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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 31D59C636D4 for ; Fri, 17 Feb 2023 04:44:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229588AbjBQEoh (ORCPT ); Thu, 16 Feb 2023 23:44:37 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55168 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229601AbjBQEod (ORCPT ); Thu, 16 Feb 2023 23:44:33 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D84A648E2B for ; Thu, 16 Feb 2023 20:44:30 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 5AEC461245 for ; Fri, 17 Feb 2023 04:44:30 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B224DC4339B; Fri, 17 Feb 2023 04:44:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1676609069; bh=1vTbB4d09lHcFt0X64u9/RisxGOAjxPbBmDKV9teDso=; h=Date:To:From:Subject:From; b=FTS8F4PskghWxE+ASfNhBfPev1xcBqwnWUxXPK/yymiJjypWxXHuTKQf+r+L5t8jX fRRG4gvuuBpLC9K2uf8v81ND5af1VaY7QxFGS3+nlrXBlbInkn8T4FpQh/bT2ze8f/ jg5QOYm+mtua8dQbuBlIXXHcL5YO0trFN/DuGAFY= Date: Thu, 16 Feb 2023 20:44:29 -0800 To: mm-commits@vger.kernel.org, glider@google.com, andreyknvl@google.com, akpm@linux-foundation.org From: Andrew Morton Subject: [merged mm-stable] lib-stackdepot-rename-handle-and-pool-constants.patch removed from -mm tree Message-Id: <20230217044429.B224DC4339B@smtp.kernel.org> Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org The quilt patch titled Subject: lib/stackdepot: rename handle and pool constants has been removed from the -mm tree. Its filename was lib-stackdepot-rename-handle-and-pool-constants.patch This patch was dropped because it was merged into the mm-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm ------------------------------------------------------ From: Andrey Konovalov Subject: lib/stackdepot: rename handle and pool constants Date: Fri, 10 Feb 2023 22:15:58 +0100 Change the "STACK_ALLOC_" prefix to "DEPOT_" for the constants that define the number of bits in stack depot handles and the maximum number of pools. The old prefix is unclear and makes wonder about how these constants are related to stack allocations. The new prefix is also shorter. Also simplify the comment for DEPOT_POOL_ORDER. No functional changes. Link: https://lkml.kernel.org/r/84fcceb0acc261a356a0ad4bdfab9ff04bea2445.1676063693.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov Reviewed-by: Alexander Potapenko Signed-off-by: Andrew Morton --- --- a/lib/stackdepot.c~lib-stackdepot-rename-handle-and-pool-constants +++ a/lib/stackdepot.c @@ -36,30 +36,28 @@ #include #include -#define DEPOT_STACK_BITS (sizeof(depot_stack_handle_t) * 8) +#define DEPOT_HANDLE_BITS (sizeof(depot_stack_handle_t) * 8) -#define STACK_ALLOC_NULL_PROTECTION_BITS 1 -#define STACK_ALLOC_ORDER 2 /* Pool size order for stack depot, 4 pages */ -#define STACK_ALLOC_SIZE (1LL << (PAGE_SHIFT + STACK_ALLOC_ORDER)) -#define STACK_ALLOC_ALIGN 4 -#define STACK_ALLOC_OFFSET_BITS (STACK_ALLOC_ORDER + PAGE_SHIFT - \ - STACK_ALLOC_ALIGN) -#define STACK_ALLOC_INDEX_BITS (DEPOT_STACK_BITS - \ - STACK_ALLOC_NULL_PROTECTION_BITS - \ - STACK_ALLOC_OFFSET_BITS - STACK_DEPOT_EXTRA_BITS) -#define STACK_ALLOC_POOLS_CAP 8192 -#define STACK_ALLOC_MAX_POOLS \ - (((1LL << (STACK_ALLOC_INDEX_BITS)) < STACK_ALLOC_POOLS_CAP) ? \ - (1LL << (STACK_ALLOC_INDEX_BITS)) : STACK_ALLOC_POOLS_CAP) +#define DEPOT_VALID_BITS 1 +#define DEPOT_POOL_ORDER 2 /* Pool size order, 4 pages */ +#define DEPOT_POOL_SIZE (1LL << (PAGE_SHIFT + DEPOT_POOL_ORDER)) +#define DEPOT_STACK_ALIGN 4 +#define DEPOT_OFFSET_BITS (DEPOT_POOL_ORDER + PAGE_SHIFT - DEPOT_STACK_ALIGN) +#define DEPOT_POOL_INDEX_BITS (DEPOT_HANDLE_BITS - DEPOT_VALID_BITS - \ + DEPOT_OFFSET_BITS - STACK_DEPOT_EXTRA_BITS) +#define DEPOT_POOLS_CAP 8192 +#define DEPOT_MAX_POOLS \ + (((1LL << (DEPOT_POOL_INDEX_BITS)) < DEPOT_POOLS_CAP) ? \ + (1LL << (DEPOT_POOL_INDEX_BITS)) : DEPOT_POOLS_CAP) /* The compact structure to store the reference to stacks. */ union handle_parts { depot_stack_handle_t handle; struct { - u32 pool_index : STACK_ALLOC_INDEX_BITS; - u32 offset : STACK_ALLOC_OFFSET_BITS; - u32 valid : STACK_ALLOC_NULL_PROTECTION_BITS; - u32 extra : STACK_DEPOT_EXTRA_BITS; + u32 pool_index : DEPOT_POOL_INDEX_BITS; + u32 offset : DEPOT_OFFSET_BITS; + u32 valid : DEPOT_VALID_BITS; + u32 extra : STACK_DEPOT_EXTRA_BITS; }; }; @@ -91,7 +89,7 @@ static unsigned int stack_bucket_number_ static unsigned int stack_hash_mask; /* Array of memory regions that store stack traces. */ -static void *stack_pools[STACK_ALLOC_MAX_POOLS]; +static void *stack_pools[DEPOT_MAX_POOLS]; /* Currently used pool in stack_pools. */ static int pool_index; /* Offset to the unused space in the currently used pool. */ @@ -235,7 +233,7 @@ static bool init_stack_pool(void **preal *prealloc = NULL; } else { /* If this is the last depot pool, do not touch the next one. */ - if (pool_index + 1 < STACK_ALLOC_MAX_POOLS) { + if (pool_index + 1 < DEPOT_MAX_POOLS) { stack_pools[pool_index + 1] = *prealloc; *prealloc = NULL; } @@ -255,10 +253,10 @@ depot_alloc_stack(unsigned long *entries struct stack_record *stack; size_t required_size = struct_size(stack, entries, size); - required_size = ALIGN(required_size, 1 << STACK_ALLOC_ALIGN); + required_size = ALIGN(required_size, 1 << DEPOT_STACK_ALIGN); - if (unlikely(pool_offset + required_size > STACK_ALLOC_SIZE)) { - if (unlikely(pool_index + 1 >= STACK_ALLOC_MAX_POOLS)) { + if (unlikely(pool_offset + required_size > DEPOT_POOL_SIZE)) { + if (unlikely(pool_index + 1 >= DEPOT_MAX_POOLS)) { WARN_ONCE(1, "Stack depot reached limit capacity"); return NULL; } @@ -269,7 +267,7 @@ depot_alloc_stack(unsigned long *entries * |next_pool_inited| in stack_depot_save() and * init_stack_pool(). */ - if (pool_index + 1 < STACK_ALLOC_MAX_POOLS) + if (pool_index + 1 < DEPOT_MAX_POOLS) smp_store_release(&next_pool_inited, 0); } init_stack_pool(prealloc); @@ -281,7 +279,7 @@ depot_alloc_stack(unsigned long *entries stack->hash = hash; stack->size = size; stack->handle.pool_index = pool_index; - stack->handle.offset = pool_offset >> STACK_ALLOC_ALIGN; + stack->handle.offset = pool_offset >> DEPOT_STACK_ALIGN; stack->handle.valid = 1; stack->handle.extra = 0; memcpy(stack->entries, entries, flex_array_size(stack, entries, size)); @@ -412,7 +410,7 @@ depot_stack_handle_t __stack_depot_save( alloc_flags &= ~GFP_ZONEMASK; alloc_flags &= (GFP_ATOMIC | GFP_KERNEL); alloc_flags |= __GFP_NOWARN; - page = alloc_pages(alloc_flags, STACK_ALLOC_ORDER); + page = alloc_pages(alloc_flags, DEPOT_POOL_ORDER); if (page) prealloc = page_address(page); } @@ -444,7 +442,7 @@ depot_stack_handle_t __stack_depot_save( exit: if (prealloc) { /* Nobody used this memory, ok to free it. */ - free_pages((unsigned long)prealloc, STACK_ALLOC_ORDER); + free_pages((unsigned long)prealloc, DEPOT_POOL_ORDER); } if (found) retval.handle = found->handle.handle; @@ -489,7 +487,7 @@ unsigned int stack_depot_fetch(depot_sta { union handle_parts parts = { .handle = handle }; void *pool; - size_t offset = parts.offset << STACK_ALLOC_ALIGN; + size_t offset = parts.offset << DEPOT_STACK_ALIGN; struct stack_record *stack; *entries = NULL; _ Patches currently in -mm which might be from andreyknvl@google.com are