From nobody Sun Oct 5 23:38:24 2025 Received: from mail.smrk.net (mail.smrk.net [45.76.87.244]) (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 912E64A11; Mon, 28 Jul 2025 18:37:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.76.87.244 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753727866; cv=none; b=XYUPmflfgv0t07lUmw0q1YEmPTHVYbywm8mDG5o8P7GsPvFH5srGI+t5XRvFN+OsBiQJWCTT8U7jkja1bzqwEl/1/UbZpmtqAiEm0YZ5Wh5FaC0pHfPAulAMLq2s9tDhckn8Dv61pkzI80RtTU/6fLNbkLR+GPTFkYu23PkiOn8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753727866; c=relaxed/simple; bh=P5DDh7c6UJ4D4+NjwCwZk2I6DNLm/C2wn8jkMDxS96M=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:To:Cc; b=inK/FuYw7wIIMifqFPmSRVTKSSxCnlrEwkuiE8sifsjoQEvfkPv54Xl1kg9ixl9JzRAjG0K0xEnBuSU3hIK8+y2OIwelM9xwz+s+7c+pFmYiShuiCGU6WhiMW2MsyV/1xdJVs8iEs0OeYsUDJbMCCFbJ6Aquml6CUF6rb5uQC/Q= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=smrk.net; spf=pass smtp.mailfrom=smrk.net; dkim=pass (2048-bit key) header.d=smrk.net header.i=@smrk.net header.b=Rfd3+xPc; arc=none smtp.client-ip=45.76.87.244 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=smrk.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=smrk.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=smrk.net header.i=@smrk.net header.b="Rfd3+xPc" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=smrk.net; s=20221002; t=1753727460; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=/P+lLMMRUQ1gMBLqbN9Ho2BJrRqcrV6Qq51DcGJe+Jo=; b=Rfd3+xPc3vnT7KINOIVel9EhP+F+aQs+/mqNWhlTCtEPSRyIDU9jJh7nIMX8JsqVIBYfOX MseULV9M2khcRmZtFSPiHmi+u+aAQHnH4coWGmJ6WEN9ySciScwvn35D056Ro0IGbmTkj5 bCPpr32S2DC4nEZRg6kK8UMRnTtKouT/OM9jp+KkieM0kUhvcCehl5Z5cpN1GHCpsKPA/4 zfEpvp86KSe8eHwnSp8zTn8v+Z2amhmUFJjY6gDMWPJi0raOHu+36z07y3rRBiG1wTw5eT P6GougDX80beTWlaiPeZuN0YLBXaaNOKQcSzxmW2y1sk2NTt5fYceFL9gJyGKw== Received: from localhost ( [192.168.5.2]) by smrk (OpenSMTPD) with ESMTPSA id a0d628f2 (TLSv1.3:TLS_AES_256_GCM_SHA384:256:NO); Mon, 28 Jul 2025 20:30:59 +0200 (CEST) From: =?utf-8?q?=C5=A0t=C4=9Bp=C3=A1n_N=C4=9Bmec?= Date: Mon, 28 Jul 2025 20:30:33 +0200 Subject: [PATCH] docs: admin-guide: update to current minimum pipe size default Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250728-pipedoc-v1-1-2dae082a56f5@smrk.net> X-B4-Tracking: v=1; b=H4sIAMjBh2gC/6tWKk4tykwtVrJSqFYqSi3LLM7MzwNyDHUUlJIzE vPSU3UzU4B8JSMDI1MDcyML3YLMgtSU/GTd1BRjcwvL5GQTo5RkJaDqgqLUtMwKsEnRsbW1AEx KxyxZAAAA X-Change-ID: 20250728-pipedoc-ed3789cc42dc To: Jonathan Corbet Cc: "Alex Xu (Hello71)" , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, =?utf-8?q?=C5=A0t=C4=9Bp=C3=A1n_N=C4=9Bmec?= X-Mailer: b4 0.14.2 Fixes: 46c4c9d1beb7 ("pipe: increase minimum default pipe size to 2 pages") Signed-off-by: =C5=A0t=C4=9Bp=C3=A1n N=C4=9Bmec --- The relevant man page was updated in 7543e84442d7 ("pipe.7: Document change to default pipe size when soft limit= is exceeded") https://lore.kernel.org/linux-man/20240829204448.2027276-2-kstewart@efficio= s.com/ --- Documentation/admin-guide/sysctl/fs.rst | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/Documentation/admin-guide/sysctl/fs.rst b/Documentation/admin-= guide/sysctl/fs.rst index 6c54718c9d04ba0e690d064bc50f97ef883234fa..9b7f65c3efd8020d62df5b00388= c48f2435da3e3 100644 --- a/Documentation/admin-guide/sysctl/fs.rst +++ b/Documentation/admin-guide/sysctl/fs.rst @@ -164,8 +164,8 @@ pipe-user-pages-soft -------------------- =20 Maximum total number of pages a non-privileged user may allocate for pipes -before the pipe size gets limited to a single page. Once this limit is rea= ched, -new pipes will be limited to a single page in size for this user in order = to +before the pipe size gets limited to two pages. Once this limit is reached, +new pipes will be limited to two pages in size for this user in order to limit total memory usage, and trying to increase them using ``fcntl()`` wi= ll be denied until usage goes below the limit again. The default value allows to allocate up to 1024 pipes at their default size. When set to 0, no limit is --- base-commit: 038d61fd642278bab63ee8ef722c50d10ab01e8f change-id: 20250728-pipedoc-ed3789cc42dc