From patchwork Tue May 29 21:17:18 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Josef Bacik X-Patchwork-Id: 10437081 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 5E0D1602BF for ; Tue, 29 May 2018 21:17:50 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4D7E728991 for ; Tue, 29 May 2018 21:17:50 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 420B82899C; Tue, 29 May 2018 21:17:50 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9B9B328991 for ; Tue, 29 May 2018 21:17:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S967228AbeE2VRr (ORCPT ); Tue, 29 May 2018 17:17:47 -0400 Received: from mail-qt0-f194.google.com ([209.85.216.194]:45872 "EHLO mail-qt0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S966847AbeE2VRi (ORCPT ); Tue, 29 May 2018 17:17:38 -0400 Received: by mail-qt0-f194.google.com with SMTP id i18-v6so9940086qtp.12 for ; Tue, 29 May 2018 14:17:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=toxicpanda-com.20150623.gappssmtp.com; s=20150623; h=from:to:subject:date:message-id:in-reply-to:references; bh=OnLfniKgYvskwWLXSUKc15Ogio1wVy7+KmfqXSJANSw=; b=ba/vFuCJsuymw9g2OXls8eUduizbkpWsZE1tBt53Bxls7YwdBimttLnBz2ClxClVoL zEU905JfzhUpXdtUxbZHMqFjQWpJkteixUGMD37n14N0qn7vvq1NSTZHc4lRFFTGvbrI iJN/ShF/RV6rTNBlp5uBQiYn61p5HgVgqz/L/UAj9LWWTjn52HycRr8Hr3jhP80OZhNs N4sO1sovnk60hs2oBqqO5R9B+CIx/hSVMB/J4B3R+oSda9jh6CxdtORnYd3+Mgt6Uqns JiaLmZtFfW5bkn82efUTT17w2Pt6YeFuDE7CL7zdKIVGFwnEy8QN+1C+VDvuO3RylgEF uUnA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references; bh=OnLfniKgYvskwWLXSUKc15Ogio1wVy7+KmfqXSJANSw=; b=aKnjv6iA4vdJN79WueVC3xns4nDQv9pjkbzh4ZqfBPgdxrM+J98DJE57LfH4An4QRw +KFkngY31+jlWbccW+rUlJux4dAIvtPAgxGZuUvENBwiJ3vhNZjtbf7PIMn+vkwa3smH OB5zZlipX6QUw77dcIdcRmI7RWHFeonSX7V2tUAxVR6Ore3turV4wOVrWIaaGvf+NYQJ +BsJmmIaKsg9EXRrIu5SxHTYXeuQsnHdV2lfAPszIRLFts5957AkFpgl4Gdggx3ZNIQ7 +XF4wP3H1qCuZH80Bka4b5Paqv/2LqdvV7e8Fy3ad4H8Dp6b46vUL84nWm72q3vJB7Px ZrTw== X-Gm-Message-State: APt69E0vldrrONWjip/JbRn/FX6XuO49v6zwloP6MFgatewBppR6GCP3 uASX1bmoGZeE9L5apjkVyCN3QQ== X-Google-Smtp-Source: ADUXVKKIvwUqU7vC0+vLDAA2I7uxeDDG1pW5+MNyzUxb6vg+Xyw9a5GM95vjIYEHesdo2tuTAhi7zQ== X-Received: by 2002:ac8:2e1c:: with SMTP id r28-v6mr89382qta.156.1527628657716; Tue, 29 May 2018 14:17:37 -0700 (PDT) Received: from localhost (cpe-2606-A000-4381-1201-225-22FF-FEB3-E51A.dyn6.twc.com. [2606:a000:4381:1201:225:22ff:feb3:e51a]) by smtp.gmail.com with ESMTPSA id r25-v6sm5236761qtc.39.2018.05.29.14.17.36 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 29 May 2018 14:17:37 -0700 (PDT) From: Josef Bacik To: axboe@kernel.dk, kernel-team@fb.com, linux-block@vger.kernel.org, akpm@linux-foundation.org, linux-mm@kvack.org, hannes@cmpxchg.org, linux-kernel@vger.kernel.org, tj@kernel.org, linux-fsdevel@vger.kernel.org Subject: [PATCH 07/13] memcontrol: schedule throttling if we are congested Date: Tue, 29 May 2018 17:17:18 -0400 Message-Id: <20180529211724.4531-8-josef@toxicpanda.com> X-Mailer: git-send-email 2.14.3 In-Reply-To: <20180529211724.4531-1-josef@toxicpanda.com> References: <20180529211724.4531-1-josef@toxicpanda.com> Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Tejun Heo Memory allocations can induce swapping via kswapd or direct reclaim. If we are having IO done for us by kswapd and don't actually go into direct reclaim we may never get scheduled for throttling. So instead check to see if our cgroup is congested, and if so schedule the throttling. Before we return to user space the throttling stuff will only throttle if we actually required it. Signed-off-by: Tejun Heo --- include/linux/memcontrol.h | 13 +++++++++++++ mm/huge_memory.c | 6 +++--- mm/memcontrol.c | 24 ++++++++++++++++++++++++ mm/memory.c | 11 ++++++----- mm/shmem.c | 10 +++++----- 5 files changed, 51 insertions(+), 13 deletions(-) diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index d99b71bc2c66..4d2e7f35f2dc 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -290,6 +290,9 @@ bool mem_cgroup_low(struct mem_cgroup *root, struct mem_cgroup *memcg); int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, gfp_t gfp_mask, struct mem_cgroup **memcgp, bool compound); +int mem_cgroup_try_charge_delay(struct page *page, struct mm_struct *mm, + gfp_t gfp_mask, struct mem_cgroup **memcgp, + bool compound); void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg, bool lrucare, bool compound); void mem_cgroup_cancel_charge(struct page *page, struct mem_cgroup *memcg, @@ -745,6 +748,16 @@ static inline int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, return 0; } +static inline int mem_cgroup_try_charge_delay(struct page *page, + struct mm_struct *mm, + gfp_t gfp_mask, + struct mem_cgroup **memcgp, + bool compound) +{ + *memcgp = NULL; + return 0; +} + static inline void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg, bool lrucare, bool compound) diff --git a/mm/huge_memory.c b/mm/huge_memory.c index a3a1815f8e11..9812ddad9961 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -555,7 +555,7 @@ static int __do_huge_pmd_anonymous_page(struct vm_fault *vmf, struct page *page, VM_BUG_ON_PAGE(!PageCompound(page), page); - if (mem_cgroup_try_charge(page, vma->vm_mm, gfp, &memcg, true)) { + if (mem_cgroup_try_charge_delay(page, vma->vm_mm, gfp, &memcg, true)) { put_page(page); count_vm_event(THP_FAULT_FALLBACK); return VM_FAULT_FALLBACK; @@ -1145,7 +1145,7 @@ static int do_huge_pmd_wp_page_fallback(struct vm_fault *vmf, pmd_t orig_pmd, pages[i] = alloc_page_vma_node(GFP_HIGHUSER_MOVABLE, vma, vmf->address, page_to_nid(page)); if (unlikely(!pages[i] || - mem_cgroup_try_charge(pages[i], vma->vm_mm, + mem_cgroup_try_charge_delay(pages[i], vma->vm_mm, GFP_KERNEL, &memcg, false))) { if (pages[i]) put_page(pages[i]); @@ -1315,7 +1315,7 @@ int do_huge_pmd_wp_page(struct vm_fault *vmf, pmd_t orig_pmd) goto out; } - if (unlikely(mem_cgroup_try_charge(new_page, vma->vm_mm, + if (unlikely(mem_cgroup_try_charge_delay(new_page, vma->vm_mm, huge_gfp, &memcg, true))) { put_page(new_page); split_huge_pmd(vma, vmf->pmd, vmf->address); diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 2bd3df3d101a..81f61b66d27a 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -5458,6 +5458,30 @@ int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm, return ret; } +int mem_cgroup_try_charge_delay(struct page *page, struct mm_struct *mm, + gfp_t gfp_mask, struct mem_cgroup **memcgp, + bool compound) +{ + struct mem_cgroup *memcg; + struct block_device *bdev; + int ret; + + ret = mem_cgroup_try_charge(page, mm, gfp_mask, memcgp, compound); + memcg = *memcgp; + + if (!(gfp_mask & __GFP_IO) || !memcg) + return ret; +#if defined(CONFIG_BLOCK) && defined(CONFIG_SWAP) + if (atomic_read(&memcg->css.cgroup->congestion_count) && + has_usable_swap()) { + map_swap_page(page, &bdev); + + blkcg_schedule_throttle(bdev_get_queue(bdev), true); + } +#endif + return ret; +} + /** * mem_cgroup_commit_charge - commit a page charge * @page: page to charge diff --git a/mm/memory.c b/mm/memory.c index 01f5464e0fd2..d0eea6d33b18 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -2494,7 +2494,7 @@ static int wp_page_copy(struct vm_fault *vmf) cow_user_page(new_page, old_page, vmf->address, vma); } - if (mem_cgroup_try_charge(new_page, mm, GFP_KERNEL, &memcg, false)) + if (mem_cgroup_try_charge_delay(new_page, mm, GFP_KERNEL, &memcg, false)) goto oom_free_new; __SetPageUptodate(new_page); @@ -2994,8 +2994,8 @@ int do_swap_page(struct vm_fault *vmf) goto out_page; } - if (mem_cgroup_try_charge(page, vma->vm_mm, GFP_KERNEL, - &memcg, false)) { + if (mem_cgroup_try_charge_delay(page, vma->vm_mm, GFP_KERNEL, + &memcg, false)) { ret = VM_FAULT_OOM; goto out_page; } @@ -3156,7 +3156,8 @@ static int do_anonymous_page(struct vm_fault *vmf) if (!page) goto oom; - if (mem_cgroup_try_charge(page, vma->vm_mm, GFP_KERNEL, &memcg, false)) + if (mem_cgroup_try_charge_delay(page, vma->vm_mm, GFP_KERNEL, &memcg, + false)) goto oom_free_page; /* @@ -3652,7 +3653,7 @@ static int do_cow_fault(struct vm_fault *vmf) if (!vmf->cow_page) return VM_FAULT_OOM; - if (mem_cgroup_try_charge(vmf->cow_page, vma->vm_mm, GFP_KERNEL, + if (mem_cgroup_try_charge_delay(vmf->cow_page, vma->vm_mm, GFP_KERNEL, &vmf->memcg, false)) { put_page(vmf->cow_page); return VM_FAULT_OOM; diff --git a/mm/shmem.c b/mm/shmem.c index 9d6c7e595415..a96af5690864 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -1219,8 +1219,8 @@ int shmem_unuse(swp_entry_t swap, struct page *page) * the shmem_swaplist_mutex which might hold up shmem_writepage(). * Charged back to the user (not to caller) when swap account is used. */ - error = mem_cgroup_try_charge(page, current->mm, GFP_KERNEL, &memcg, - false); + error = mem_cgroup_try_charge_delay(page, current->mm, GFP_KERNEL, + &memcg, false); if (error) goto out; /* No radix_tree_preload: swap entry keeps a place for page in tree */ @@ -1697,7 +1697,7 @@ static int shmem_getpage_gfp(struct inode *inode, pgoff_t index, goto failed; } - error = mem_cgroup_try_charge(page, charge_mm, gfp, &memcg, + error = mem_cgroup_try_charge_delay(page, charge_mm, gfp, &memcg, false); if (!error) { error = shmem_add_to_page_cache(page, mapping, index, @@ -1803,7 +1803,7 @@ alloc_nohuge: page = shmem_alloc_and_acct_page(gfp, inode, if (sgp == SGP_WRITE) __SetPageReferenced(page); - error = mem_cgroup_try_charge(page, charge_mm, gfp, &memcg, + error = mem_cgroup_try_charge_delay(page, charge_mm, gfp, &memcg, PageTransHuge(page)); if (error) goto unacct; @@ -2276,7 +2276,7 @@ static int shmem_mfill_atomic_pte(struct mm_struct *dst_mm, __SetPageSwapBacked(page); __SetPageUptodate(page); - ret = mem_cgroup_try_charge(page, dst_mm, gfp, &memcg, false); + ret = mem_cgroup_try_charge_delay(page, dst_mm, gfp, &memcg, false); if (ret) goto out_release;