Messages in this thread | | | Date | Mon, 10 Feb 2014 12:30:19 +0100 | From | Heiko Carstens <> | Subject | Re: [PATCH RFC/RFT v2 3/8] s390: move cacheinfo sysfs to generic cacheinfo infrastructure |
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On Fri, Feb 07, 2014 at 04:49:18PM +0000, Sudeep Holla wrote: > From: Sudeep Holla <sudeep.holla@arm.com> > > This patch removes the redundant sysfs cacheinfo code by making use of > the newly introduced generic cacheinfo infrastructure. > > Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
[...]
> -static ssize_t shared_cpu_map_func(struct kobject *kobj, int type, char *buf) > -{ > - struct cache_index_dir *index; > - int len; > + this_leaf->level = level + 1; > + this_leaf->type = type; > + this_leaf->coherency_line_size = ecag(EXTRACT_LINE_SIZE, level, ti); > + this_leaf->ways_of_associativity = ecag(EXTRACT_ASSOCIATIVITY, > + level, ti); > + this_leaf->size = ecag(EXTRACT_SIZE, level, ti); > + if (private) > + cpumask_set_cpu(cpu, &this_leaf->shared_cpu_map); > + else /* System wide */ > + cpumask_copy(&this_leaf->shared_cpu_map, cpu_online_mask);
FWIW, this also seems to be wrong: on s390 we only expose cpu private caches via sysfs. Shared caches are not exposed (and simply saying they are system wide would be wrong). Please have a look at these two commits which should describe why things are as they are on s390:
881730ad365130f64b5c70c40904b04eb3b79de3 "s390/cache: expose cpu cache topology via sysfs" 6668022c7bde3fdc96d3d257294a7216c7a46829 "s390/cache: add cpu cache information to /proc/cpuinfo"
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