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Diffstat (limited to 'mm/vmalloc.c')
-rw-r--r--mm/vmalloc.c73
1 files changed, 58 insertions, 15 deletions
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index d2a00ad4e1dd..4165304d3547 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -31,6 +31,7 @@
#include <linux/kmemleak.h>
#include <linux/atomic.h>
#include <linux/compiler.h>
+#include <linux/memcontrol.h>
#include <linux/llist.h>
#include <linux/bitops.h>
#include <linux/rbtree_augmented.h>
@@ -38,6 +39,7 @@
#include <linux/pgtable.h>
#include <linux/uaccess.h>
#include <linux/hugetlb.h>
+#include <linux/sched/mm.h>
#include <asm/tlbflush.h>
#include <asm/shmparam.h>
@@ -2623,12 +2625,13 @@ static void __vunmap(const void *addr, int deallocate_pages)
if (deallocate_pages) {
unsigned int page_order = vm_area_page_order(area);
- int i;
+ int i, step = 1U << page_order;
- for (i = 0; i < area->nr_pages; i += 1U << page_order) {
+ for (i = 0; i < area->nr_pages; i += step) {
struct page *page = area->pages[i];
BUG_ON(!page);
+ mod_memcg_page_state(page, MEMCG_VMALLOC, -step);
__free_pages(page, page_order);
cond_resched();
}
@@ -2844,6 +2847,8 @@ vm_area_alloc_pages(gfp_t gfp, int nid,
* more permissive.
*/
if (!order) {
+ gfp_t bulk_gfp = gfp & ~__GFP_NOFAIL;
+
while (nr_allocated < nr_pages) {
unsigned int nr, nr_pages_request;
@@ -2861,12 +2866,12 @@ vm_area_alloc_pages(gfp_t gfp, int nid,
* but mempolcy want to alloc memory by interleaving.
*/
if (IS_ENABLED(CONFIG_NUMA) && nid == NUMA_NO_NODE)
- nr = alloc_pages_bulk_array_mempolicy(gfp,
+ nr = alloc_pages_bulk_array_mempolicy(bulk_gfp,
nr_pages_request,
pages + nr_allocated);
else
- nr = alloc_pages_bulk_array_node(gfp, nid,
+ nr = alloc_pages_bulk_array_node(bulk_gfp, nid,
nr_pages_request,
pages + nr_allocated);
@@ -2921,11 +2926,14 @@ static void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask,
{
const gfp_t nested_gfp = (gfp_mask & GFP_RECLAIM_MASK) | __GFP_ZERO;
const gfp_t orig_gfp_mask = gfp_mask;
+ bool nofail = gfp_mask & __GFP_NOFAIL;
unsigned long addr = (unsigned long)area->addr;
unsigned long size = get_vm_area_size(area);
unsigned long array_size;
unsigned int nr_small_pages = size >> PAGE_SHIFT;
unsigned int page_order;
+ unsigned int flags;
+ int ret;
array_size = (unsigned long)nr_small_pages * sizeof(struct page *);
gfp_mask |= __GFP_NOWARN;
@@ -2955,6 +2963,13 @@ static void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask,
page_order, nr_small_pages, area->pages);
atomic_long_add(area->nr_pages, &nr_vmalloc_pages);
+ if (gfp_mask & __GFP_ACCOUNT) {
+ int i, step = 1U << page_order;
+
+ for (i = 0; i < area->nr_pages; i += step)
+ mod_memcg_page_state(area->pages[i], MEMCG_VMALLOC,
+ step);
+ }
/*
* If not enough pages were obtained to accomplish an
@@ -2967,8 +2982,28 @@ static void *__vmalloc_area_node(struct vm_struct *area, gfp_t gfp_mask,
goto fail;
}
- if (vmap_pages_range(addr, addr + size, prot, area->pages,
- page_shift) < 0) {
+ /*
+ * page tables allocations ignore external gfp mask, enforce it
+ * by the scope API
+ */
+ if ((gfp_mask & (__GFP_FS | __GFP_IO)) == __GFP_IO)
+ flags = memalloc_nofs_save();
+ else if ((gfp_mask & (__GFP_FS | __GFP_IO)) == 0)
+ flags = memalloc_noio_save();
+
+ do {
+ ret = vmap_pages_range(addr, addr + size, prot, area->pages,
+ page_shift);
+ if (nofail && (ret < 0))
+ schedule_timeout_uninterruptible(1);
+ } while (nofail && (ret < 0));
+
+ if ((gfp_mask & (__GFP_FS | __GFP_IO)) == __GFP_IO)
+ memalloc_nofs_restore(flags);
+ else if ((gfp_mask & (__GFP_FS | __GFP_IO)) == 0)
+ memalloc_noio_restore(flags);
+
+ if (ret < 0) {
warn_alloc(orig_gfp_mask, NULL,
"vmalloc error: size %lu, failed to map pages",
area->nr_pages * PAGE_SIZE);
@@ -2996,12 +3031,14 @@ fail:
*
* Allocate enough pages to cover @size from the page level
* allocator with @gfp_mask flags. Please note that the full set of gfp
- * flags are not supported. GFP_KERNEL would be a preferred allocation mode
- * but GFP_NOFS and GFP_NOIO are supported as well. Zone modifiers are not
- * supported. From the reclaim modifiers__GFP_DIRECT_RECLAIM is required (aka
- * GFP_NOWAIT is not supported) and only __GFP_NOFAIL is supported (aka
- * __GFP_NORETRY and __GFP_RETRY_MAYFAIL are not supported).
- * __GFP_NOWARN can be used to suppress error messages about failures.
+ * flags are not supported. GFP_KERNEL, GFP_NOFS and GFP_NOIO are all
+ * supported.
+ * Zone modifiers are not supported. From the reclaim modifiers
+ * __GFP_DIRECT_RECLAIM is required (aka GFP_NOWAIT is not supported)
+ * and only __GFP_NOFAIL is supported (i.e. __GFP_NORETRY and
+ * __GFP_RETRY_MAYFAIL are not supported).
+ *
+ * __GFP_NOWARN can be used to suppress failures messages.
*
* Map them into contiguous kernel virtual space, using a pagetable
* protection of @prot.
@@ -3056,9 +3093,14 @@ again:
VM_UNINITIALIZED | vm_flags, start, end, node,
gfp_mask, caller);
if (!area) {
+ bool nofail = gfp_mask & __GFP_NOFAIL;
warn_alloc(gfp_mask, NULL,
- "vmalloc error: size %lu, vm_struct allocation failed",
- real_size);
+ "vmalloc error: size %lu, vm_struct allocation failed%s",
+ real_size, (nofail) ? ". Retrying." : "");
+ if (nofail) {
+ schedule_timeout_uninterruptible(1);
+ goto again;
+ }
goto fail;
}
@@ -3074,7 +3116,8 @@ again:
clear_vm_uninitialized_flag(area);
size = PAGE_ALIGN(size);
- kmemleak_vmalloc(area, size, gfp_mask);
+ if (!(vm_flags & VM_DEFER_KMEMLEAK))
+ kmemleak_vmalloc(area, size, gfp_mask);
return addr;
generated by cgit v1.2.3 (git 2.39.0) at 2025-02-02 21:30:37 +0300