From patchwork Wed Apr 2 14:59:55 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Wilcox X-Patchwork-Id: 14036124 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) (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 64EFD23C8AD; Wed, 2 Apr 2025 15:00:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.50.34 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743606016; cv=none; b=ShimyzcyVvpHKvgz4XitjPyDkt5tP/1oi1kG+nm7D5ogUvNw6HI4vpSEkaZmGG3NK3e18KWM96BI2OubxYGxhjG7omewI4rRiGpHBPVQpJuHQyYdYItIPOtcKrq2JsQ4vFRtwWys1IO6imt8TpFU/YYW1Jb68Hl3elbCvpFlN5g= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743606016; c=relaxed/simple; bh=isEtce1XzbwTB4+VX7772Pt07KMqxmVCirBGrNO7B/w=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=VNKZi/By3ydh56pcU0JYCU9KH/w747zmnNfqwf+h7OoctyDNbJnvCYCzkLH2coCRUiicH5XLdsyiSzkgN5DAYtr43xGqrquMzp0Ra8VkJZPEIf1XdElp59KfJ+WDdBC2uR52DADfTeyNhCfSGQwfvNE6w8h64P37opEsPYFWc4A= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=DFlhRkJZ; arc=none smtp.client-ip=90.155.50.34 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="DFlhRkJZ" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=H/LzOSBZMJnPa9n+hJhMKcetVnuAU/qb1xOh1kNA3po=; b=DFlhRkJZvk0FxUhTFpLMVcqGW6 xG1V3XXL/3wXAn/c2FOYw2EQMYqW/olCsErvNjPUKfLGXt+KADdT2YskzUX3BUzbnyAagDDYzB/fm ZR4Q9IpNbzkJL3GnwtfzS0XcEfD/32j2Dfmitv5ap5a8XrmQ8JcS7Kf2QXPDc3sqfLLqaVqVAynw3 SVXXASaClM2+3ASDNUleyBPQi3HXCWxVaxx8xZiTEgWj5/FavNMrcjK/FGXAxKgWhUbSiBa86JP8X ULsI58AmQLxczl1eK++kle8TpZzr4ssoKT0HwbiRLd+lve1N9BIfdY9N8jDECSQ2yYLh8qLlIA9Mb nT2UhlgQ==; Received: from willy by casper.infradead.org with local (Exim 4.98.1 #2 (Red Hat Linux)) id 1tzzZX-00000009gs7-0PTo; Wed, 02 Apr 2025 15:00:07 +0000 From: "Matthew Wilcox (Oracle)" To: linux-fsdevel@vger.kernel.org Cc: "Matthew Wilcox (Oracle)" , intel-gfx@lists.freedesktop.org, linux-mm@kvack.org, dri-devel@lists.freedesktop.org, stable@vger.kernel.org, David Howells , v9fs@lists.linux.dev Subject: [PATCH v2 1/9] 9p: Add a migrate_folio method Date: Wed, 2 Apr 2025 15:59:55 +0100 Message-ID: <20250402150005.2309458-2-willy@infradead.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250402150005.2309458-1-willy@infradead.org> References: <20250402150005.2309458-1-willy@infradead.org> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The migration code used to be able to migrate dirty 9p folios by writing them back using writepage. When the writepage method was removed, we neglected to add a migrate_folio method, which means that dirty 9p folios have been unmovable ever since. This reduced our success at defragmenting memory on machines which use 9p heavily. Fixes: 80105ed2fd27 (9p: Use netfslib read/write_iter) Cc: stable@vger.kernel.org Cc: David Howells Cc: v9fs@lists.linux.dev Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: David Howells Acked-by: Dominique Martinet --- fs/9p/vfs_addr.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/9p/vfs_addr.c b/fs/9p/vfs_addr.c index 32619d146cbc..1286d96a29bc 100644 --- a/fs/9p/vfs_addr.c +++ b/fs/9p/vfs_addr.c @@ -164,4 +164,5 @@ const struct address_space_operations v9fs_addr_operations = { .invalidate_folio = netfs_invalidate_folio, .direct_IO = noop_direct_IO, .writepages = netfs_writepages, + .migrate_folio = filemap_migrate_folio, };