The patch titled
Subject: mm/vmalloc: print a warning message first on failure
has been added to the -mm tree. Its filename is
mm-vmalloc-print-a-warning-message-first-on-failure.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-vmalloc-print-a-warning-message-first-on-failure.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-vmalloc-print-a-warning-message-first-on-failure.patch
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------------------------------------------------------
From: "Uladzislau Rezki (Sony)" <urezki@xxxxxxxxx>
Subject: mm/vmalloc: print a warning message first on failure
When a memory allocation for array of pages are not succeed emit a warning
message as a first step and then perform the further cleanup.
The reason it should be done in a right order is the clean up function
which is free_vm_area() can potentially also follow its error paths what
can lead to confusion what was broken first.
Link: https://lkml.kernel.org/r/20210516202056.2120-4-urezki@xxxxxxxxx
Signed-off-by: Uladzislau Rezki (Sony) <urezki@xxxxxxxxx>
Cc: Hillf Danton <hdanton@xxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Nicholas Piggin <npiggin@xxxxxxxxx>
Cc: Oleksiy Avramchenko <oleksiy.avramchenko@xxxxxxxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/vmalloc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/vmalloc.c~mm-vmalloc-print-a-warning-message-first-on-failure
+++ a/mm/vmalloc.c
@@ -2780,11 +2780,11 @@ static void *__vmalloc_area_node(struct
}
if (!area->pages) {
- free_vm_area(area);
warn_alloc(gfp_mask, NULL,
"vmalloc size %lu allocation failure: "
"page array size %lu allocation failed",
nr_small_pages * PAGE_SIZE, array_size);
+ free_vm_area(area);
return NULL;
}
_
Patches currently in -mm which might be from urezki@xxxxxxxxx are
mm-page_alloc-add-an-alloc_pages_bulk_array_node-helper.patch
mm-vmalloc-switch-to-bulk-allocator-in-__vmalloc_area_node.patch
mm-vmalloc-print-a-warning-message-first-on-failure.patch
