From patchwork Wed Apr 7 01:44:47 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michel Lespinasse X-Patchwork-Id: 12186463 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=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 5CCA7C433ED for ; Wed, 7 Apr 2021 01:45:49 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 0922461165 for ; Wed, 7 Apr 2021 01:45:49 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0922461165 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=lespinasse.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id BA8EE8E0006; Tue, 6 Apr 2021 21:45:10 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 1E30D8E0005; Tue, 6 Apr 2021 21:45:10 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 6E7DA6B0095; Tue, 6 Apr 2021 21:45:09 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0248.hostedemail.com [216.40.44.248]) by kanga.kvack.org (Postfix) with ESMTP id 71E336B0096 for ; Tue, 6 Apr 2021 21:45:08 -0400 (EDT) Received: from smtpin12.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 3200881D6 for ; Wed, 7 Apr 2021 01:45:08 +0000 (UTC) X-FDA: 78003877896.12.2AD47C1 Received: from server.lespinasse.org (server.lespinasse.org [63.205.204.226]) by imf05.hostedemail.com (Postfix) with ESMTP id 54217E000110 for ; Wed, 7 Apr 2021 01:45:07 +0000 (UTC) DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=lespinasse.org; i=@lespinasse.org; q=dns/txt; s=srv-11-ed; t=1617759903; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding : from; bh=VxqJ3bt6CreFlT+E4DjXvWhsZS5gJ+ukh7zd7QuHvYk=; b=X3Xxdqgv/cgatkx6bKCq22bsDyuGIIFuutQU1wa2874aUSk8GjJZaziUZfVG9XXLdrI4V 2OUJDOleRQVwLd7Cw== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=lespinasse.org; i=@lespinasse.org; q=dns/txt; s=srv-11-rsa; t=1617759903; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding : from; bh=VxqJ3bt6CreFlT+E4DjXvWhsZS5gJ+ukh7zd7QuHvYk=; b=bt136Q8H0jbNSpwOh6Dm3mmUCo51a8AE75Ga5NiYl+NqjmDdqfmbcMcqVRCabeL568R29 QOV1rl19/dycIxYj6qjh5xGGTb3JZcZseB4ugflSTEx91ZKfCqN1yNS+gNUcjEe70Tjov8O jSOu/5mupmTj/x2dv6Jj/fvMkZ7DljWhsoae5tgXf2v17pkoqhqMGUHetO/9qIvSHqf0IB3 43aCaoZX9oubJLJZkd+NJnnie6w1ZqcrAHGbxuTWPlHsB7G4O2657zl+ev+3Pdv9MKz8N8l L39OQy2kIRL9HG0UzDQQJhoLw44rV7Cq+5tzxdGWfWNoaM4jIuwHLRFc02YQ== Received: from zeus.lespinasse.org (zeus.lespinasse.org [10.0.0.150]) by server.lespinasse.org (Postfix) with ESMTPS id 09034160356; Tue, 6 Apr 2021 18:45:03 -0700 (PDT) Received: by zeus.lespinasse.org (Postfix, from userid 1000) id EF43A19F31D; Tue, 6 Apr 2021 18:45:02 -0700 (PDT) From: Michel Lespinasse To: Linux-MM Cc: Laurent Dufour , Peter Zijlstra , Michal Hocko , Matthew Wilcox , Rik van Riel , Paul McKenney , Andrew Morton , Suren Baghdasaryan , Joel Fernandes , Rom Lemarchand , Linux-Kernel , Michel Lespinasse Subject: [RFC PATCH 22/37] mm: enable speculative fault handling through do_swap_page() Date: Tue, 6 Apr 2021 18:44:47 -0700 Message-Id: <20210407014502.24091-23-michel@lespinasse.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210407014502.24091-1-michel@lespinasse.org> References: <20210407014502.24091-1-michel@lespinasse.org> MIME-Version: 1.0 X-Stat-Signature: enyraddzj66yusyukg4nj66wwbky8gmd X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 54217E000110 Received-SPF: none (lespinasse.org>: No applicable sender policy available) receiver=imf05; identity=mailfrom; envelope-from=""; helo=server.lespinasse.org; client-ip=63.205.204.226 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1617759907-970127 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Change do_swap_page() to allow speculative fault execution to proceed. Signed-off-by: Michel Lespinasse --- mm/memory.c | 5 ----- 1 file changed, 5 deletions(-) diff --git a/mm/memory.c b/mm/memory.c index ab3160719bf3..6eddd7b4e89c 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -3340,11 +3340,6 @@ vm_fault_t do_swap_page(struct vm_fault *vmf) vm_fault_t ret = 0; void *shadow = NULL; - if (vmf->flags & FAULT_FLAG_SPECULATIVE) { - pte_unmap(vmf->pte); - return VM_FAULT_RETRY; - } - #if defined(CONFIG_SMP) || defined(CONFIG_PREEMPTION) if (sizeof(pte_t) > sizeof(unsigned long)) { /*