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alistair23-linux
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sched: No need for bootmem special cases 

As of commit dcce284 ("mm: Extend gfp masking to the page
allocator") and commit 7e85ee0 ("slab,slub: don't enable
interrupts during early boot"), the slab allocator makes
sure we don't attempt to sleep during boot.

Therefore, remove bootmem special cases from the scheduler
and use plain GFP_KERNEL instead.

Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1279225102-2572-1-git-send-email-penberg@cs.helsinki.fi>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
hifive-unleashed-5.1
Pekka Enberg 2010-07-15 23:18:22 +03:00 committed by Ingo Molnar
parent bbc8cb5bae
commit 68c38fc3cb
3 changed files with 10 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
kernel/sched.c
View File

@ -6248,23 +6248,18 @@ static void rq_attach_root(struct rq *rq, struct root_domain *rd)
free_rootdomain(old_rd);
}
static int init_rootdomain(struct root_domain *rd, bool bootmem)
static int init_rootdomain(struct root_domain *rd)
{
gfp_t gfp = GFP_KERNEL;
memset(rd, 0, sizeof(*rd));
if (bootmem)
gfp = GFP_NOWAIT;
if (!alloc_cpumask_var(&rd->span, gfp))
if (!alloc_cpumask_var(&rd->span, GFP_KERNEL))
goto out;
if (!alloc_cpumask_var(&rd->online, gfp))
if (!alloc_cpumask_var(&rd->online, GFP_KERNEL))
goto free_span;
if (!alloc_cpumask_var(&rd->rto_mask, gfp))
if (!alloc_cpumask_var(&rd->rto_mask, GFP_KERNEL))
goto free_online;
if (cpupri_init(&rd->cpupri, bootmem) != 0)
if (cpupri_init(&rd->cpupri) != 0)
goto free_rto_mask;
return 0;
@ -6280,7 +6275,7 @@ out:
static void init_defrootdomain(void)
{
init_rootdomain(&def_root_domain, true);
init_rootdomain(&def_root_domain);
atomic_set(&def_root_domain.refcount, 1);
}
@ -6293,7 +6288,7 @@ static struct root_domain *alloc_rootdomain(void)
if (!rd)
return NULL;
if (init_rootdomain(rd, false) != 0) {
if (init_rootdomain(rd) != 0) {
kfree(rd);
return NULL;
}

8
kernel/sched_cpupri.c
View File

@ -166,14 +166,10 @@ void cpupri_set(struct cpupri *cp, int cpu, int newpri)
*
* Returns: -ENOMEM if memory fails.
*/
int cpupri_init(struct cpupri *cp, bool bootmem)
int cpupri_init(struct cpupri *cp)
{
gfp_t gfp = GFP_KERNEL;
int i;
if (bootmem)
gfp = GFP_NOWAIT;
memset(cp, 0, sizeof(*cp));
for (i = 0; i < CPUPRI_NR_PRIORITIES; i++) {
@ -181,7 +177,7 @@ int cpupri_init(struct cpupri *cp, bool bootmem)
raw_spin_lock_init(&vec->lock);
vec->count = 0;
if (!zalloc_cpumask_var(&vec->mask, gfp))
if (!zalloc_cpumask_var(&vec->mask, GFP_KERNEL))
goto cleanup;
}

2
kernel/sched_cpupri.h
View File

@ -27,7 +27,7 @@ struct cpupri {
int cpupri_find(struct cpupri *cp,
struct task_struct *p, struct cpumask *lowest_mask);
void cpupri_set(struct cpupri *cp, int cpu, int pri);
int cpupri_init(struct cpupri *cp, bool bootmem);
int cpupri_init(struct cpupri *cp);
void cpupri_cleanup(struct cpupri *cp);
#else
#define cpupri_set(cp, cpu, pri) do { } while (0)