200318204302.693307984@linutronix.de From: Thomas Gleixner <tglx@linutronix.de> seqlock consists of a sequence counter and a spinlock_t which is used to serialize the writers. spinlock_t is substituted by a "sleeping" spinlock on PREEMPT_RT enabled kernels which breaks the usage in the timekeeping code as the writers are executed in hard interrupt and therefore non-preemptible context even on PREEMPT_RT. The spinlock in seqlock cannot be unconditionally replaced by a raw_spinlock_t as many seqlock users have nesting spinlock sections or other code which is not suitable to run in truly atomic context on RT. Instead of providing a raw_seqlock API for a single use case, open code the seqlock for the jiffies use case and implement it with a raw_spinlock_t and a sequence counter. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> --- kernel/time/jiffies.c | 7 ++++--- kernel/time/tick-common.c | 10 ++++++---- kernel/time/tick-sched.c | 19 ++++++++++++------- kernel/time/timekeeping.c | 6 ++++-- kernel/time/timekeeping.h | 3 ++- 5 files changed, 28 insertions(+), 17 deletions(-) --- a/kernel/time/jiffies.c +++ b/kernel/time/jiffies.c @@ -58,7 +58,8 @@ static struct clocksource clocksource_ji .max_cycles = 10, }; -__cacheline_aligned_in_smp DEFINE_SEQLOCK(jiffies_lock); +__cacheline_aligned_in_smp DEFINE_RAW_SPINLOCK(jiffies_lock); +__cacheline_aligned_in_smp seqcount_t jiffies_seq; #if (BITS_PER_LONG < 64) u64 get_jiffies_64(void) @@ -67,9 +68,9 @@ u64 get_jiffies_64(void) u64 ret; do { - seq = read_seqbegin(&jiffies_lock); + seq = read_seqcount_begin(&jiffies_seq); ret = jiffies_64; - } while (read_seqretry(&jiffies_lock, seq)); + } while (read_seqcount_retry(&jiffies_seq, seq)); return ret; } EXPORT_SYMBOL(get_jiffies_64); --- a/kernel/time/tick-common.c +++ b/kernel/time/tick-common.c @@ -84,13 +84,15 @@ int tick_is_oneshot_available(void) static void tick_periodic(int cpu) { if (tick_do_timer_cpu == cpu) { - write_seqlock(&jiffies_lock); + raw_spin_lock(&jiffies_lock); + write_seqcount_begin(&jiffies_seq); /* Keep track of the next tick event */ tick_next_period = ktime_add(tick_next_period, tick_period); do_timer(1); - write_sequnlock(&jiffies_lock); + write_seqcount_end(&jiffies_seq); + raw_spin_unlock(&jiffies_lock); update_wall_time(); } @@ -162,9 +164,9 @@ void tick_setup_periodic(struct clock_ev ktime_t next; do { - seq = read_seqbegin(&jiffies_lock); + seq = read_seqcount_begin(&jiffies_seq); next = tick_next_period; - } while (read_seqretry(&jiffies_lock, seq)); + } while (read_seqcount_retry(&jiffies_seq, seq)); clockevents_switch_state(dev, CLOCK_EVT_STATE_ONESHOT); --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -65,7 +65,8 @@ static void tick_do_update_jiffies64(kti return; /* Reevaluate with jiffies_lock held */ - write_seqlock(&jiffies_lock); + raw_spin_lock(&jiffies_lock); + write_seqcount_begin(&jiffies_seq); delta = ktime_sub(now, last_jiffies_update); if (delta >= tick_period) { @@ -91,10 +92,12 @@ static void tick_do_update_jiffies64(kti /* Keep the tick_next_period variable up to date */ tick_next_period = ktime_add(last_jiffies_update, tick_period); } else { - write_sequnlock(&jiffies_lock); + write_seqcount_end(&jiffies_seq); + raw_spin_unlock(&jiffies_lock); return; } - write_sequnlock(&jiffies_lock); + write_seqcount_end(&jiffies_seq); + raw_spin_unlock(&jiffies_lock); update_wall_time(); } @@ -105,12 +108,14 @@ static ktime_t tick_init_jiffy_update(vo { ktime_t period; - write_seqlock(&jiffies_lock); + raw_spin_lock(&jiffies_lock); + write_seqcount_begin(&jiffies_seq); /* Did we start the jiffies update yet ? */ if (last_jiffies_update == 0) last_jiffies_update = tick_next_period; period = last_jiffies_update; - write_sequnlock(&jiffies_lock); + write_seqcount_end(&jiffies_seq); + raw_spin_unlock(&jiffies_lock); return period; } @@ -676,10 +681,10 @@ static ktime_t tick_nohz_next_event(stru /* Read jiffies and the time when jiffies were updated last */ do { - seq = read_seqbegin(&jiffies_lock); + seq = read_seqcount_begin(&jiffies_seq); basemono = last_jiffies_update; basejiff = jiffies; - } while (read_seqretry(&jiffies_lock, seq)); + } while (read_seqcount_retry(&jiffies_seq, seq)); ts->last_jiffies = basejiff; ts->timer_expires_base = basemono; --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c @@ -2397,8 +2397,10 @@ EXPORT_SYMBOL(hardpps); */ void xtime_update(unsigned long ticks) { - write_seqlock(&jiffies_lock); + raw_spin_lock(&jiffies_lock); + write_seqcount_begin(&jiffies_seq); do_timer(ticks); - write_sequnlock(&jiffies_lock); + write_seqcount_end(&jiffies_seq); + raw_spin_unlock(&jiffies_lock); update_wall_time(); } --- a/kernel/time/timekeeping.h +++ b/kernel/time/timekeeping.h @@ -25,7 +25,8 @@ static inline void sched_clock_resume(vo extern void do_timer(unsigned long ticks); extern void update_wall_time(void); -extern seqlock_t jiffies_lock; +extern raw_spinlock_t jiffies_lock; +extern seqcount_t jiffies_seq; #define CS_NAME_LEN 32
next prev parent reply other threads:[~2020-03-18 20:47 UTC|newest] Thread overview: 148+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-03-18 20:43 [patch V2 00/15] Lock ordering documentation and annotation for lockdep Thomas Gleixner 2020-03-18 20:43 ` Thomas Gleixner 2020-03-18 20:43 ` [patch V2 01/15] PCI/switchtec: Fix init_completion race condition with poll_wait() Thomas Gleixner 2020-03-18 20:43 ` Thomas Gleixner 2020-03-18 21:25 ` Bjorn Helgaas 2020-03-18 21:25 ` Bjorn Helgaas 2020-03-18 20:43 ` [patch V2 02/15] pci/switchtec: Replace completion wait queue usage for poll Thomas Gleixner 2020-03-18 20:43 ` Thomas Gleixner 2020-03-18 21:26 ` Bjorn Helgaas 2020-03-18 21:26 ` Bjorn Helgaas 2020-03-18 22:11 ` Logan Gunthorpe 2020-03-18 22:11 ` Logan Gunthorpe 2020-03-18 20:43 ` [patch V2 03/15] usb: gadget: Use completion interface instead of open coding it Thomas Gleixner 2020-03-18 20:43 ` Thomas Gleixner 2020-03-19 8:41 ` Greg Kroah-Hartman 2020-03-19 8:41 ` Greg Kroah-Hartman 2020-03-18 20:43 ` [patch V2 04/15] orinoco_usb: Use the regular completion interfaces Thomas Gleixner 2020-03-18 20:43 ` Thomas Gleixner 2020-03-19 8:40 ` Greg Kroah-Hartman 2020-03-19 8:40 ` Greg Kroah-Hartman 2020-03-18 20:43 ` [patch V2 05/15] acpi: Remove header dependency Thomas Gleixner 2020-03-18 20:43 ` Thomas Gleixner 2020-03-18 20:43 ` [patch V2 06/15] rcuwait: Add @state argument to rcuwait_wait_event() Thomas Gleixner 2020-03-18 20:43 ` Thomas Gleixner 2020-03-20 5:36 ` Davidlohr Bueso 2020-03-20 5:36 ` Davidlohr Bueso 2020-03-20 8:45 ` Sebastian Andrzej Siewior 2020-03-20 8:45 ` Sebastian Andrzej Siewior 2020-03-20 8:58 ` Davidlohr Bueso 2020-03-20 8:58 ` Davidlohr Bueso 2020-03-20 9:48 ` [PATCH 0/5] Remove mm.h from arch/*/include/asm/uaccess.h Sebastian Andrzej Siewior 2020-03-20 9:48 ` Sebastian Andrzej Siewior 2020-03-20 9:48 ` [PATCH 1/5] nds32: Remove mm.h from asm/uaccess.h Sebastian Andrzej Siewior 2020-03-20 9:48 ` Sebastian Andrzej Siewior 2020-03-20 9:48 ` [PATCH 2/5] csky: " Sebastian Andrzej Siewior 2020-03-20 9:48 ` Sebastian Andrzej Siewior 2020-03-21 11:24 ` Guo Ren 2020-03-21 11:24 ` Guo Ren 2020-03-21 12:08 ` Thomas Gleixner 2020-03-21 12:08 ` Thomas Gleixner 2020-03-21 14:11 ` Guo Ren 2020-03-21 14:11 ` Guo Ren 2020-03-20 9:48 ` [PATCH 3/5] hexagon: " Sebastian Andrzej Siewior 2020-03-20 9:48 ` Sebastian Andrzej Siewior 2020-03-20 9:48 ` [PATCH 4/5] ia64: " Sebastian Andrzej Siewior 2020-03-20 9:48 ` Sebastian Andrzej Siewior 2020-03-20 9:48 ` Sebastian Andrzej Siewior 2020-03-20 9:48 ` [PATCH 5/5] microblaze: " Sebastian Andrzej Siewior 2020-03-20 9:48 ` Sebastian Andrzej Siewior 2020-03-18 20:43 ` [patch V2 07/15] powerpc/ps3: Convert half completion to rcuwait Thomas Gleixner 2020-03-18 20:43 ` Thomas Gleixner 2020-03-19 9:00 ` Sebastian Andrzej Siewior 2020-03-19 9:00 ` Sebastian Andrzej Siewior 2020-03-19 9:18 ` Peter Zijlstra 2020-03-19 9:18 ` Peter Zijlstra 2020-03-19 9:21 ` Davidlohr Bueso 2020-03-19 9:21 ` Davidlohr Bueso 2020-03-19 10:04 ` Christoph Hellwig 2020-03-19 10:04 ` Christoph Hellwig 2020-03-19 10:26 ` Sebastian Andrzej Siewior 2020-03-19 10:26 ` Sebastian Andrzej Siewior 2020-03-20 0:01 ` Geoff Levand 2020-03-20 0:01 ` Geoff Levand 2020-03-20 0:45 ` Michael Ellerman 2020-03-20 0:45 ` Michael Ellerman 2020-03-21 10:41 ` Thomas Gleixner 2020-03-21 10:41 ` Thomas Gleixner 2020-03-18 20:43 ` [patch V2 08/15] Documentation: Add lock ordering and nesting documentation Thomas Gleixner 2020-03-18 20:43 ` Thomas Gleixner 2020-03-18 22:31 ` Paul E. McKenney 2020-03-18 22:31 ` Paul E. McKenney 2020-03-19 18:02 ` Thomas Gleixner 2020-03-19 18:02 ` Thomas Gleixner 2020-03-20 16:01 ` Paul E. McKenney 2020-03-20 16:01 ` Paul E. McKenney 2020-03-20 19:51 ` Thomas Gleixner 2020-03-20 19:51 ` Thomas Gleixner 2020-03-20 21:02 ` Paul E. McKenney 2020-03-20 21:02 ` Paul E. McKenney 2020-03-20 22:36 ` Thomas Gleixner 2020-03-20 22:36 ` Thomas Gleixner 2020-03-21 2:29 ` Paul E. McKenney 2020-03-21 2:29 ` Paul E. McKenney 2020-03-21 10:26 ` Thomas Gleixner 2020-03-21 10:26 ` Thomas Gleixner 2020-03-21 17:23 ` Paul E. McKenney 2020-03-21 17:23 ` Paul E. McKenney 2020-03-19 8:51 ` Davidlohr Bueso 2020-03-19 8:51 ` Davidlohr Bueso 2020-03-19 15:04 ` Jonathan Corbet 2020-03-19 15:04 ` Jonathan Corbet 2020-03-19 18:04 ` Thomas Gleixner 2020-03-19 18:04 ` Thomas Gleixner 2020-03-21 21:21 ` Joel Fernandes 2020-03-21 21:21 ` Joel Fernandes 2020-03-21 21:49 ` Thomas Gleixner 2020-03-21 21:49 ` Thomas Gleixner 2020-03-22 1:36 ` Joel Fernandes 2020-03-22 1:36 ` Joel Fernandes 2020-03-18 20:43 ` Thomas Gleixner [this message] 2020-03-18 20:43 ` [patch V2 09/15] timekeeping: Split jiffies seqlock Thomas Gleixner 2020-03-18 20:43 ` [patch V2 10/15] sched/swait: Prepare usage in completions Thomas Gleixner 2020-03-18 20:43 ` Thomas Gleixner 2020-03-18 20:43 ` [patch V2 11/15] completion: Use simple wait queues Thomas Gleixner 2020-03-18 20:43 ` Thomas Gleixner 2020-03-18 22:28 ` Logan Gunthorpe 2020-03-18 22:28 ` Logan Gunthorpe 2020-03-19 0:33 ` Joel Fernandes 2020-03-19 0:33 ` Joel Fernandes 2020-03-19 0:44 ` Thomas Gleixner 2020-03-19 0:44 ` Thomas Gleixner 2020-03-19 8:42 ` Greg Kroah-Hartman 2020-03-19 8:42 ` Greg Kroah-Hartman 2020-03-19 17:12 ` Linus Torvalds 2020-03-19 17:12 ` Linus Torvalds 2020-03-19 23:25 ` Julian Calaby 2020-03-19 23:25 ` Julian Calaby 2020-03-20 6:59 ` Christoph Hellwig 2020-03-20 6:59 ` Christoph Hellwig 2020-03-20 9:01 ` Davidlohr Bueso 2020-03-20 9:01 ` Davidlohr Bueso 2020-03-18 20:43 ` [patch V2 13/15] lockdep: Add hrtimer context tracing bits Thomas Gleixner 2020-03-18 20:43 ` [patch V2 14/15] lockdep: Annotate irq_work Thomas Gleixner 2020-03-18 20:43 ` [patch V2 15/15] lockdep: Add posixtimer context tracing bits Thomas Gleixner 2020-03-20 8:50 ` [patch V2 00/15] Lock ordering documentation and annotation for lockdep Davidlohr Bueso 2020-03-20 8:50 ` Davidlohr Bueso 2020-03-20 8:55 ` [PATCH 16/15] rcuwait: Get rid of stale name comment Davidlohr Bueso 2020-03-20 8:55 ` Davidlohr Bueso 2020-03-20 8:55 ` [PATCH 17/15] rcuwait: Inform rcuwait_wake_up() users if a wakeup was attempted Davidlohr Bueso 2020-03-20 8:55 ` Davidlohr Bueso 2020-03-20 9:13 ` Sebastian Andrzej Siewior 2020-03-20 9:13 ` Sebastian Andrzej Siewior 2020-03-20 10:44 ` Peter Zijlstra 2020-03-20 10:44 ` Peter Zijlstra 2020-03-20 8:55 ` [PATCH 18/15] kvm: Replace vcpu->swait with rcuwait Davidlohr Bueso 2020-03-20 8:55 ` Davidlohr Bueso 2020-03-20 11:20 ` Paolo Bonzini 2020-03-20 11:20 ` Paolo Bonzini 2020-03-20 12:54 ` Peter Zijlstra 2020-03-20 12:54 ` Peter Zijlstra 2020-03-22 16:33 ` Davidlohr Bueso 2020-03-22 16:33 ` Davidlohr Bueso 2020-03-22 22:32 ` Peter Zijlstra 2020-03-22 22:32 ` Peter Zijlstra 2020-03-20 8:55 ` [PATCH 19/15] sched/swait: Reword some of the main description Davidlohr Bueso 2020-03-20 8:55 ` Davidlohr Bueso 2020-03-20 9:19 ` Sebastian Andrzej Siewior 2020-03-20 9:19 ` Sebastian Andrzej Siewior
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