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drbd: Converted drbd_calc_cpu_mask() and drbd_thread_current_set_cpu() from mdev to tconn

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Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
This commit is contained in:
Philipp Reisner 2011-02-08 12:46:30 +01:00
parent 907599e044
commit 808222845d
5 changed files with 25 additions and 20 deletions
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8
drivers/block/drbd/drbd_int.h
View File

@ -946,6 +946,7 @@ struct drbd_tconn { /* is a resource from the config file */
struct drbd_thread receiver;
struct drbd_thread worker;
struct drbd_thread asender;
cpumask_var_t cpu_mask;
};
struct drbd_conf {
@ -1075,7 +1076,6 @@ struct drbd_conf {
spinlock_t peer_seq_lock;
unsigned int minor;
unsigned long comm_bm_set; /* communicated number of set bits. */
cpumask_var_t cpu_mask;
struct bm_io_work bm_io_work;
u64 ed_uuid; /* UUID of the exposed data */
struct mutex state_mutex;
@ -1149,10 +1149,10 @@ extern int drbd_thread_start(struct drbd_thread *thi);
extern void _drbd_thread_stop(struct drbd_thread *thi, int restart, int wait);
extern char *drbd_task_to_thread_name(struct drbd_conf *mdev, struct task_struct *task);
#ifdef CONFIG_SMP
extern void drbd_thread_current_set_cpu(struct drbd_conf *mdev, struct drbd_thread *thi);
extern void drbd_calc_cpu_mask(struct drbd_conf *mdev);
extern void drbd_thread_current_set_cpu(struct drbd_thread *thi);
extern void drbd_calc_cpu_mask(struct drbd_tconn *tconn);
#else
#define drbd_thread_current_set_cpu(A, B) ({})
#define drbd_thread_current_set_cpu(A) ({})
#define drbd_calc_cpu_mask(A) ({})
#endif
extern void drbd_free_resources(struct drbd_conf *mdev);

25
drivers/block/drbd/drbd_main.c
View File

@ -606,6 +606,12 @@ char *drbd_task_to_thread_name(struct drbd_conf *mdev, struct task_struct *task)
}
#ifdef CONFIG_SMP
static int conn_lowest_minor(struct drbd_tconn *tconn)
{
int minor = 0;
idr_get_next(&tconn->volumes, &minor);
return minor;
}
/**
* drbd_calc_cpu_mask() - Generate CPU masks, spread over all CPUs
* @mdev: DRBD device.
@ -613,23 +619,23 @@ char *drbd_task_to_thread_name(struct drbd_conf *mdev, struct task_struct *task)
* Forces all threads of a device onto the same CPU. This is beneficial for
* DRBD's performance. May be overwritten by user's configuration.
*/
void drbd_calc_cpu_mask(struct drbd_conf *mdev)
void drbd_calc_cpu_mask(struct drbd_tconn *tconn)
{
int ord, cpu;
/* user override. */
if (cpumask_weight(mdev->cpu_mask))
if (cpumask_weight(tconn->cpu_mask))
return;
ord = mdev_to_minor(mdev) % cpumask_weight(cpu_online_mask);
ord = conn_lowest_minor(tconn) % cpumask_weight(cpu_online_mask);
for_each_online_cpu(cpu) {
if (ord-- == 0) {
cpumask_set_cpu(cpu, mdev->cpu_mask);
cpumask_set_cpu(cpu, tconn->cpu_mask);
return;
}
}
/* should not be reached */
cpumask_setall(mdev->cpu_mask);
cpumask_setall(tconn->cpu_mask);
}
/**
@ -640,14 +646,14 @@ void drbd_calc_cpu_mask(struct drbd_conf *mdev)
* call in the "main loop" of _all_ threads, no need for any mutex, current won't die
* prematurely.
*/
void drbd_thread_current_set_cpu(struct drbd_conf *mdev, struct drbd_thread *thi)
void drbd_thread_current_set_cpu(struct drbd_thread *thi)
{
struct task_struct *p = current;
if (!thi->reset_cpu_mask)
return;
thi->reset_cpu_mask = 0;
set_cpus_allowed_ptr(p, mdev->cpu_mask);
set_cpus_allowed_ptr(p, thi->mdev->tconn->cpu_mask);
}
#endif
@ -2236,7 +2242,7 @@ struct drbd_conf *drbd_new_device(unsigned int minor)
dev_err(DEV, "vnr = %d\n", vnr);
goto out_no_cpumask;
}
if (!zalloc_cpumask_var(&mdev->cpu_mask, GFP_KERNEL))
if (!zalloc_cpumask_var(&mdev->tconn->cpu_mask, GFP_KERNEL))
goto out_no_cpumask;
mdev->tconn->volume0 = mdev;
@ -2313,7 +2319,7 @@ out_no_io_page:
out_no_disk:
blk_cleanup_queue(q);
out_no_q:
free_cpumask_var(mdev->cpu_mask);
free_cpumask_var(mdev->tconn->cpu_mask);
out_no_cpumask:
drbd_free_tconn(mdev->tconn);
out_no_tconn:
@ -2332,7 +2338,6 @@ void drbd_free_mdev(struct drbd_conf *mdev)
__free_page(mdev->md_io_page);
put_disk(mdev->vdisk);
blk_cleanup_queue(mdev->rq_queue);
free_cpumask_var(mdev->cpu_mask);
kfree(mdev);
}

6
drivers/block/drbd/drbd_nl.c
View File

@ -1884,9 +1884,9 @@ static int drbd_nl_syncer_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *n
if (mdev->state.conn >= C_CONNECTED)
drbd_send_sync_param(mdev, &sc);
if (!cpumask_equal(mdev->cpu_mask, new_cpu_mask)) {
cpumask_copy(mdev->cpu_mask, new_cpu_mask);
drbd_calc_cpu_mask(mdev);
if (!cpumask_equal(mdev->tconn->cpu_mask, new_cpu_mask)) {
cpumask_copy(mdev->tconn->cpu_mask, new_cpu_mask);
drbd_calc_cpu_mask(mdev->tconn);
mdev->tconn->receiver.reset_cpu_mask = 1;
mdev->tconn->asender.reset_cpu_mask = 1;
mdev->tconn->worker.reset_cpu_mask = 1;

4
drivers/block/drbd/drbd_receiver.c
View File

@ -3779,7 +3779,7 @@ static void drbdd(struct drbd_conf *mdev)
int rv;
while (get_t_state(&mdev->tconn->receiver) == RUNNING) {
drbd_thread_current_set_cpu(mdev, &mdev->tconn->receiver);
drbd_thread_current_set_cpu(&mdev->tconn->receiver);
if (!drbd_recv_header(mdev->tconn, &pi))
goto err_out;
@ -4568,7 +4568,7 @@ int drbd_asender(struct drbd_thread *thi)
current->rt_priority = 2; /* more important than all other tasks */
while (get_t_state(thi) == RUNNING) {
drbd_thread_current_set_cpu(mdev, thi);
drbd_thread_current_set_cpu(thi);
if (test_and_clear_bit(SEND_PING, &mdev->tconn->flags)) {
if (!drbd_send_ping(mdev)) {
dev_err(DEV, "drbd_send_ping has failed\n");

2
drivers/block/drbd/drbd_worker.c
View File

@ -1634,7 +1634,7 @@ int drbd_worker(struct drbd_thread *thi)
sprintf(current->comm, "drbd%d_worker", mdev_to_minor(mdev));
while (get_t_state(thi) == RUNNING) {
drbd_thread_current_set_cpu(mdev, thi);
drbd_thread_current_set_cpu(thi);
if (down_trylock(&mdev->tconn->data.work.s)) {
mutex_lock(&mdev->tconn->data.mutex);