From b66930052abf2e41b8a978ae265303917cbe6fa0 Mon Sep 17 00:00:00 2001 From: Catalin Marinas Date: Wed, 28 Sep 2011 17:22:56 +0100 Subject: [PATCH] kmemleak: When the early log buffer is exceeded, report the actual number Just telling that the early log buffer has been exceeded doesn't mean much. This patch moves the error printing to the kmemleak_init() function and displays the actual calls to the kmemleak API during early logging. Signed-off-by: Catalin Marinas --- mm/kmemleak.c | 21 +++++++++++++++------ 1 file changed, 15 insertions(+), 6 deletions(-) diff --git a/mm/kmemleak.c b/mm/kmemleak.c index 8b528e3f8413..e8c905b70aa8 100644 --- a/mm/kmemleak.c +++ b/mm/kmemleak.c @@ -797,9 +797,13 @@ static void __init log_early(int op_type, const void *ptr, size_t size, unsigned long flags; struct early_log *log; + if (atomic_read(&kmemleak_error)) { + /* kmemleak stopped recording, just count the requests */ + crt_early_log++; + return; + } + if (crt_early_log >= ARRAY_SIZE(early_log)) { - pr_warning("Early log buffer exceeded, " - "please increase DEBUG_KMEMLEAK_EARLY_LOG_SIZE\n"); kmemleak_disable(); return; } @@ -1634,7 +1638,6 @@ static void kmemleak_disable(void) return; /* stop any memory operation tracing */ - atomic_set(&kmemleak_early_log, 0); atomic_set(&kmemleak_enabled, 0); /* check whether it is too early for a kernel thread */ @@ -1694,12 +1697,18 @@ void __init kmemleak_init(void) scan_area_cache = KMEM_CACHE(kmemleak_scan_area, SLAB_NOLEAKTRACE); INIT_PRIO_TREE_ROOT(&object_tree_root); + if (crt_early_log >= ARRAY_SIZE(early_log)) + pr_warning("Early log buffer exceeded (%d), please increase " + "DEBUG_KMEMLEAK_EARLY_LOG_SIZE\n", crt_early_log); + /* the kernel is still in UP mode, so disabling the IRQs is enough */ local_irq_save(flags); - if (!atomic_read(&kmemleak_error)) { + atomic_set(&kmemleak_early_log, 0); + if (atomic_read(&kmemleak_error)) { + local_irq_restore(flags); + return; + } else atomic_set(&kmemleak_enabled, 1); - atomic_set(&kmemleak_early_log, 0); - } local_irq_restore(flags); /* -- 2.20.1