From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 14B9520458A for ; Tue, 4 Nov 2025 01:40:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762220414; cv=none; b=ooKJS4So3d+gV0bd9OpODmsdmYRn2SKCgg+zQc8YHwOCGPkCRVLdSNnOv+ge/kxMSWGhbvXkmxpRjXSGPw7FTNHThF/q1OUsJmR6H3BP99X3RQRFFlJCpsWDP0Ql6NcKH0/RoBTd9cnsdrBFzZpPjOTANHzKxG2Gd4kH0x+mh6E= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762220414; c=relaxed/simple; bh=v+TY2/Om37fP3IJ//vNC29+yXrqEc8qzku5hH2j+2SQ=; h=Date:To:From:Subject:Message-Id; b=m9HJXkJet+lAtQu9QdnT9N23Rfpdcdz4Wrq7fAS0zOUKmZ5TM3bEUsv8AMXUThfbRETDHVbHlSe2YRGvJFz0KF1CVpR85WLVzclP0jtTBfGQi5gZ/D9Ct9AmmonF7YdHdbSIu4yQCeGIFuFKzPe2Y6IUFxHuswM2cdl8m6tQ210= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=sNS4yx0Y; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="sNS4yx0Y" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8846BC4CEE7; Tue, 4 Nov 2025 01:40:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1762220413; bh=v+TY2/Om37fP3IJ//vNC29+yXrqEc8qzku5hH2j+2SQ=; h=Date:To:From:Subject:From; b=sNS4yx0YVHBvnodqPdpgmh71eiS3WxrX6yoqgB/FDkzzbq2m0kMG9nWDBZpclls7j FYNFlx0laZQA1zfp2drwV+5xQACAeYd22S6LOAT2mYh5AeCcOJloZMfLgrudRymjNV X+o03TCBDslDFJlb+0sZPw+OKh17gjWZN9VwG8ZM= Date: Mon, 03 Nov 2025 17:40:13 -0800 To: mm-commits@vger.kernel.org,rppt@kernel.org,lkp@intel.com,graf@amazon.com,changyuanl@google.com,bhe@redhat.com,maqianga@uniontech.com,akpm@linux-foundation.org From: Andrew Morton Subject: + kexec-print-out-debugging-message-if-required-for-kexec_load.patch added to mm-nonmm-unstable branch Message-Id: <20251104014013.8846BC4CEE7@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: kexec: print out debugging message if required for kexec_load has been added to the -mm mm-nonmm-unstable branch. Its filename is kexec-print-out-debugging-message-if-required-for-kexec_load.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/kexec-print-out-debugging-message-if-required-for-kexec_load.patch This patch will later appear in the mm-nonmm-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: Qiang Ma Subject: kexec: print out debugging message if required for kexec_load Date: Mon, 3 Nov 2025 14:34:39 +0800 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(). Especially in the RISC-V architecture, kexec_image_info() has been removed(commit eb7622d908a0 ("kexec_file, riscv: print out debugging message if required")). As a result, when using '-d' for the kexec_load interface, print nothing in the kernel space. This might be helpful for verifying the accuracy of the data passed to the kernel. Therefore, refer to this commit a85ee18c7900 ("kexec_file: print out debugging message if required"), debug print information has been added. Link: https://lkml.kernel.org/r/20251103063440.1681657-4-maqianga@uniontech.com Signed-off-by: Qiang Ma Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202510310332.6XrLe70K-lkp@intel.com/ Cc: Alexander Graf Cc: Baoquan He Cc: Changyuan Lyu Cc: Mike Rapoport Signed-off-by: Andrew Morton --- kernel/kexec.c | 11 +++++++++++ 1 file changed, 11 insertions(+) --- a/kernel/kexec.c~kexec-print-out-debugging-message-if-required-for-kexec_load +++ a/kernel/kexec.c @@ -154,7 +154,15 @@ static int do_kexec_load(unsigned long e if (ret) goto out; + kexec_dprintk("nr_segments = %lu\n", nr_segments); for (i = 0; i < nr_segments; i++) { + struct kexec_segment *ksegment; + + ksegment = &image->segment[i]; + kexec_dprintk("segment[%lu]: buf=0x%p bufsz=0x%zx mem=0x%lx memsz=0x%zx\n", + i, ksegment->buf, ksegment->bufsz, ksegment->mem, + ksegment->memsz); + ret = kimage_load_segment(image, i); if (ret) goto out; @@ -166,6 +174,9 @@ static int do_kexec_load(unsigned long e if (ret) goto out; + kexec_dprintk("kexec_load: type:%u, start:0x%lx head:0x%lx flags:0x%lx\n", + image->type, image->start, image->head, flags); + /* Install the new kernel and uninstall the old */ image = xchg(dest_image, image); _ Patches currently in -mm which might be from maqianga@uniontech.com are kexec-fix-uninitialized-struct-kimage-image-pointer.patch kexec-add-kexec_core-flag-to-control-debug-printing.patch kexec-print-out-debugging-message-if-required-for-kexec_load.patch kexec_file-fix-the-issue-of-mismatch-between-loop-variable-types.patch