From nobody Fri Dec 19 03:10:48 2025 Received: from mail-wr1-f74.google.com (mail-wr1-f74.google.com [209.85.221.74]) (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 8E84612CDA5 for ; Tue, 30 Apr 2024 11:14:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.74 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714475644; cv=none; b=tKaW8Rmic1dEbIytLEfsv6toIk/DVmpWydHWhhM1gVwetoo4/ay19vGZ+7MiBUZc5bTDpbhYrMLte9H+9FwzkZTy62GT/pvKkEswTZcPfmJehw1NgCHe6Z9uHcrhRFXBJEDg+bL7bNILP4knUwjs/qz8NfMroJn7L7he4jEo82w= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714475644; c=relaxed/simple; bh=l6oDZivJcyQTCOy+gknzagGu6pD9fjWdRZ/T8AH6uxk=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=Asch1JNKLfNv+SN3gIpXdaJ09warx3YokagTpCV+XZmoIbXnMcAV/0/SNghzYxbkaVJZEbD451RWPEPNhHmbr9ijdrSlllsztadmGVXLo9MzNRVJFEXUxuJkeiwQNY4DAAXQMBu2kq/PRL+oCCQ7jY7el7NY5LwSVh8MhppXvrw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--vdonnefort.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=nT+8gAA2; arc=none smtp.client-ip=209.85.221.74 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--vdonnefort.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="nT+8gAA2" Received: by mail-wr1-f74.google.com with SMTP id ffacd0b85a97d-349cafdc8f0so3335795f8f.1 for ; Tue, 30 Apr 2024 04:14:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1714475641; x=1715080441; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=RPOnWL9RPpAUuW6zSj0DHbUYz85VJ46LckD0gpweWUA=; b=nT+8gAA2qUrfL9l5//e+m1h2J/o7rGv6/m6hWNFVR2kVxqceQ6tUKoHdh5StxJO94A ZWwrCSMZZmS4yej8JCLUU2z/aW4RSma08IQkXRUXc5Wuanfdh+B685Qr9TMS/SCEus0e ZcQOcDyzSkfBYtuHhVu+dCjmN4VD/GbfbLhmBD2kWeD0+qY4wssFRwb6EiTPBErDdS6F GywbabcTHreEsPvy5a+UV8FVnuwYz3Ha9WQ4vrvAEH7kG4+aXFozF4yie9bgEuxZhbWo wxR9q/0krZaAECxYv/BHAPTIDq5yS9Mr+9mVUjinXt13YnbZHsGieeF0MU81g6PC+Yz7 RFMA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1714475641; x=1715080441; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=RPOnWL9RPpAUuW6zSj0DHbUYz85VJ46LckD0gpweWUA=; b=pT0EBMIkQG2uIeYOVm8YfplzcGBgU+lro6vrm0mt8ErqA3GTo6OHBodN8piPOFEdvk 2UurcO1e+aNyoJ7dAk0thdkP7J9dF/hXkaBcBJuAbSXQwX3vpas3rhIg3gOvtfX7tpwL 7XeWfkya9xPRxFWVC8Ph4GbAZIi/m3V0Hl02VKy7pSE519oDIYvrERMP71vjnduKOBWw en1NvBKp+Nwz97W1bVOmf/cwE4iZ55MhyLXld5C+xKM3I94cQ6zsg3USK+EMB1Y8Z0a5 5z0OMmKO+h7i+B16xFELx2+JH0zv+HMpRevA21bJVPYleB1IU0E4/KnistVdDXS7D+ZC CoIg== X-Forwarded-Encrypted: i=1; AJvYcCWME+hBdsgrt2jNzkjr4xyn9kmAqg88/3h7iFPa1eV+oOdzFWAKl8PM3UlBeuk3kDiSMrtWCA83KO8PwaAvSIwfIYAT2CuOHKqqt5j7 X-Gm-Message-State: AOJu0YwBYdf0wPEhxDBo1kSIetz0KW2RUrFh+W6syvvtH/XCtk4C+Zup Prnu3XW8qujwkUyBoNJ7qw/lXBC15EvUKcM8m0jit1v3dDIBeveaXQLj7/XhQo4BGKmzRGnLtO5 +iDuUpBpegZB3V+NQMw== X-Google-Smtp-Source: AGHT+IGg0qhb/Jba6e9SYF1X563jKL0wCkSy4jPLen+t6O0bQF5/hWi5hJTj+ZQVSBTh2zkExIaXqd4WY26ybQ/A X-Received: from vdonnefort.c.googlers.com ([fda3:e722:ac3:cc00:28:9cb1:c0a8:2eea]) (user=vdonnefort job=sendgmr) by 2002:a05:6000:d46:b0:34d:a111:5021 with SMTP id du6-20020a0560000d4600b0034da1115021mr1931wrb.1.1714475640882; Tue, 30 Apr 2024 04:14:00 -0700 (PDT) Date: Tue, 30 Apr 2024 12:13:50 +0100 In-Reply-To: <20240430111354.637356-1-vdonnefort@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20240430111354.637356-1-vdonnefort@google.com> X-Mailer: git-send-email 2.44.0.769.g3c40516874-goog Message-ID: <20240430111354.637356-2-vdonnefort@google.com> Subject: [PATCH v22 1/5] ring-buffer: Allocate sub-buffers with __GFP_COMP From: Vincent Donnefort To: rostedt@goodmis.org, mhiramat@kernel.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org Cc: mathieu.desnoyers@efficios.com, kernel-team@android.com, rdunlap@infradead.org, rppt@kernel.org, david@redhat.com, Vincent Donnefort Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" In preparation for the ring-buffer memory mapping, allocate compound pages for the ring-buffer sub-buffers to enable us to map them to user-space with vm_insert_pages(). Signed-off-by: Vincent Donnefort diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c index 25476ead681b..cc9ebe593571 100644 Acked-by: David Hildenbrand --- a/kernel/trace/ring_buffer.c +++ b/kernel/trace/ring_buffer.c @@ -1524,7 +1524,7 @@ static int __rb_allocate_pages(struct ring_buffer_per= _cpu *cpu_buffer, list_add(&bpage->list, pages); =20 page =3D alloc_pages_node(cpu_to_node(cpu_buffer->cpu), - mflags | __GFP_ZERO, + mflags | __GFP_COMP | __GFP_ZERO, cpu_buffer->buffer->subbuf_order); if (!page) goto free_pages; @@ -1609,7 +1609,7 @@ rb_allocate_cpu_buffer(struct trace_buffer *buffer, l= ong nr_pages, int cpu) =20 cpu_buffer->reader_page =3D bpage; =20 - page =3D alloc_pages_node(cpu_to_node(cpu), GFP_KERNEL | __GFP_ZERO, + page =3D alloc_pages_node(cpu_to_node(cpu), GFP_KERNEL | __GFP_COMP | __G= FP_ZERO, cpu_buffer->buffer->subbuf_order); if (!page) goto fail_free_reader; @@ -5579,7 +5579,7 @@ ring_buffer_alloc_read_page(struct trace_buffer *buff= er, int cpu) goto out; =20 page =3D alloc_pages_node(cpu_to_node(cpu), - GFP_KERNEL | __GFP_NORETRY | __GFP_ZERO, + GFP_KERNEL | __GFP_NORETRY | __GFP_COMP | __GFP_ZERO, cpu_buffer->buffer->subbuf_order); if (!page) { kfree(bpage); --=20 2.44.0.769.g3c40516874-goog