From patchwork Sun Nov 24 21:12:22 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pavel Begunkov X-Patchwork-Id: 13884193 Received: from mail-wm1-f51.google.com (mail-wm1-f51.google.com [209.85.128.51]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 98754156960 for ; Sun, 24 Nov 2024 21:12:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.51 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732482730; cv=none; b=BS7mO2gGkYjYUWh+7AuvmgCCsShllQ4Q7iN5qJ8rSMkl2gw3c1AriKjYrSwMhSmoIeOG15s6drXHXj1StKn8p6dCttRK+CmKOOxkdYTOXcKrx2CjAAuCnA8fFNYkNVR+WfylVBY5YTeyEN7Aunp7YITmi7g6+KiWeZLg/L3fGaA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732482730; c=relaxed/simple; bh=A/BG30k4dPSYeGyQ9WWlDhGgvjjruOFJ2EsBN5g0230=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=eHv6Fy2Cn5WJLBwFQQ7HZagiHRCjxa71M+zB6/ElxeQvd++5OKar7++6TiFdLUH8mXCn6xRR31Eyie8vEt+SDWWKzb0PyLpt/4hSIXSnMxrWwW87skiSaHNazU8FRaYtI1oFKrz8fGD8D84Mx7iYOMbjJiUzDkeP6RnTCK5FwZ4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=FgkExJsN; arc=none smtp.client-ip=209.85.128.51 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="FgkExJsN" Received: by mail-wm1-f51.google.com with SMTP id 5b1f17b1804b1-43152b79d25so34026435e9.1 for ; Sun, 24 Nov 2024 13:12:08 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1732482726; x=1733087526; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=5cQnp+lrUnHITWCsKfUZMU+VFdBNN5rUz4oDhu1P1PU=; b=FgkExJsNOiPu6+InZ1AyoMXm4nBYqwFVGiN5/tcppV388zig4UypsP6z9Yl8FnAZAF MZiJcRUXVWHrtwHzasblZgPNuRGSN7w2pOV+xKe2w6W0k/72e0DmX+GwC7TK2XgV+HtH BD6SDRWmce7KE7DEYCee0C+JIdLUci+izY4XVsjc0qDRRclRKnMfSQM20i8jSAsNPfDf 0xDrrg48C+yAVr9VZhGZ7HFkFrppwyq6aJ0M5eZSkUnrtTN9eKAS9a8m2mgZdVxvhPn+ OyOoIRSqHb1XLAhXbZSHg37lH6w/dQEFfzPZSbYtq6nUwDmpk1/xnJzuXMLogw8RR9jo xUrg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1732482726; x=1733087526; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=5cQnp+lrUnHITWCsKfUZMU+VFdBNN5rUz4oDhu1P1PU=; b=j9m0UBuxmQvdFDDjGVU4rkJcgc4gFFyIsAdo3GoiT1lVNvSyNoDdvDBTYqcyadcDNW DO6njE/BVXz3BgtG6q6LHnYgWDQmNv8Unkn62xn/7UKTyCm0fZeGSGxLWldOiJrBsVtQ RiEYvr5Nx7sbaxJIrrOS1fEE7FFMx6JKwUAoEFeOVbn4QtYsh35nX4O2QtqTGZ/5HMQv j8vj+25WarGfHkcatFDi2di6SDJnpLomCGuHpSXyYPbToUAEn0cVJQDy97uFJ2fW/Q2F Iq+aE0WgxTgsdD8QG9QoVqmVAfbnRMD1RSH9WQctE8AaIL8D2DoUvyXku/8drOqRuNF+ 0IwA== X-Gm-Message-State: AOJu0Yxe+niQgfp+dyLB3kPeE3I8cwGetwiLW7uWKvKBy4pUf3aIqNjE iqr+09svBrbX5zWV54Rvo0QUSrv5IOdaY3HJJJXTEJlHyoIMLU/Uyl9Afw== X-Gm-Gg: ASbGncvXq0T7N1OzsfRqQ0m9Sk+NCx0yyLOA7Fvo+vtkGRqCAmJwhcVcMwxzl7COQ4d MAqnTK4PDPWHcc4FIznHoUUclflmd9H04GVS6ScgHjKks/bB2revAtZhPno7fmJyU3Uvrrw+cBf 75je9caXwcobVXQxooGi2fLpdwi2E24VhW0WSjxkpe5o57JEEq/eq4DIFoNo3n4pzAfWU/AwZow LJdKsNdJYTCmWEHHBI8s7Cn7dAYw7wajLC6VcQnT0y0klxSNADkXH1VUHq+KFw= X-Google-Smtp-Source: AGHT+IHiFkzJjuDs4LcWCvAlzsfaVRFGPRDADzkmwlHomkgvLWXqzHuA7E1fgdkW7vZy49e35L+VgQ== X-Received: by 2002:a05:600c:3b19:b0:42c:bae0:f05b with SMTP id 5b1f17b1804b1-433ce413c8emr78182685e9.1.1732482726372; Sun, 24 Nov 2024 13:12:06 -0800 (PST) Received: from 127.0.0.1localhost ([85.255.235.224]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-432f643b299sm132733745e9.0.2024.11.24.13.12.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 24 Nov 2024 13:12:05 -0800 (PST) From: Pavel Begunkov To: io-uring@vger.kernel.org Cc: asml.silence@gmail.com Subject: [PATCH v2 05/18] io_uring/memmap: account memory before pinning Date: Sun, 24 Nov 2024 21:12:22 +0000 Message-ID: <686422cc34b24ffd682abd6443904d18c0d0e06b.1732481694.git.asml.silence@gmail.com> X-Mailer: git-send-email 2.46.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Move memory accounting before page pinning. It shouldn't even try to pin pages if it's not allowed, and accounting is also relatively inexpensive. It also give a better code structure as we do generic accounting and then can branch for different mapping types. Signed-off-by: Pavel Begunkov --- io_uring/memmap.c | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-) diff --git a/io_uring/memmap.c b/io_uring/memmap.c index f76bee5a861a..cc5f6f69ee6c 100644 --- a/io_uring/memmap.c +++ b/io_uring/memmap.c @@ -243,17 +243,21 @@ int io_create_region(struct io_ring_ctx *ctx, struct io_mapped_region *mr, if (check_add_overflow(reg->user_addr, reg->size, &end)) return -EOVERFLOW; - pages = io_pin_pages(reg->user_addr, reg->size, &nr_pages); - if (IS_ERR(pages)) - return PTR_ERR(pages); - + nr_pages = reg->size >> PAGE_SHIFT; if (ctx->user) { ret = __io_account_mem(ctx->user, nr_pages); if (ret) - goto out_free; + return ret; pages_accounted = nr_pages; } + pages = io_pin_pages(reg->user_addr, reg->size, &nr_pages); + if (IS_ERR(pages)) { + ret = PTR_ERR(pages); + pages = NULL; + goto out_free; + } + vptr = vmap(pages, nr_pages, VM_MAP, PAGE_KERNEL); if (!vptr) { ret = -ENOMEM; @@ -268,7 +272,8 @@ int io_create_region(struct io_ring_ctx *ctx, struct io_mapped_region *mr, out_free: if (pages_accounted) __io_unaccount_mem(ctx->user, pages_accounted); - io_pages_free(&pages, nr_pages); + if (pages) + io_pages_free(&pages, nr_pages); return ret; }