The patch titled
cpuset: remove on stack cpumask_t in cpuset_sprintf_cpulist()
has been removed from the -mm tree. Its filename was
cpuset-remove-on-stack-cpumask_t-in-cpuset_sprintf_cpulist.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: cpuset: remove on stack cpumask_t in cpuset_sprintf_cpulist()
From: Li Zefan <lizf@xxxxxxxxxxxxxx>
This patchset converts cpuset to use new cpumask API, and thus
remove on stack cpumask_t to reduce stack usage.
Before:
# cat kernel/cpuset.c include/linux/cpuset.h | grep -c cpumask_t
21
After:
# cat kernel/cpuset.c include/linux/cpuset.h | grep -c cpumask_t
0
This patch:
Impact: reduce stack usage
It's safe to call cpulist_scnprintf inside callback_mutex, and thus we can
just remove the cpumask_t and no need to allocate a cpumask_var_t.
Signed-off-by: Li Zefan <lizf@xxxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Acked-by: Mike Travis <travis@xxxxxxx>
Cc: Paul Menage <menage@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/cpuset.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff -puN kernel/cpuset.c~cpuset-remove-on-stack-cpumask_t-in-cpuset_sprintf_cpulist kernel/cpuset.c
--- a/kernel/cpuset.c~cpuset-remove-on-stack-cpumask_t-in-cpuset_sprintf_cpulist
+++ a/kernel/cpuset.c
@@ -1486,13 +1486,13 @@ static int cpuset_write_resmask(struct c
static int cpuset_sprintf_cpulist(char *page, struct cpuset *cs)
{
- cpumask_t mask;
+ int ret;
mutex_lock(&callback_mutex);
- mask = cs->cpus_allowed;
+ ret = cpulist_scnprintf(page, PAGE_SIZE, &cs->cpus_allowed);
mutex_unlock(&callback_mutex);
- return cpulist_scnprintf(page, PAGE_SIZE, &mask);
+ return ret;
}
static int cpuset_sprintf_memlist(char *page, struct cpuset *cs)
_
Patches currently in -mm which might be from lizf@xxxxxxxxxxxxxx are
origin.patch
linux-next.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
