From patchwork Tue Oct 24 13:46:26 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Suren Baghdasaryan X-Patchwork-Id: 13434566 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E3D6E2E62F for ; Tue, 24 Oct 2023 13:47:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="e8MH4gnJ" Received: from mail-yb1-xb49.google.com (mail-yb1-xb49.google.com [IPv6:2607:f8b0:4864:20::b49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 60C081FD3 for ; Tue, 24 Oct 2023 06:47:47 -0700 (PDT) Received: by mail-yb1-xb49.google.com with SMTP id 3f1490d57ef6-d9a45e7e0f9so5267911276.0 for ; Tue, 24 Oct 2023 06:47:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1698155266; x=1698760066; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=QaUscnVR3A9ivKzFSXLwhZ9WVAKd01wEmSHK760WXQ8=; b=e8MH4gnJoAUpsPTyheF3wyTjBPTAOvkvqVsK4m8evYCMDbM6k+SRnEdexKewJMF7/C EB+7Qnca8n5RsAn+fOZdyj4uFlE1s2YGQp4QnyfI9JXhdkE73Nt5gfPaBTfcjTUg3Sd8 HR73DgnWHRunS5r+0EAFzWrR12p/qSOSyHva2483Ojt6rdfZF5B2we8JKHfTgq3yhG9a 7XPCtBXakeJgYmQV/DyoXGmlJC5ndSrmERPszGYkrWw4D/k7TXi/210ANxAAb0ZUpvkQ JYmaZyCTkTwCEXDflhlWc22d4aZm+PslZre6aCXyTUzv+wm7gMRlLH3VYHGPcYPYvzPv 1+KQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1698155266; x=1698760066; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=QaUscnVR3A9ivKzFSXLwhZ9WVAKd01wEmSHK760WXQ8=; b=BTcKwJdEFZ1bbkQENzk82uBJBPxWkycAiEtdeuTFGkY8LmJzFuHBdS/G2qS1iruacs z1IFWs9dCm/oCw75vARGHoZ8sxkicKKUSMWVEbC5b6rNIZsqDzcYaDbCp5YzMemWIVn9 rjl1/faFadPxzURI01LhdTxMiaaGCuFu0zIiKuKj9J52XrqW7A4pECKIKwrh6sy6uzSb 0HdvHOKPNBAgXtKp07lWcOw5GxIZEsdAI0tUDGIaFsRHLKLnXnh8xpFbD/zaTaq5YvBZ uzonr90t/9TpVT1B6Qin1gF5s6HE02Ew90CRVVUl3T09DhamR09Iq5sfvwV9r0nChKK2 Nziw== X-Gm-Message-State: AOJu0YxxXE//S5NWtPieMQOevn20WnlWa1M7grgb/lBk5optwOWMFy58 djXvzGlcXjViodqU995BV7asngcIo/g= X-Google-Smtp-Source: AGHT+IH1Lkjv7kiNBXwNvQL565BH4DAdvvh1g2aWFQE+hKVCSXY8/YuVaym3f5veoHBOTW82zGAoDjJNWeM= X-Received: from surenb-desktop.mtv.corp.google.com ([2620:15c:211:201:45ba:3318:d7a5:336a]) (user=surenb job=sendgmr) by 2002:a05:6902:105:b0:da0:3da9:ce08 with SMTP id o5-20020a056902010500b00da03da9ce08mr35592ybh.10.1698155266214; Tue, 24 Oct 2023 06:47:46 -0700 (PDT) Date: Tue, 24 Oct 2023 06:46:26 -0700 In-Reply-To: <20231024134637.3120277-1-surenb@google.com> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20231024134637.3120277-1-surenb@google.com> X-Mailer: git-send-email 2.42.0.758.gaed0368e0e-goog Message-ID: <20231024134637.3120277-30-surenb@google.com> Subject: [PATCH v2 29/39] mm: percpu: Introduce pcpuobj_ext From: Suren Baghdasaryan To: akpm@linux-foundation.org Cc: kent.overstreet@linux.dev, mhocko@suse.com, vbabka@suse.cz, hannes@cmpxchg.org, roman.gushchin@linux.dev, mgorman@suse.de, dave@stgolabs.net, willy@infradead.org, liam.howlett@oracle.com, corbet@lwn.net, void@manifault.com, peterz@infradead.org, juri.lelli@redhat.com, ldufour@linux.ibm.com, catalin.marinas@arm.com, will@kernel.org, arnd@arndb.de, tglx@linutronix.de, mingo@redhat.com, dave.hansen@linux.intel.com, x86@kernel.org, peterx@redhat.com, david@redhat.com, axboe@kernel.dk, mcgrof@kernel.org, masahiroy@kernel.org, nathan@kernel.org, dennis@kernel.org, tj@kernel.org, muchun.song@linux.dev, rppt@kernel.org, paulmck@kernel.org, pasha.tatashin@soleen.com, yosryahmed@google.com, yuzhao@google.com, dhowells@redhat.com, hughd@google.com, andreyknvl@gmail.com, keescook@chromium.org, ndesaulniers@google.com, vvvvvv@google.com, gregkh@linuxfoundation.org, ebiggers@google.com, ytcoode@gmail.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, bristot@redhat.com, vschneid@redhat.com, cl@linux.com, penberg@kernel.org, iamjoonsoo.kim@lge.com, 42.hyeyoo@gmail.com, glider@google.com, elver@google.com, dvyukov@google.com, shakeelb@google.com, songmuchun@bytedance.com, jbaron@akamai.com, rientjes@google.com, minchan@google.com, kaleshsingh@google.com, surenb@google.com, kernel-team@android.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, iommu@lists.linux.dev, linux-arch@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-modules@vger.kernel.org, kasan-dev@googlegroups.com, cgroups@vger.kernel.org From: Kent Overstreet Upcoming alloc tagging patches require a place to stash per-allocation metadata. We already do this when memcg is enabled, so this patch generalizes the obj_cgroup * vector in struct pcpu_chunk by creating a pcpu_obj_ext type, which we will be adding to in an upcoming patch - similarly to the previous slabobj_ext patch. Signed-off-by: Kent Overstreet Signed-off-by: Suren Baghdasaryan Cc: Andrew Morton Cc: Dennis Zhou Cc: Tejun Heo Cc: Christoph Lameter Cc: linux-mm@kvack.org --- mm/percpu-internal.h | 19 +++++++++++++++++-- mm/percpu.c | 30 +++++++++++++++--------------- 2 files changed, 32 insertions(+), 17 deletions(-) diff --git a/mm/percpu-internal.h b/mm/percpu-internal.h index cdd0aa597a81..e62d582f4bf3 100644 --- a/mm/percpu-internal.h +++ b/mm/percpu-internal.h @@ -32,6 +32,16 @@ struct pcpu_block_md { int nr_bits; /* total bits responsible for */ }; +struct pcpuobj_ext { +#ifdef CONFIG_MEMCG_KMEM + struct obj_cgroup *cgroup; +#endif +}; + +#ifdef CONFIG_MEMCG_KMEM +#define NEED_PCPUOBJ_EXT +#endif + struct pcpu_chunk { #ifdef CONFIG_PERCPU_STATS int nr_alloc; /* # of allocations */ @@ -64,8 +74,8 @@ struct pcpu_chunk { int end_offset; /* additional area required to have the region end page aligned */ -#ifdef CONFIG_MEMCG_KMEM - struct obj_cgroup **obj_cgroups; /* vector of object cgroups */ +#ifdef NEED_PCPUOBJ_EXT + struct pcpuobj_ext *obj_exts; /* vector of object cgroups */ #endif int nr_pages; /* # of pages served by this chunk */ @@ -74,6 +84,11 @@ struct pcpu_chunk { unsigned long populated[]; /* populated bitmap */ }; +static inline bool need_pcpuobj_ext(void) +{ + return !mem_cgroup_kmem_disabled(); +} + extern spinlock_t pcpu_lock; extern struct list_head *pcpu_chunk_lists; diff --git a/mm/percpu.c b/mm/percpu.c index a7665de8485f..5a6202acffa3 100644 --- a/mm/percpu.c +++ b/mm/percpu.c @@ -1392,9 +1392,9 @@ static struct pcpu_chunk * __init pcpu_alloc_first_chunk(unsigned long tmp_addr, panic("%s: Failed to allocate %zu bytes\n", __func__, alloc_size); -#ifdef CONFIG_MEMCG_KMEM +#ifdef NEED_PCPUOBJ_EXT /* first chunk is free to use */ - chunk->obj_cgroups = NULL; + chunk->obj_exts = NULL; #endif pcpu_init_md_blocks(chunk); @@ -1463,12 +1463,12 @@ static struct pcpu_chunk *pcpu_alloc_chunk(gfp_t gfp) if (!chunk->md_blocks) goto md_blocks_fail; -#ifdef CONFIG_MEMCG_KMEM - if (!mem_cgroup_kmem_disabled()) { - chunk->obj_cgroups = +#ifdef NEED_PCPUOBJ_EXT + if (need_pcpuobj_ext()) { + chunk->obj_exts = pcpu_mem_zalloc(pcpu_chunk_map_bits(chunk) * - sizeof(struct obj_cgroup *), gfp); - if (!chunk->obj_cgroups) + sizeof(struct pcpuobj_ext), gfp); + if (!chunk->obj_exts) goto objcg_fail; } #endif @@ -1480,7 +1480,7 @@ static struct pcpu_chunk *pcpu_alloc_chunk(gfp_t gfp) return chunk; -#ifdef CONFIG_MEMCG_KMEM +#ifdef NEED_PCPUOBJ_EXT objcg_fail: pcpu_mem_free(chunk->md_blocks); #endif @@ -1498,8 +1498,8 @@ static void pcpu_free_chunk(struct pcpu_chunk *chunk) { if (!chunk) return; -#ifdef CONFIG_MEMCG_KMEM - pcpu_mem_free(chunk->obj_cgroups); +#ifdef NEED_PCPUOBJ_EXT + pcpu_mem_free(chunk->obj_exts); #endif pcpu_mem_free(chunk->md_blocks); pcpu_mem_free(chunk->bound_map); @@ -1648,8 +1648,8 @@ static void pcpu_memcg_post_alloc_hook(struct obj_cgroup *objcg, if (!objcg) return; - if (likely(chunk && chunk->obj_cgroups)) { - chunk->obj_cgroups[off >> PCPU_MIN_ALLOC_SHIFT] = objcg; + if (likely(chunk && chunk->obj_exts)) { + chunk->obj_exts[off >> PCPU_MIN_ALLOC_SHIFT].cgroup = objcg; rcu_read_lock(); mod_memcg_state(obj_cgroup_memcg(objcg), MEMCG_PERCPU_B, @@ -1665,13 +1665,13 @@ static void pcpu_memcg_free_hook(struct pcpu_chunk *chunk, int off, size_t size) { struct obj_cgroup *objcg; - if (unlikely(!chunk->obj_cgroups)) + if (unlikely(!chunk->obj_exts)) return; - objcg = chunk->obj_cgroups[off >> PCPU_MIN_ALLOC_SHIFT]; + objcg = chunk->obj_exts[off >> PCPU_MIN_ALLOC_SHIFT].cgroup; if (!objcg) return; - chunk->obj_cgroups[off >> PCPU_MIN_ALLOC_SHIFT] = NULL; + chunk->obj_exts[off >> PCPU_MIN_ALLOC_SHIFT].cgroup = NULL; obj_cgroup_uncharge(objcg, pcpu_obj_full_size(size));