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Wed, 15 Sep 2021 17:53:37 +0000 From: Imran Khan To: vbabka@suse.cz, geert@linux-m68k.org, akpm@linux-foundation.org, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@linux.ie, daniel@ffwll.ch Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, intel-gfx@lists.freedesktop.org, linux-mm@kvack.org Subject: [PATCH RESEND v2 2/3] lib, stackdepot: Add helper to print stack entries. 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Provide a helper in stackdepot to print stack entries based on stackdepot handle. Also change above mentioned users to use this helper. Signed-off-by: Imran Khan Suggested-by: Vlastimil Babka Acked-by: Vlastimil Babka Reviewed-by: Alexander Potapenko --- include/linux/stackdepot.h | 2 ++ lib/stackdepot.c | 18 ++++++++++++++++++ mm/kasan/report.c | 15 +++------------ mm/page_owner.c | 13 ++++--------- 4 files changed, 27 insertions(+), 21 deletions(-) diff --git a/include/linux/stackdepot.h b/include/linux/stackdepot.h index 6bb4bc1a5f54..d77a30543dd4 100644 --- a/include/linux/stackdepot.h +++ b/include/linux/stackdepot.h @@ -19,6 +19,8 @@ depot_stack_handle_t stack_depot_save(unsigned long *entries, unsigned int stack_depot_fetch(depot_stack_handle_t handle, unsigned long **entries); +void stack_depot_print(depot_stack_handle_t stack); + unsigned int filter_irq_stacks(unsigned long *entries, unsigned int nr_entries); #ifdef CONFIG_STACKDEPOT diff --git a/lib/stackdepot.c b/lib/stackdepot.c index 67439c082490..354fe1b62017 100644 --- a/lib/stackdepot.c +++ b/lib/stackdepot.c @@ -214,6 +214,24 @@ static inline struct stack_record *find_stack(struct stack_record *bucket, return NULL; } +/** + * stack_depot_print - print stack entries from a depot + * + * @stack: Stack depot handle which was returned from + * stack_depot_save(). + * + */ +void stack_depot_print(depot_stack_handle_t stack) +{ + unsigned long *entries; + unsigned int nr_entries; + + nr_entries = stack_depot_fetch(stack, &entries); + if (nr_entries > 0) + stack_trace_print(entries, nr_entries, 0); +} +EXPORT_SYMBOL_GPL(stack_depot_print); + /** * stack_depot_fetch - Fetch stack entries from a depot * diff --git a/mm/kasan/report.c b/mm/kasan/report.c index 884a950c7026..3239fd8f8747 100644 --- a/mm/kasan/report.c +++ b/mm/kasan/report.c @@ -132,20 +132,11 @@ static void end_report(unsigned long *flags, unsigned long addr) kasan_enable_current(); } -static void print_stack(depot_stack_handle_t stack) -{ - unsigned long *entries; - unsigned int nr_entries; - - nr_entries = stack_depot_fetch(stack, &entries); - stack_trace_print(entries, nr_entries, 0); -} - static void print_track(struct kasan_track *track, const char *prefix) { pr_err("%s by task %u:\n", prefix, track->pid); if (track->stack) { - print_stack(track->stack); + stack_depot_print(track->stack); } else { pr_err("(stack is not available)\n"); } @@ -214,12 +205,12 @@ static void describe_object_stacks(struct kmem_cache *cache, void *object, return; if (alloc_meta->aux_stack[0]) { pr_err("Last potentially related work creation:\n"); - print_stack(alloc_meta->aux_stack[0]); + stack_depot_print(alloc_meta->aux_stack[0]); pr_err("\n"); } if (alloc_meta->aux_stack[1]) { pr_err("Second to last potentially related work creation:\n"); - print_stack(alloc_meta->aux_stack[1]); + stack_depot_print(alloc_meta->aux_stack[1]); pr_err("\n"); } #endif diff --git a/mm/page_owner.c b/mm/page_owner.c index d24ed221357c..7918770c2b2b 100644 --- a/mm/page_owner.c +++ b/mm/page_owner.c @@ -394,8 +394,6 @@ void __dump_page_owner(const struct page *page) struct page_ext *page_ext = lookup_page_ext(page); struct page_owner *page_owner; depot_stack_handle_t handle; - unsigned long *entries; - unsigned int nr_entries; gfp_t gfp_mask; int mt; @@ -423,20 +421,17 @@ void __dump_page_owner(const struct page *page) page_owner->pid, page_owner->ts_nsec, page_owner->free_ts_nsec); handle = READ_ONCE(page_owner->handle); - if (!handle) { + if (!handle) pr_alert("page_owner allocation stack trace missing\n"); - } else { - nr_entries = stack_depot_fetch(handle, &entries); - stack_trace_print(entries, nr_entries, 0); - } + else + stack_depot_print(handle); handle = READ_ONCE(page_owner->free_handle); if (!handle) { pr_alert("page_owner free stack trace missing\n"); } else { - nr_entries = stack_depot_fetch(handle, &entries); pr_alert("page last free stack trace:\n"); - stack_trace_print(entries, nr_entries, 0); + stack_depot_print(handle); } if (page_owner->last_migrate_reason != -1) -- 2.30.2 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,MSGID_FROM_MTA_HEADER,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E35A2C433EF for ; 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X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To print a stack entries, users of stackdepot, first use stack_depot_fetch to get a list of stack entries and then use stack_trace_print to print this list. Provide a helper in stackdepot to print stack entries based on stackdepot handle. Also change above mentioned users to use this helper. Signed-off-by: Imran Khan Suggested-by: Vlastimil Babka Acked-by: Vlastimil Babka Reviewed-by: Alexander Potapenko --- include/linux/stackdepot.h | 2 ++ lib/stackdepot.c | 18 ++++++++++++++++++ mm/kasan/report.c | 15 +++------------ mm/page_owner.c | 13 ++++--------- 4 files changed, 27 insertions(+), 21 deletions(-) diff --git a/include/linux/stackdepot.h b/include/linux/stackdepot.h index 6bb4bc1a5f54..d77a30543dd4 100644 --- a/include/linux/stackdepot.h +++ b/include/linux/stackdepot.h @@ -19,6 +19,8 @@ depot_stack_handle_t stack_depot_save(unsigned long *entries, unsigned int stack_depot_fetch(depot_stack_handle_t handle, unsigned long **entries); +void stack_depot_print(depot_stack_handle_t stack); + unsigned int filter_irq_stacks(unsigned long *entries, unsigned int nr_entries); #ifdef CONFIG_STACKDEPOT diff --git a/lib/stackdepot.c b/lib/stackdepot.c index 67439c082490..354fe1b62017 100644 --- a/lib/stackdepot.c +++ b/lib/stackdepot.c @@ -214,6 +214,24 @@ static inline struct stack_record *find_stack(struct stack_record *bucket, return NULL; } +/** + * stack_depot_print - print stack entries from a depot + * + * @stack: Stack depot handle which was returned from + * stack_depot_save(). + * + */ +void stack_depot_print(depot_stack_handle_t stack) +{ + unsigned long *entries; + unsigned int nr_entries; + + nr_entries = stack_depot_fetch(stack, &entries); + if (nr_entries > 0) + stack_trace_print(entries, nr_entries, 0); +} +EXPORT_SYMBOL_GPL(stack_depot_print); + /** * stack_depot_fetch - Fetch stack entries from a depot * diff --git a/mm/kasan/report.c b/mm/kasan/report.c index 884a950c7026..3239fd8f8747 100644 --- a/mm/kasan/report.c +++ b/mm/kasan/report.c @@ -132,20 +132,11 @@ static void end_report(unsigned long *flags, unsigned long addr) kasan_enable_current(); } -static void print_stack(depot_stack_handle_t stack) -{ - unsigned long *entries; - unsigned int nr_entries; - - nr_entries = stack_depot_fetch(stack, &entries); - stack_trace_print(entries, nr_entries, 0); -} - static void print_track(struct kasan_track *track, const char *prefix) { pr_err("%s by task %u:\n", prefix, track->pid); if (track->stack) { - print_stack(track->stack); + stack_depot_print(track->stack); } else { pr_err("(stack is not available)\n"); } @@ -214,12 +205,12 @@ static void describe_object_stacks(struct kmem_cache *cache, void *object, return; if (alloc_meta->aux_stack[0]) { pr_err("Last potentially related work creation:\n"); - print_stack(alloc_meta->aux_stack[0]); + stack_depot_print(alloc_meta->aux_stack[0]); pr_err("\n"); } if (alloc_meta->aux_stack[1]) { pr_err("Second to last potentially related work creation:\n"); - print_stack(alloc_meta->aux_stack[1]); + stack_depot_print(alloc_meta->aux_stack[1]); pr_err("\n"); } #endif diff --git a/mm/page_owner.c b/mm/page_owner.c index d24ed221357c..7918770c2b2b 100644 --- a/mm/page_owner.c +++ b/mm/page_owner.c @@ -394,8 +394,6 @@ void __dump_page_owner(const struct page *page) struct page_ext *page_ext = lookup_page_ext(page); struct page_owner *page_owner; depot_stack_handle_t handle; - unsigned long *entries; - unsigned int nr_entries; gfp_t gfp_mask; int mt; @@ -423,20 +421,17 @@ void __dump_page_owner(const struct page *page) page_owner->pid, page_owner->ts_nsec, page_owner->free_ts_nsec); handle = READ_ONCE(page_owner->handle); - if (!handle) { + if (!handle) pr_alert("page_owner allocation stack trace missing\n"); - } else { - nr_entries = stack_depot_fetch(handle, &entries); - stack_trace_print(entries, nr_entries, 0); - } + else + stack_depot_print(handle); handle = READ_ONCE(page_owner->free_handle); if (!handle) { pr_alert("page_owner free stack trace missing\n"); } else { - nr_entries = stack_depot_fetch(handle, &entries); pr_alert("page last free stack trace:\n"); - stack_trace_print(entries, nr_entries, 0); + stack_depot_print(handle); } if (page_owner->last_migrate_reason != -1) -- 2.30.2