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staging/lustre/ptlrpc: Do not use deprecated cpus_* functions 

As per Rusty Russel, cpus_* functions are deprecated.
When mixing cpumask_copy with cpus_weight, they operate on different
sized masks if CPUMASK_OFFSTACK is enabled, causing an
immediate assertion failure.
Copying of cpumasks by assignment is also not allowed now.

Additionally, in ptlrpc/service.c avoid the cpumask copies,
since we only use it to check how many siblings are there for
core #0 and nothing else.

Reported-by: Tyson Whitehead <twhitehead@gmail.com>
Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Oleg Drokin 2015-03-04 01:07:51 -05:00 committed by Rusty Russell
parent 35168f512f
commit dc0d838a05
2 changed files with 7 additions and 10 deletions
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8
drivers/staging/lustre/lustre/ptlrpc/ptlrpcd.c
View File

@ -511,10 +511,10 @@ static int ptlrpcd_bind(int index, int max)
#if defined(CONFIG_NUMA)
{
int i;
mask = *cpumask_of_node(cpu_to_node(index));
cpumask_copy(&mask, cpumask_of_node(cpu_to_node(index)));
for (i = max; i < num_online_cpus(); i++)
cpu_clear(i, mask);
pc->pc_npartners = cpus_weight(mask) - 1;
cpumask_clear_cpu(i, &mask);
pc->pc_npartners = cpumask_weight(&mask) - 1;
set_bit(LIOD_BIND, &pc->pc_flags);
}
#else
@ -554,7 +554,7 @@ static int ptlrpcd_bind(int index, int max)
* that are already initialized
*/
for (pidx = 0, i = 0; i < index; i++) {
if (cpu_isset(i, mask)) {
if (cpumask_test_cpu(i, &mask)) {
ppc = &ptlrpcds->pd_threads[i];
pc->pc_partners[pidx++] = ppc;
ppc->pc_partners[ppc->

9
drivers/staging/lustre/lustre/ptlrpc/service.c
View File

@ -543,7 +543,6 @@ ptlrpc_server_nthreads_check(struct ptlrpc_service *svc,
if (tc->tc_thr_factor != 0) {
int factor = tc->tc_thr_factor;
const int fade = 4;
cpumask_t mask;
/*
* User wants to increase number of threads with for
@ -557,8 +556,8 @@ ptlrpc_server_nthreads_check(struct ptlrpc_service *svc,
* have too many threads no matter how many cores/HTs
* there are.
*/
cpumask_copy(&mask, topology_thread_cpumask(0));
if (cpus_weight(mask) > 1) { /* weight is # of HTs */
/* weight is # of HTs */
if (cpumask_weight(topology_thread_cpumask(0)) > 1) {
/* depress thread factor for hyper-thread */
factor = factor - (factor >> 1) + (factor >> 3);
}
@ -2752,7 +2751,6 @@ int ptlrpc_start_thread(struct ptlrpc_service_part *svcpt, int wait)
int ptlrpc_hr_init(void)
{
cpumask_t mask;
struct ptlrpc_hr_partition *hrp;
struct ptlrpc_hr_thread *hrt;
int rc;
@ -2770,8 +2768,7 @@ int ptlrpc_hr_init(void)
init_waitqueue_head(&ptlrpc_hr.hr_waitq);
cpumask_copy(&mask, topology_thread_cpumask(0));
weight = cpus_weight(mask);
weight = cpumask_weight(topology_thread_cpumask(0));
cfs_percpt_for_each(hrp, i, ptlrpc_hr.hr_partitions) {
hrp->hrp_cpt = i;