diff --git a/tools/testing/selftests/bpf/uprobe_multi.c b/tools/testing/selftests/bpf/uprobe_multi.c index dd38dc68f635..3e58a86b8e25 100644 --- a/tools/testing/selftests/bpf/uprobe_multi.c +++ b/tools/testing/selftests/bpf/uprobe_multi.c @@ -100,6 +100,9 @@ int __attribute__((weak)) trigger_uprobe(bool build_id_resident) int page_sz = sysconf(_SC_PAGESIZE); void *addr; + unsigned char vec[1]; + int poll = 0; + /* page-align build ID start */ addr = (void *)((uintptr_t)&build_id_start & ~(page_sz - 1)); @@ -108,9 +111,19 @@ int __attribute__((weak)) trigger_uprobe(bool build_id_resident) * do MADV_POPULATE_READ, and then MADV_PAGEOUT, if necessary */ madvise(addr, page_sz, MADV_POPULATE_READ); - if (!build_id_resident) - madvise(addr, page_sz, MADV_PAGEOUT); - + if (!build_id_resident) { + do { + madvise(addr, page_sz, MADV_PAGEOUT); + /* check if page has been evicted */ + mincore(addr, page_sz, vec); + if (!(vec[0] & 1)) + break; + /* if page is still resident re-attempt MADV_POPULATE_READ/MADV_PAGEOUT */ + madvise(addr, page_sz, MADV_POPULATE_READ); + poll++; + usleep(100); + } while (poll < 500); + } (void)uprobe(); return 0; diff --git a/tools/testing/selftests/bpf/uprobe_multi.ld b/tools/testing/selftests/bpf/uprobe_multi.ld index a2e94828bc8c..2063714b2899 100644 --- a/tools/testing/selftests/bpf/uprobe_multi.ld +++ b/tools/testing/selftests/bpf/uprobe_multi.ld @@ -1,8 +1,8 @@ SECTIONS { - . = ALIGN(4096); + . = ALIGN(65536); .note.gnu.build-id : { *(.note.gnu.build-id) } - . = ALIGN(4096); + . = ALIGN(65536); } INSERT AFTER .text;