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vppinfra: send minimal needed mask to the set_mempolicy syscall

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Type: fix
fixes: 561ae5d

Change-Id: I0d98f5b43bc9ab5d31463b285177a11a10b864d2
Signed-off-by: Damjan Marion <dmarion@me.com>
This commit is contained in:
Damjan Marion
2022-10-17 17:27:28 +02:00
committed by Dave Wallace
parent 1cc592b17c
commit fecb2524ab
1 changed files with 14 additions and 11 deletions
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25
src/vppinfra/linux/mem.c
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@@ -28,6 +28,7 @@
#include <vppinfra/mem.h>
#include <vppinfra/lock.h>
#include <vppinfra/time.h>
#include <vppinfra/bitmap.h>
#include <vppinfra/format.h>
#include <vppinfra/clib_error.h>
#include <vppinfra/linux/sysfs.h>
@@ -608,8 +609,8 @@ __clib_export int
clib_mem_set_numa_affinity (u8 numa_node, int force)
{
clib_mem_main_t *mm = &clib_mem_main;
long unsigned int mask[16] = { 0 };
int mask_len = sizeof (mask) * 8 + 1;
clib_bitmap_t *bmp = 0;
int rv;
/* no numa support */
if (mm->numa_node_bitmap == 0)
@@ -625,19 +626,21 @@ clib_mem_set_numa_affinity (u8 numa_node, int force)
return 0;
}
mask[0] = 1 << numa_node;
bmp = clib_bitmap_set (bmp, numa_node, 1);
if (syscall (__NR_set_mempolicy, force ? MPOL_BIND : MPOL_PREFERRED, mask,
mask_len))
goto error;
rv = syscall (__NR_set_mempolicy, force ? MPOL_BIND : MPOL_PREFERRED, bmp,
vec_len (bmp) * sizeof (bmp[0] * 8) + 1);
clib_bitmap_free (bmp);
vec_reset_length (mm->error);
if (rv)
{
mm->error = clib_error_return_unix (mm->error, (char *) __func__);
return CLIB_MEM_ERROR;
}
return 0;
error:
vec_reset_length (mm->error);
mm->error = clib_error_return_unix (mm->error, (char *) __func__);
return CLIB_MEM_ERROR;
}
__clib_export int