user/sven/linux.git/include/linux/cpumask.h, branch v3.10.44

cpumask: implement cpumask_parse()

2013-03-12T18:30:04Z

We have cpulist_parse() but not cpumask_parse(). Implement it using bitmap_parse(). bitmap_parse() is weird in that it takes @len for a string in kernel-memory which also is inconsistent with bitmap_parselist(). Make cpumask_parse() calculate the length and don't expose the inconsistency to cpumask users. Maybe we can fix up bitmap_parse() later. This will be used to expose workqueue cpumask knobs to userland via sysfs. Signed-off-by: Tejun Heo Cc: Rusty Russell

cpumask: cpulist_parse() comments correction

2012-07-26T23:59:42Z

As introduced in Rusty's commit 29c0177e6a4, the function has no parameter @len, so need to remove it from comments to avoid kernel-doc warning: alexs@debian:~/linux-next$ scripts/kernel-doc -man include/linux/cpumask.h | split-man.pl /tmp/man .... Warning(include/linux/cpumask.h:602): Excess function parameter 'len' description in 'cpulist_parse' and correct the function name in comments to cpulist_parse. Signed-off-by: Alex Shi Signed-off-by: Rusty Russell

cpumask: add a few comments of cpumask functions

2012-07-26T23:59:40Z

Current few cpumask functions' purposes are not quite clear. Stupid user like myself needs to dig into details for clear function purpose and return value. Add few explanation for them is helpful. Thanks for Srivatsa's comments and correction! Signed-off-by: Alex Shi Acked-by: KOSAKI Motohiro Signed-off-by: Rusty Russell

cpumask: remove old cpu_*_map.

2012-03-29T05:08:31Z

These are obsolete: cpu_*_mask provides (const) pointers. Signed-off-by: Rusty Russell

lib/cpumask.c: remove __any_online_cpu()

2012-03-29T00:14:35Z

__any_online_cpu() is not optimal and also unnecessary. So, replace its use by faster cpumask_* operations. Signed-off-by: Srivatsa S. Bhat Cc: Eric Dumazet Cc: Venkatesh Pallipadi Cc: Rusty Russell Cc: KOSAKI Motohiro Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

BUG: headers with BUG/BUG_ON etc. need linux/bug.h

2012-03-04T22:54:34Z

If a header file is making use of BUG, BUG_ON, BUILD_BUG_ON, or any other BUG variant in a static inline (i.e. not in a #define) then that header really should be including and not just expecting it to be implicitly present. We can make this change risk-free, since if the files using these headers didn't have exposure to linux/bug.h already, they would have been causing compile failures/warnings. Signed-off-by: Paul Gortmaker

cpumask: add cpumask_var_t documentation

2011-07-26T23:49:44Z

cpumask_var_t has one notable difference from cpumask_t. Add the explanation. Signed-off-by: KOSAKI Motohiro Cc: Thiago Farina Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

bitmap, irq: add smp_affinity_list interface to /proc/irq

2011-05-25T15:39:45Z

Manually adjusting the smp_affinity for IRQ's becomes unwieldy when the cpu count is large. Setting smp affinity to cpus 256 to 263 would be: echo 000000ff,00000000,00000000,00000000,00000000,00000000,00000000,00000000 > smp_affinity instead of: echo 256-263 > smp_affinity_list Think about what it looks like for cpus around say, 4088 to 4095. We already have many alternate "list" interfaces: /sys/devices/system/cpu/cpuX/indexY/shared_cpu_list /sys/devices/system/cpu/cpuX/topology/thread_siblings_list /sys/devices/system/cpu/cpuX/topology/core_siblings_list /sys/devices/system/node/nodeX/cpulist /sys/devices/pci***/***/local_cpulist Add a companion interface, smp_affinity_list to use cpu lists instead of cpu maps. This conforms to other companion interfaces where both a map and a list interface exists. This required adding a bitmap_parselist_user() function in a manner similar to the bitmap_parse_user() function. [akpm@linux-foundation.org: make __bitmap_parselist() static] Signed-off-by: Mike Travis Cc: Thomas Gleixner Cc: Jack Steiner Cc: Lee Schermerhorn Cc: Andy Shevchenko Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

cpumask: let num_*_cpus() function always return unsigned values

2010-03-06T19:26:29Z

Dependent on CONFIG_SMP the num_*_cpus() functions return unsigned or signed values. Let them always return unsigned values to avoid strange casts. Fixes at least one warning: kernel/kprobes.c: In function 'register_kretprobe': kernel/kprobes.c:1038: warning: comparison of distinct pointer types lacks a cast Signed-off-by: Heiko Carstens Cc: Heiko Carstens Cc: Ananth N Mavinakayanahalli Cc: Masami Hiramatsu Cc: Ingo Molnar Cc: Rusty Russell Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

rcu: Accelerate grace period if last non-dynticked CPU

2010-02-25T09:34:55Z

Currently, rcu_needs_cpu() simply checks whether the current CPU has an outstanding RCU callback, which means that the last CPU to go into dyntick-idle mode might wait a few ticks for the relevant grace periods to complete. However, if all the other CPUs are in dyntick-idle mode, and if this CPU is in a quiescent state (which it is for RCU-bh and RCU-sched any time that we are considering going into dyntick-idle mode), then the grace period is instantly complete. This patch therefore repeatedly invokes the RCU grace-period machinery in order to force any needed grace periods to complete quickly. It does so a limited number of times in order to prevent starvation by an RCU callback function that might pass itself to call_rcu(). However, if any CPU other than the current one is not in dyntick-idle mode, fall back to simply checking (with fix to bug noted by Lai Jiangshan). Also, take advantage of last grace-period forcing, the opportunity to do so noted by Steve Rostedt. And apply simplified #ifdef condition suggested by Frederic Weisbecker. Signed-off-by: Paul E. McKenney Cc: laijs@cn.fujitsu.com Cc: dipankar@in.ibm.com Cc: mathieu.desnoyers@polymtl.ca Cc: josh@joshtriplett.org Cc: dvhltc@us.ibm.com Cc: niv@us.ibm.com Cc: peterz@infradead.org Cc: rostedt@goodmis.org Cc: Valdis.Kletnieks@vt.edu Cc: dhowells@redhat.com LKML-Reference: <1266887105-1528-15-git-send-email-paulmck@linux.vnet.ibm.com> Signed-off-by: Ingo Molnar