linux/lib/percpu_counter.c, branch v2.6.26

mm: bdi: export BDI attributes in sysfs

2008-04-30T15:29:49Z

Provide a place in sysfs (/sys/class/bdi) for the backing_dev_info object. This allows us to see and set the various BDI specific variables. In particular this properly exposes the read-ahead window for all relevant users and /sys/block//queue/read_ahead_kb should be deprecated. With patient help from Kay Sievers and Greg KH [mszeredi@suse.cz] - split off NFS and FUSE changes into separate patches - document new sysfs attributes under Documentation/ABI - do bdi_class_init as a core_initcall, otherwise the "default" BDI won't be initialized - remove bdi_init_fmt macro, it's not used very much [akpm@linux-foundation.org: fix ia64 warning] Signed-off-by: Peter Zijlstra Cc: Kay Sievers Acked-by: Greg KH Cc: Trond Myklebust Signed-off-by: Miklos Szeredi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Add irq protection in the percpu-counters cpu-hotplug-callback path

2007-10-19T18:53:44Z

Some of the per-cpu counters and thus their locks are accessed from IRQ contexts. This can cause a deadlock if it interrupts a cpu-offline thread which is transferring a dead-cpu's counts to the global counter. Add appropriate IRQ protection in the cpu-hotplug callback path. Signed-off-by: Gautham R Shenoy Cc: KAMEZAWA Hiroyuki Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

lib: percpu_counter_init_irq

2007-10-17T15:42:44Z

provide a way to tell lockdep about percpu_counters that are supposed to be used from irq safe contexts. Signed-off-by: Peter Zijlstra Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

lib: percpu_counter_init error handling

2007-10-17T15:42:44Z

alloc_percpu can fail, propagate that error. Signed-off-by: Peter Zijlstra Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

lib: percpu_count_sum()

2007-10-17T15:42:44Z

Provide an accurate version of percpu_counter_read. Signed-off-by: Peter Zijlstra Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

lib: percpu_counter_sum_positive

2007-10-17T15:42:44Z

s/percpu_counter_sum/&_positive/ Because its consitent with percpu_counter_read* Signed-off-by: Peter Zijlstra Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

lib: percpu_counter_set

2007-10-17T15:42:44Z

Provide a method to set a percpu counter to a specified value. Signed-off-by: Peter Zijlstra Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

lib: make percpu_counter_add take s64

2007-10-17T15:42:44Z

percpu_counter is a s64 counter, make _add consitent. Signed-off-by: Peter Zijlstra Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

lib: percpu_counter variable batch

2007-10-17T15:42:44Z

Because the current batch setup has an quadric error bound on the counter, allow for an alternative setup. Signed-off-by: Peter Zijlstra Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

lib: percpu_counter_add

2007-10-17T15:42:44Z

s/percpu_counter_mod/percpu_counter_add/ Because its a better name, _mod implies modulo. Signed-off-by: Peter Zijlstra Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds