From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793349488; b=h7N6ih179zguUzGgoRzfCrdQ6qDtOBwL5sephaUIrG5fEj2d/IRLLKVpGEnMKhEYIwd1 IYl2w47vjfp2NuLjqfSFyrnI8tTWETPacfWEMBx8qBLktJW4fLijEYEPKFETrqvy4dbIn Duvkm8jUuPPC1Ujwv+bczvcVfPeLs9iYA7v6NBUiyNFqsN7tlw7ifCsXzUwHEeCofQvfC BFXCjn07Nvz8/cIdoa8JtUnqG4ZfdceorF5kc/+DK9Mqh2Vgc8uMI2WDh2WDHavdn5XXh XwrsMrIFPblZbMYtXXi860ceAJRGIknxAhLSYpzxku5qfPpmjm0cd5nhOTFVEhDpFWQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793349488; h=Received:DKIM-Signature:Message-ID:From:Subject:Reply-To:To:Cc: In-Reply-To:References:Content-Type:Content-Transfer-Encoding:Date; bh=MDIB1CEJnE0DHs/6vW3NBj1AO185YaXA9DPJOErPHl4=; b=AYVQGG8wtLnhLLqlWnQDBttadG5ja3siZ0FzBH6LOR81UBIA4V5LOGD9XbY+aO4V/Ju2 MCC82Ncwo+SApr9JeKG8ATPK94WfhTwl5eaTry0OEqzlIwFqVj/2Y8T+l8DpD9ulVXoqV oszRkx26EODZbdJjgZ5v+6r6wghL/flVsyuz+fqfoeJrxZn1jXAyhamFLOB3ntNFH33KE J0SOG3sAGNSO30SFAyDAXRKyHtBwh6gfFI2x01YJHpjtoG/R6IcstaqO/H5QhgXDTat7T TM9KKMKIj72yPmUxmWRhmRN0ugfcq9PyK16CCkSHyiDwkDp4iuxTWxXM+QEq33ZX0ww== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b="L/FF6PVq"; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 94692606A31C for ; Fri, 30 Oct 2026 08:38:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=L/FF6PVq Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3597F1F000C1; Fri, 30 Oct 2026 08:38:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793349488; bh=MDIB1CEJnE0DHs/6vW3NBj1AO185YaXA9DPJOErPHl4=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=L/FF6PVq3bunY6pA79nGvWQS3I1clOxJ55a7gc09dcwdoty1J/1xf5abdakl+dIS3 CAKFL14fQIuhwQ69Pb+0rph1f3JJAsbWYy/51unLYbtknuK6rM/r8vTvUxmDY6L3ZB uQxSPgR2iIYVAEqH7Alz9n3SffioEkuprN07DzAj6sYDGI9Lsj8kA3O0SAVdP4zjoF iMcjouHK6m8kEOb5H08E7yMGSgzjnuGyolbBEAFp3M0lL2FLMXxGnJQD7DjYWAKo6u tQ5EINrQaT2PXo0W7mHqacG0Mn9Z5jmhUgEcIDPQmky/yptJIzxlTkfaC+fcXJ0gaO wNpGngiW0YRIA== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [PATCH v2 3/3] virtio_balloon: add tracepoints for free page hinting and migration Reply-To: sashiko-reviews@lists.linux.dev To: liuqiangneo@163.com Cc: virtualization@lists.linux.dev, "Michael S. Tsirkin" , "Eugenio Perez" In-Reply-To: <20261030083400.66005-4-liuqiangneo@163.com> References: <20261030083400.66005-1-liuqiangneo@163.com> <20261030083400.66005-4-liuqiangneo@163.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Fri, 30 Oct 2026 08:38:07 +0000 X-Mailing-List: virtualization@lists.linux.dev List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list > From: Qiang Liu >=20 > Free page hint requests cannot be traced, and migration only > provides summary stats. Lock contention causing migration abort > cannot be distinguished, making these two flows hard to debug. >=20 > Add tracepoints to record host hint commands, leftover hint blocks > and balloon_lock -EAGAIN migration failures. >=20 > Signed-off-by: Qiang Liu Sashiko has reviewed this patch and found no issues. --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20261030083400.6600= 5-1-liuqiangneo@163.com?part=3D3