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Commit 45141eea authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq 

Pull workqueue updates from Tejun Heo:
 "Workqueue now prints debug information at the end of sysrq-t which
  should be helpful when tracking down suspected workqueue stalls.  It
  only prints out the ones with something currently going on so it
  shouldn't add much output in most cases"

* 'for-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
  workqueue: Reorder sysfs code
  percpu: Fix trivial typos in comments
  workqueue: dump workqueues on sysrq-t
  workqueue: keep track of the flushing task and pool manager
  workqueue: make the workqueues list RCU walkable
parents 8954672d 6ba94429

drivers/tty/sysrq.c

+1 −0
Original line number Diff line number Diff line
@@ -275,6 +275,7 @@ static struct sysrq_key_op sysrq_showregs_op = { 
static void sysrq_handle_showstate(int key)

{

	show_state();

	show_workqueue_state();

}

static struct sysrq_key_op sysrq_showstate_op = {

	.handler	= sysrq_handle_showstate,

include/linux/workqueue.h

+1 −0
Original line number Diff line number Diff line
@@ -454,6 +454,7 @@ extern bool workqueue_congested(int cpu, struct workqueue_struct *wq); 
extern unsigned int work_busy(struct work_struct *work);

extern __printf(1, 2) void set_worker_desc(const char *fmt, ...);

extern void print_worker_info(const char *log_lvl, struct task_struct *task);

extern void show_workqueue_state(void);



/**

 * queue_work - queue work on a workqueue

kernel/workqueue.c

+886 −705

File changed.

Preview size limit exceeded, changes collapsed.

mm/percpu.c

+2 −2
Original line number Diff line number Diff line
@@ -1310,7 +1310,7 @@ bool is_kernel_percpu_address(unsigned long addr) 
 * and, from the second one, the backing allocator (currently either vm or

 * km) provides translation.

 *

 * The addr can be tranlated simply without checking if it falls into the

 * The addr can be translated simply without checking if it falls into the

 * first chunk. But the current code reflects better how percpu allocator

 * actually works, and the verification can discover both bugs in percpu

 * allocator itself and per_cpu_ptr_to_phys() callers. So we keep current
@@ -1762,7 +1762,7 @@ early_param("percpu_alloc", percpu_alloc_setup); 
 * and other parameters considering needed percpu size, allocation

 * atom size and distances between CPUs.

 *

 * Groups are always mutliples of atom size and CPUs which are of

 * Groups are always multiples of atom size and CPUs which are of

 * LOCAL_DISTANCE both ways are grouped together and share space for

 * units in the same group.  The returned configuration is guaranteed

 * to have CPUs on different nodes on different groups and >=75% usage