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pmalloc: always lock pages

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Type: feature

Change-Id: I5bbf37969c9c51e40a013d1fc3ab966838eeb80d
Signed-off-by: Damjan Marion <damarion@cisco.com>
(cherry picked from commit 801c7016ad90e5f5618f523b3f9284daee0b696c)
This commit is contained in:
Damjan Marion
2019-10-30 18:07:35 +01:00
committed by Andrew Yourtchenko
parent 5ec78926b6
commit 5b2eea6e07
2 changed files with 16 additions and 25 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
MAINTAINERS
View File

@ -49,6 +49,11 @@ I: vppinfra
M: Dave Barach <dave@barachs.net>
F: src/vppinfra/
Physical Memory Allocator
I: pmalloc
M: Damjan Marion <damarion@cisco.com>
F: src/vppinfra/pmalloc.[ch]
Vector Library
I: vlib
M: Dave Barach <dave@barachs.net>

36
src/vppinfra/pmalloc.c
View File

@ -261,11 +261,10 @@ pmalloc_map_pages (clib_pmalloc_main_t * pm, clib_pmalloc_arena_t * a,
{
clib_pmalloc_page_t *pp = 0;
int status, rv, i, mmap_flags;
void *va;
void *va = MAP_FAILED;
int old_mpol = -1;
long unsigned int mask[16] = { 0 };
long unsigned int old_mask[16] = { 0 };
uword page_size = 1ULL << a->log2_subpage_sz;
uword size = (uword) n_pages << pm->def_log2_page_sz;
clib_error_free (pm->error);
@ -304,9 +303,6 @@ pmalloc_map_pages (clib_pmalloc_main_t * pm, clib_pmalloc_arena_t * a,
mmap_flags = MAP_FIXED;
if ((pm->flags & CLIB_PMALLOC_F_NO_PAGEMAP) == 0)
mmap_flags |= MAP_LOCKED;
if (a->flags & CLIB_PMALLOC_ARENA_F_SHARED_MEM)
{
mmap_flags |= MAP_SHARED;
@ -338,23 +334,10 @@ pmalloc_map_pages (clib_pmalloc_main_t * pm, clib_pmalloc_arena_t * a,
goto error;
}
/* Check if huge page is not allocated,
wrong allocation will generate the SIGBUS */
if (a->log2_subpage_sz != pm->sys_log2_page_sz)
if (a->log2_subpage_sz != pm->sys_log2_page_sz && mlock (va, size) != 0)
{
for (int i = 0; i < n_pages; i++)
{
unsigned char flag;
mincore (va + i * page_size, 1, &flag);
// flag is 1 if the page was successfully allocated and in memory
if (!flag)
{
pm->error =
clib_error_return_unix (0,
"Unable to fulfill huge page allocation request");
goto error;
}
}
pm->error = clib_error_return_unix (0, "Unable to lock pages");
goto error;
}
clib_memset (va, 0, size);
@ -377,10 +360,6 @@ pmalloc_map_pages (clib_pmalloc_main_t * pm, clib_pmalloc_arena_t * a,
clib_error_return (0, "page allocated on wrong node, numa node "
"%u status %d", numa_node, status);
/* unmap & reesrve */
munmap (va, size);
mmap (va, size, PROT_NONE, MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS,
-1, 0);
goto error;
}
@ -410,6 +389,13 @@ pmalloc_map_pages (clib_pmalloc_main_t * pm, clib_pmalloc_arena_t * a,
return pp - (n_pages - 1);
error:
if (va != MAP_FAILED)
{
/* unmap & reserve */
munmap (va, size);
mmap (va, size, PROT_NONE, MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS,
-1, 0);
}
if (a->fd != -1)
close (a->fd);
return 0;