From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtpbgjp3.qq.com (smtpbgjp3.qq.com [54.92.39.34]) (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 15D42FBF6 for ; Wed, 26 Nov 2025 08:45:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=54.92.39.34 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764146752; cv=none; b=RiGYcY3g3Wcp1M4vWKVCQ3uPAd2rj3y15TyYrOkmcisPNsCqa9edlYkdweskDk2rMVpElR8mkaEHdzubZuZLpAXXnDky/OlTrqQx8WLKcQ9iXxp3zJi2kYIcIvtGjFomd2JNkmU9vaCUhiS/RhpV3JqqiAYM62tiCcZTXn7mpsE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764146752; c=relaxed/simple; bh=f6lheidUI8Gk3n4ZEbGGvfyB+hllcL6YV6tccm9zfPM=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=JNliKf59EAMZxzuy+M/NXt9cyVZpJjzia7kcgSFiafo3x/AdpWKhZ1uxRZMKu8EdQEJUM/UGQnsQV/zijg1MSfoQFT+IAFi+2nJ+tepPXaaPUnuVepH+UR6ZpohwRRojILk2AqVvWX3bWRMUxmdbJ4KYHEmk6gquhO32ooB9tvI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=uniontech.com; spf=pass smtp.mailfrom=uniontech.com; dkim=pass (1024-bit key) header.d=uniontech.com header.i=@uniontech.com header.b=R8uzIO7f; arc=none smtp.client-ip=54.92.39.34 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=uniontech.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=uniontech.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=uniontech.com header.i=@uniontech.com header.b="R8uzIO7f" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=uniontech.com; s=onoh2408; t=1764146709; bh=7b1v+VfWdS9vnI3hgHts2MCpC3pXD6k/AqQcBNZpi3w=; h=From:To:Subject:Date:Message-Id:MIME-Version; b=R8uzIO7fNJMx+rQyxcix3eaALrK3QmnP/uBzIAIEVjX80H79g1EMNuLAEQBPw00un r8zGdvZZJzVCOQI9SzRwruvQNHmNszomQnbanHFT8U9zpYJpNI5IUzbengaec60MfP jB2yhJk5oAJ9ozTuXU+74ks0mFjYiJ/8nuUM4xXU= X-QQ-mid: zesmtpgz7t1764146705t92bcfc87 X-QQ-Originating-IP: LjE2iX/jIr2kW4U183fcosGl+esKkN4mwkn8InklZ9k= Received: from localhost.localdomain ( [123.114.60.34]) by bizesmtp.qq.com (ESMTP) with id ; Wed, 26 Nov 2025 16:45:03 +0800 (CST) X-QQ-SSF: 0000000000000000000000000000000 X-QQ-GoodBg: 1 X-BIZMAIL-ID: 14949448011716842836 EX-QQ-RecipientCnt: 5 From: Qiang Ma To: akpm@linux-foundation.org, bhe@redhat.com Cc: kexec@lists.infradead.org, linux-kernel@vger.kernel.org, Qiang Ma Subject: [PATCH v3 0/3] kexec: print out debugging message if required for kexec_load Date: Wed, 26 Nov 2025 16:44:24 +0800 Message-Id: <20251126084427.3222212-1-maqianga@uniontech.com> X-Mailer: git-send-email 2.20.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-QQ-SENDSIZE: 520 Feedback-ID: zesmtpgz:uniontech.com:qybglogicsvrsz:qybglogicsvrsz3b-0 X-QQ-XMAILINFO: MOSHzC1SiP/mFgoaNtdf5wbgdDIutKBV8hKBXDqn1dkLC1ozIeoQrVw3 7SwHJ2EPnEzNWuQRMLUmoneUM/3SCxxP4vPFivGocy5ewU38iasFXkWAzOlc+o9UR0b/K6i VqEIrRoJbMeMDVTDF2QOl0MwDz4cq80+LcN7HkW64Gcu/fFw04mgwFp8wr9ioE4qIwzhI3M FcIChIKYrHnNtRp9eMkr0/tqZlZEBvB6f8MOETd+e2q2oquAGl9u2L3c8BCEzGBZhbP+K7/ Bu8LLN5h765eIYaSbQ3t85/ZXjAkAUr899b/XNEYp6P3D+ufHFGIVgbq2rx5Qg2U3/gW9PV oGGv0dHO0+idxArxgRa6Pka5l9RykihqKyvtTqHt8ieyUmZH3bCTcg6xEJ4MD+elG+HDb83 rnQIWr/aZZ2KnoErm9tAhfNsUamrW3rAIQCAl4N9wLXFhEJCxLJ2pjG1ryrlYyq/DQaytPv cb02ok8XKcQdYrxy/ge3xhD8gRfkCCWE9Bb3vfb5EV5+LvZ8O4SNLmwTWPD2CvhFu+fyMjD JooXZPDmdVwlWKMLbEGA3Ij6ebcIQjN8uM8bMI37sBdYQP5v6Yhww2xkaViuiJ6JUp3Lup9 KrlC8BVkCQ8B7G2Rhn0P7RQW8wd4UDktXdYLw37ywUpzRlakWi0p9CwYDcKtxNhUznbNRNG Xs1+Rv9JBft5xnnuxojizQDeE/I2DG7jhcEeAQZb0uYCoHiGS08KcOSbRW+dgh2vesFY3Tt 7XFTyRscVEZjMa5gYZBvKihse/v8kKqzc4IXJEiRj4M6B7BKIQcuH+7TQmO1BX6NExHHTWd tkanz+yrPe82F626s1Ekhe2KmbdyoTiWbHArnm/Kn42/OO0i3tAHmmZnggSoUGjxBUFpnza kCStqXXevY3VtszfiIxq13ievHiqgixWBkAx0Ki2uxagOOsieaW8e4kA/YzbhoXOWBbmERb ZGuQzWbVGXk3IJ8TQj/r5UYmxU6qCaJUAu07gURmnhabEIt6zMr7+Cjq0skEgH/01TVZqwh 8lwAK4wVN7v3B3aHsyn+rdJsDvAnNC2AwSOnKKy+EHtxNv4gHdi/8KIBcHYoFRN6rg02ej9 w== X-QQ-XMRINFO: OWPUhxQsoeAVDbp3OJHYyFg= X-QQ-RECHKSPAM: 0 Overview: ========= The commit a85ee18c7900 ("kexec_file: print out debugging message if required") has added general code printing in kexec_file_load(), but not in kexec_load(). Since kexec_load and kexec_file_load are not triggered simultaneously, we can unify the debug flag of kexec and kexec_file as kexec_dbg_print. Next, we need to do some things in this patchset: 1. rename kexec_file_dbg_print to kexec_dbg_print 2. Add KEXEC_DEBUG 3. Initialize kexec_dbg_print for kexec 4. Fix uninitialized struct kimage *image pointer 5. Set the reset of kexec_dbg_print to kimage_free Testing: ========= I did testing on x86_64, arm64 and loongarch. On x86_64, the printed messages look like below: unset CONFIG_KEXEC_FILE: [ 81.502374] kexec: kexec_load: type:0, start:0x23fff7700 head:0x10a4b9002 flags:0x3e0010 set CONFIG_KEXEC_FILE [ 36.774228] kexec_file: kernel: 0000000066c386c8 kernel_size: 0xd78400 [ 36.821814] kexec-bzImage64: Loaded purgatory at 0x23fffb000 [ 36.821826] kexec-bzImage64: Loaded boot_param, command line and misc at 0x23fff9000 bufsz=0x12d0 memsz=0x2000 [ 36.821829] kexec-bzImage64: Loaded 64bit kernel at 0x23d400000 bufsz=0xd73400 memsz=0x2ab7000 [ 36.821918] kexec-bzImage64: Loaded initrd at 0x23bd0b000 bufsz=0x16f40a8 memsz=0x16f40a8 [ 36.821920] kexec-bzImage64: Final command line is: root=/dev/mapper/test-root crashkernel=auto rd.lvm.lv=test/root [ 36.821925] kexec-bzImage64: E820 memmap: [ 36.821926] kexec-bzImage64: 0000000000000000-000000000009ffff (1) [ 36.821928] kexec-bzImage64: 0000000000100000-0000000000811fff (1) [ 36.821930] kexec-bzImage64: 0000000000812000-0000000000812fff (2) [ 36.821931] kexec-bzImage64: 0000000000813000-00000000bee38fff (1) [ 36.821933] kexec-bzImage64: 00000000bee39000-00000000beec2fff (2) [ 36.821934] kexec-bzImage64: 00000000beec3000-00000000bf8ecfff (1) [ 36.821935] kexec-bzImage64: 00000000bf8ed000-00000000bfb6cfff (2) [ 36.821936] kexec-bzImage64: 00000000bfb6d000-00000000bfb7efff (3) [ 36.821937] kexec-bzImage64: 00000000bfb7f000-00000000bfbfefff (4) [ 36.821938] kexec-bzImage64: 00000000bfbff000-00000000bff7bfff (1) [ 36.821939] kexec-bzImage64: 00000000bff7c000-00000000bfffffff (2) [ 36.821940] kexec-bzImage64: 00000000feffc000-00000000feffffff (2) [ 36.821941] kexec-bzImage64: 00000000ffc00000-00000000ffffffff (2) [ 36.821942] kexec-bzImage64: 0000000100000000-000000023fffffff (1) [ 36.872348] kexec_file: nr_segments = 4 [ 36.872356] kexec_file: segment[0]: buf=0x000000005314ece7 bufsz=0x4000 mem=0x23fffb000 memsz=0x5000 [ 36.872370] kexec_file: segment[1]: buf=0x000000006e59b143 bufsz=0x12d0 mem=0x23fff9000 memsz=0x2000 [ 36.872374] kexec_file: segment[2]: buf=0x00000000eb7b1fc3 bufsz=0xd73400 mem=0x23d400000 memsz=0x2ab7000 [ 36.882172] kexec_file: segment[3]: buf=0x000000006af76441 bufsz=0x16f40a8 mem=0x23bd0b000 memsz=0x16f5000 [ 36.889113] kexec_file: kexec_file_load: type:0, start:0x23fffb150 head:0x101a2e002 flags:0x8 Changes in v3: ========== - Rename kexec_core_dbg_print to kexec_dbg_print - Remove unnecessary segments prints - Remove patch "kexec_file: Fix the issue of mismatch between loop variable types" Qiang Ma (3): kexec: Fix uninitialized struct kimage *image pointer kexec: add kexec flag to control debug printing kexec: print out debugging message if required for kexec_load include/linux/kexec.h | 9 +++++---- include/uapi/linux/kexec.h | 1 + kernel/kexec.c | 8 +++++++- kernel/kexec_core.c | 4 +++- kernel/kexec_file.c | 4 +--- 5 files changed, 17 insertions(+), 9 deletions(-) -- 2.20.1