From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-yb1-xb2e.google.com (mail-yb1-xb2e.google.com [IPv6:2607:f8b0:4864:20::b2e]) by sourceware.org (Postfix) with ESMTPS id 50B073858D33 for ; Tue, 7 Nov 2023 18:15:58 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 50B073858D33 Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=dneg.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=dneg.com ARC-Filter: OpenARC Filter v1.0.0 sourceware.org 50B073858D33 Authentication-Results: server2.sourceware.org; arc=none smtp.remote-ip=2607:f8b0:4864:20::b2e ARC-Seal: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1699380959; cv=none; b=LbBq6vNio67JFokc0BCSjs7wQZYPsRQRmvVN0k+zU2Y7XlTWl/N7rIXr+d81syIpzv/Bcc5boTp8dscRBZeYyat10AovOk9NTe5f8E40FHCcSVMOUskMs2Vkm8LtVDcSTwoDIOlqOsSUACvKyUyeXZqrimINDTo8+ocVSHfFlrk= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1699380959; c=relaxed/simple; bh=8I99JguKtVRuYojbG1sLLw0/z1IhBr8bXmCuydfppLA=; h=DKIM-Signature:MIME-Version:From:Date:Message-ID:Subject:To; b=QWntpeCbcha5SKanWTgi51blnqjI08vMv6vMmU9TMXsEvWdWL2onw0KrE6rVHU5bGbzBe3RTJ4o7o8ucTTzdzhQTG4aXAcxKqn3Y9emw0U94AgsfYWqeBpsuMxX/u0QOIMIlI3SVJ4BgaQ6ONsp0zlsZxcRZ6zWyc1LjGKWtiaI= ARC-Authentication-Results: i=1; server2.sourceware.org Received: by mail-yb1-xb2e.google.com with SMTP id 3f1490d57ef6-da3b4b7c6bdso6184609276.2 for ; Tue, 07 Nov 2023 10:15:58 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=dneg.com; s=google; t=1699380957; x=1699985757; darn=sourceware.org; h=to:subject:message-id:date:from:mime-version:from:to:cc:subject :date:message-id:reply-to; bh=8I99JguKtVRuYojbG1sLLw0/z1IhBr8bXmCuydfppLA=; b=hIT1i7OGV9215PEO2WJmBrVI7RtTw7Rb+52qgdHI/r9P/VcMEzCZh1dAX79JU1agFC iXMobCJnSE1PGCK6vtuf+BwUcoOzHUJcFHm5fbaWgYP8bmtPZE8INLS0iCMtaHh7D53E o5HscxJEEJXEJs8n7dYiATZSNuuBnmfdSduuA8/zuOXiPmLCr/c/mMo1GKY7VEfLdSPH wK0/dL1MzNnqdkKCwgkzB50adxuuhhWJsQff5zlB1oQIY2TGcqy6cWDOTm9razw0+6U+ PxFfD80kqTO0kinJB67Se8D7s+cO0mIj5BwR5uB8qBp88IIl375O4+rL1oE/ceO2X10H eURw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1699380957; x=1699985757; h=to:subject:message-id:date:from:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=8I99JguKtVRuYojbG1sLLw0/z1IhBr8bXmCuydfppLA=; b=TFCfW6ndD09NhUiJaBfmvWxONqP7o3+tBoW33rPTUT3g6wsRxdxebO0V1acNqTuv1a 4Gi2nL1HkAMo/EL2fYixrgVNFbSYvcNSUVjKwnZ7Y42raj1SkLOdDZV089hdQjKUcvEX wuPLyO06fJ8ZnPKpRHHAJctM8vcpoUM3WTlM2kvp0tapA/ZWYGbXnZT9Ey3hCrXW9s4B +sNldtCNr4v4XI0GzUdif5wvjCpPBRIuXUJLI7cA+5QB+G7UdwuF4Ke0mKT7dLlJkLW5 vkHuy+ogTV0jtWhpnIlBbUthA7ByFH/+8KVa47xyQx+lQUc/lF1Q9m7Cn0LBpRWDyPGH OF8g== X-Gm-Message-State: AOJu0YzuZYhKJRMmyKTuouF+1MmNZnKalpOG0ismSggolFAwgw8kwUtd 6Nt2m8jaKbiWPUk22PWQWhL79Rbp9akFqlVXt/EbUmtUUagHcWgHayA= X-Google-Smtp-Source: AGHT+IEARtNSgcOg14bP5umj3FThaXthaLx9oSA28q6k/qZkMoElSZGIJdlcIsfpX/UOXevgvzBk/GfG53y/Xbj4m18= X-Received: by 2002:a25:bb0c:0:b0:d9a:cd50:b99a with SMTP id z12-20020a25bb0c000000b00d9acd50b99amr30120871ybg.12.1699380957451; Tue, 07 Nov 2023 10:15:57 -0800 (PST) MIME-Version: 1.0 From: Daire Byrne Date: Tue, 7 Nov 2023 18:15:21 +0000 Message-ID: Subject: writev + bytes_to_write cast error on newer kernels To: systemtap Content-Type: text/plain; charset="UTF-8" X-Spam-Status: No, score=-0.3 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS,TXREP,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: Hi, I have a script that used to work fine on older kernels but does not seem to work with newer kernels. For example, on RHEL8 with systemtap 4.8: stap --ldd -e 'probe vfs.writev{printf("DEBUG size: %d\n", bytes_to_write)}' But running the same code on a v6.3.7 kernel I get this: ERROR: read fault [man error::fault] at 0x7f0397e604f8 near operator '@cast' at /opt/rh/devtoolset-11/root/usr/share/systemtap/tapset/linux/vfs.stp:138:11 WARNING: Number of errors: 1, skipped probes: 0 WARNING: /opt/rh/devtoolset-11/root/usr/bin/staprun exited with status: 1 At a guess, more breakage due to folios in newer kernels? Cheers, Daire