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[2001:8b0:10b:1231::1]) by mx.google.com with ESMTPS id w137si1181664itb.114.2019.05.28.01.01.59 for (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Tue, 28 May 2019 01:01:59 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of peterz@infradead.org designates 2001:8b0:10b:1231::1 as permitted sender) client-ip=2001:8b0:10b:1231::1; Authentication-Results: mx.google.com; dkim=pass header.i=@infradead.org header.s=merlin.20170209 header.b=AUfFmnK9; spf=pass (google.com: best guess record for domain of peterz@infradead.org designates 2001:8b0:10b:1231::1 as permitted sender) smtp.mailfrom=peterz@infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=5Anq1qwGKoGsIX6kb9ZWLK4o9JgSaVCCm8wVkC+oVCE=; b=AUfFmnK9XzeNtgYFLAw32vYpg uHV8PlXfVQ8TVUhu+7QmSiTGyVi9+JtQqh6ES2ANR77xHCPHIea/pNle1cd/kpxZs7jF/S0QPtYlh 4H+WGxCtJ588MjkDyGPi25GnNQuQ6g0qkn/2A4IAemeQAWpii2+4Vq1yDIzJBNuVQ17tCMsnWghwR HgA0EieTjD/ELwj3HL9UR3qjzAUkM6i47p4SCrEPQGdRwT0hS8OUEDiwEWiZQwRde+rmtEoPmOP46 GWKL83J16ZVG0bJYENsh+lIg5TwAG7fYcaMCjxdAUejy5dczD2i1PVruv7VulObHGR+3Rk7oDE+uS eG/JZb/bQ==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=hirez.programming.kicks-ass.net) by merlin.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1hVX3Q-0001oC-40; Tue, 28 May 2019 08:01:52 +0000 Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 8CAA52073CF8D; Tue, 28 May 2019 10:01:49 +0200 (CEST) Date: Tue, 28 May 2019 10:01:49 +0200 From: Peter Zijlstra To: Rick Edgecombe Cc: linux-kernel@vger.kernel.org, sparclinux@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, luto@kernel.org, dave.hansen@intel.com, namit@vmware.com Subject: Re: [PATCH v5 0/2] Fix issues with vmalloc flush flag Message-ID: <20190528080149.GJ2623@hirez.programming.kicks-ass.net> References: <20190527211058.2729-1-rick.p.edgecombe@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190527211058.2729-1-rick.p.edgecombe@intel.com> User-Agent: Mutt/1.10.1 (2018-07-13) 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: On Mon, May 27, 2019 at 02:10:56PM -0700, Rick Edgecombe wrote: > These two patches address issues with the recently added > VM_FLUSH_RESET_PERMS vmalloc flag. > > Patch 1 addresses an issue that could cause a crash after other > architectures besides x86 rely on this path. > > Patch 2 addresses an issue where in a rare case strange arguments > could be provided to flush_tlb_kernel_range(). Thanks!