From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from m16.mail.163.com (m16.mail.163.com [117.135.210.5]) by smtp.subspace.kernel.org (Postfix) with ESMTP id AD9E52907; Tue, 24 Sep 2024 12:38:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=117.135.210.5 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727181534; cv=none; b=QLj0xmQgNueZiFH3poravN64GBsTlEDfEet8j8J8x1YsEEFjEeu94KRRGx/AZ8l5hzbSpgCYVCUiR01Ju0se5jGfw1QtATTWPNJDEtwp0OebAjsIqMdLoYfr2SsWwMoFz+V5dO4KIP7BTEDsvU3l7i5oUoA+7lSAbQ/8D0q89gY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727181534; c=relaxed/simple; bh=faa6imd7lE6BcMFqO48/o3cyjsA9elv/WkwLO0G3rGU=; h=Date:From:To:Cc:Subject:In-Reply-To:References:Content-Type: MIME-Version:Message-ID; b=mrSe+elOZZOeUAdOsz/PULrqPBsUFHCWtBgblFdxApNPIozZgJ8C4PxO+86q7QwOfHxDYvmlZfql+N8FXZxqqF1NmQBxqpEbvOHMJ4owFOk+ZqUedVqWe7UPkRWU28x/Q9xbSTkzp9quJV3ZkTPn0Bj6dwVQbGUUUHzRf4zigao= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com; spf=pass smtp.mailfrom=163.com; dkim=fail (1024-bit key) header.d=163.com header.i=@163.com header.b=Qf2HxapK reason="signature verification failed"; arc=none smtp.client-ip=117.135.210.5 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=163.com Authentication-Results: smtp.subspace.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=163.com header.i=@163.com header.b="Qf2HxapK" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=Date:From:Subject:Content-Type:MIME-Version: Message-ID; bh=DIfNVk5CauZ6NK2yNcaBXApRTZBwvdPRcS24YcB8ZlY=; b=Q f2HxapKSw5RvNjGLAWQ0IhQg+k4PxwUsoPF/Ck9rzaw0AG7QNzNp0ubx2T75v/NN 4BZ3k9QEndoMaw+UVBwzQTxFdixZNyrn6BPKHaVPMKvAqC0SFH1QlBeQF6Rv7Yuu a8nwnwdCz0F0J1ubG7So/S8j5LoQY1/o1GzWn5BF9Y= Received: from 00107082$163.com ( [111.35.191.143] ) by ajax-webmail-wmsvr-40-136 (Coremail) ; Tue, 24 Sep 2024 20:38:29 +0800 (CST) Date: Tue, 24 Sep 2024 20:38:29 +0800 (CST) From: "David Wang" <00107082@163.com> To: "Kent Overstreet" Cc: linux-bcachefs@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [BUG?] bcachefs performance: read is way too slow when a file has no overwrite. 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