Because of caching / recycling using the general page allocation failures to induce errors in page pool allocation is very hard. Add direct error injection support to page_pool_alloc_pages().
Reviewed-by: Willem de Bruijn willemb@google.com Signed-off-by: Jakub Kicinski kuba@kernel.org --- CC: hawk@kernel.org CC: ilias.apalodimas@linaro.org --- net/core/page_pool.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/net/core/page_pool.c b/net/core/page_pool.c index 273c24429bce..8bcc7014a61a 100644 --- a/net/core/page_pool.c +++ b/net/core/page_pool.c @@ -5,6 +5,7 @@ * Copyright (C) 2016 Red Hat, Inc. */
+#include <linux/error-injection.h> #include <linux/types.h> #include <linux/kernel.h> #include <linux/slab.h> @@ -550,6 +551,7 @@ struct page *page_pool_alloc_pages(struct page_pool *pool, gfp_t gfp) return page; } EXPORT_SYMBOL(page_pool_alloc_pages); +ALLOW_ERROR_INJECTION(page_pool_alloc_pages, NULL);
/* Calculate distance between two u32 values, valid if distance is below 2^(31) * https://en.wikipedia.org/wiki/Serial_number_arithmetic#General_Solution