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 X-Spam-Level: X-Spam-Status: No, score=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 9D9AFC433B4 for ; Tue, 20 Apr 2021 03:52:16 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id D248760E08 for ; Tue, 20 Apr 2021 03:52:15 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D248760E08 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ellerman.id.au Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 2D77C6B0036; Mon, 19 Apr 2021 23:52:15 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 2871F6B006E; Mon, 19 Apr 2021 23:52:15 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 128646B0070; Mon, 19 Apr 2021 23:52:15 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0132.hostedemail.com [216.40.44.132]) by kanga.kvack.org (Postfix) with ESMTP id EB4966B0036 for ; Mon, 19 Apr 2021 23:52:14 -0400 (EDT) Received: from smtpin28.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id A47AE3638 for ; Tue, 20 Apr 2021 03:52:14 +0000 (UTC) X-FDA: 78051372588.28.3AEA7AD Received: from ozlabs.org (bilbo.ozlabs.org [203.11.71.1]) by imf29.hostedemail.com (Postfix) with ESMTP id 8888D13A for ; Tue, 20 Apr 2021 03:52:11 +0000 (UTC) Received: from authenticated.ozlabs.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mail.ozlabs.org (Postfix) with ESMTPSA id 4FPVB16W3zz9vDk; Tue, 20 Apr 2021 13:52:09 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ellerman.id.au; s=201909; t=1618890730; bh=JyUPdJZxbZgHgX4tkHtmFJhqOryC3EPN3KyRky8WqXw=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=BBlX2djaIi85USp/MUgi221lvmsRpNhGjSJ1EziQm782np4YWLIjeeX7AVtIuh+r2 pC3XnF9/h7yU50pgul5lIDrS9qo4unh0rT/Mk/51s8ncPFjkMQmkFwzZxqNBl5DSmr ErPYGnT55M1JvzhalKvWe8ViBp+GnRaOGFec/7cX3GCWzBkw7jD2D8wFL9fOh0hQRd +MP7a/HhKdQngfuPXftKDTrc+ZNEf8MoZIH4tyRYfaC21WQ16mmqXHBoFu4Rg9S0Gy SkShzcfffQev9STnhgzC++uv0ZEZOqLeRts4hdqP3GZqa9Tn5dh29hDg7dLMEFoPxn RdyW+O//TSydw== From: Michael Ellerman To: "Aneesh Kumar K.V" , linux-mm@kvack.org, akpm@linux-foundation.org Cc: linuxppc-dev@lists.ozlabs.org, kaleshsingh@google.com, npiggin@gmail.com, joel@joelfernandes.org, "Aneesh Kumar K.V" Subject: Re: [PATCH v4 8/9] mm/mremap: Allow arch runtime override In-Reply-To: <20210414085915.301189-9-aneesh.kumar@linux.ibm.com> References: <20210414085915.301189-1-aneesh.kumar@linux.ibm.com> <20210414085915.301189-9-aneesh.kumar@linux.ibm.com> Date: Tue, 20 Apr 2021 13:52:09 +1000 Message-ID: <87bla9d34m.fsf@mpe.ellerman.id.au> MIME-Version: 1.0 Content-Type: text/plain X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 8888D13A X-Stat-Signature: hmmiozbwhp4encjdtw5jokmhnbas37yd Received-SPF: none (ellerman.id.au>: No applicable sender policy available) receiver=imf29; identity=mailfrom; envelope-from=""; helo=ozlabs.org; client-ip=203.11.71.1 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1618890731-411544 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: "Aneesh Kumar K.V" writes: > Architectures like ppc64 support faster mremap only with radix > translation. Hence allow a runtime check w.r.t support for fast mremap. > > Signed-off-by: Aneesh Kumar K.V > --- > arch/powerpc/include/asm/tlb.h | 6 ++++++ > mm/mremap.c | 15 ++++++++++++++- > 2 files changed, 20 insertions(+), 1 deletion(-) > > diff --git a/arch/powerpc/include/asm/tlb.h b/arch/powerpc/include/asm/tlb.h > index 160422a439aa..058918a7cd3c 100644 > --- a/arch/powerpc/include/asm/tlb.h > +++ b/arch/powerpc/include/asm/tlb.h > @@ -83,5 +83,11 @@ static inline int mm_is_thread_local(struct mm_struct *mm) > } > #endif > > +#define arch_supports_page_tables_move arch_supports_page_tables_move > +static inline bool arch_supports_page_tables_move(void) > +{ > + return radix_enabled(); > +} Not sure it's worth a respin on its own, but page table*s* move is slightly strange phrasing. arch_supports_move_page_tables() or arch_supports_page_table_move() would be more typical. cheers