The tool pp_alloc_fail.py tested error recovery by injecting errors into page_pool_alloc_pages(). Perhaps due to the netmems conversion, page_pool_put_full_page() does not end up calling that function.
page_pool_alloc_netmems() seems to be the base function for all the the allocation functions in the API call, so put the error injection there instead.
Signed-off-by: John Daley johndale@cisco.com
John Daley (1): page_pool: inject pp_alloc_fail errors in the right place
net/core/page_pool.c | 2 +- tools/testing/selftests/drivers/net/hw/pp_alloc_fail.py | 6 +++--- 2 files changed, 4 insertions(+), 4 deletions(-)
The tool pp_alloc_fail.py tested error recovery by injecting errors into the function page_pool_alloc_pages(). The page pool allocation function page_pool_dev_alloc() does not end up calling page_pool_alloc_pages(). page_pool_alloc_netmems() seems to be the function that is called by all of the page pool alloc functions in the API, so move error injection to that function instead.
Signed-off-by: John Daley johndale@cisco.com --- net/core/page_pool.c | 2 +- tools/testing/selftests/drivers/net/hw/pp_alloc_fail.py | 6 +++--- 2 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/net/core/page_pool.c b/net/core/page_pool.c index 9733206d6406..a3de752c5178 100644 --- a/net/core/page_pool.c +++ b/net/core/page_pool.c @@ -595,13 +595,13 @@ netmem_ref page_pool_alloc_netmems(struct page_pool *pool, gfp_t gfp) return netmem; } EXPORT_SYMBOL(page_pool_alloc_netmems); +ALLOW_ERROR_INJECTION(page_pool_alloc_netmems, NULL);
struct page *page_pool_alloc_pages(struct page_pool *pool, gfp_t gfp) { return netmem_to_page(page_pool_alloc_netmems(pool, gfp)); } 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 diff --git a/tools/testing/selftests/drivers/net/hw/pp_alloc_fail.py b/tools/testing/selftests/drivers/net/hw/pp_alloc_fail.py index 05b6fbb3fcdd..ad192fef3117 100755 --- a/tools/testing/selftests/drivers/net/hw/pp_alloc_fail.py +++ b/tools/testing/selftests/drivers/net/hw/pp_alloc_fail.py @@ -21,9 +21,9 @@ def _enable_pp_allocation_fail(): if not os.path.exists("/sys/kernel/debug/fail_function"): raise KsftSkipEx("Kernel built without function error injection (or DebugFS)")
- if not os.path.exists("/sys/kernel/debug/fail_function/page_pool_alloc_pages"): + if not os.path.exists("/sys/kernel/debug/fail_function/page_pool_alloc_netmems"): with open("/sys/kernel/debug/fail_function/inject", "w") as fp: - fp.write("page_pool_alloc_pages\n") + fp.write("page_pool_alloc_netmems\n")
_write_fail_config({ "verbose": 0, @@ -37,7 +37,7 @@ def _disable_pp_allocation_fail(): if not os.path.exists("/sys/kernel/debug/fail_function"): return
- if os.path.exists("/sys/kernel/debug/fail_function/page_pool_alloc_pages"): + if os.path.exists("/sys/kernel/debug/fail_function/page_pool_alloc_netmems"): with open("/sys/kernel/debug/fail_function/inject", "w") as fp: fp.write("\n")
On Tue, 14 Jan 2025 14:31:59 -0800 John Daley wrote:
The tool pp_alloc_fail.py tested error recovery by injecting errors into the function page_pool_alloc_pages(). The page pool allocation function page_pool_dev_alloc() does not end up calling page_pool_alloc_pages(). page_pool_alloc_netmems() seems to be the function that is called by all of the page pool alloc functions in the API, so move error injection to that function instead.
LGTM, thanks!
Please resend and CC netdev@, tho.
linux-kselftest-mirror@lists.linaro.org
-
Jakub Kicinski -
John Daley