linux-kernel - Re: [PATCH v2 2/7] kexec_file: print out debugging message if required

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Message-ID: <ZWBhgfhFONEYcJZf@MiWiFi-R3L-srv>
Date:   Fri, 24 Nov 2023 16:40:33 +0800
From:   Baoquan He <bhe@...hat.com>
To:     Joe Perches <joe@...ches.com>
Cc:     linux-kernel@...r.kernel.org, kexec@...ts.infradead.org,
        x86@...nel.org, linux-arm-kernel@...ts.infradead.org,
        linux-riscv@...ts.infradead.org, linuxppc-dev@...ts.ozlabs.org,
        linux-parisc@...r.kernel.org, akpm@...ux-foundation.org,
        nathan@...nel.org, yujie.liu@...el.com
Subject: Re: [PATCH v2 2/7] kexec_file: print out debugging message if
 required

On 11/23/23 at 11:16pm, Joe Perches wrote:
> On Fri, 2023-11-24 at 11:36 +0800, Baoquan He wrote:
> > Replace pr_debug() with the newly added kexec_dprintk() in kexec_file
> > loading related codes.
> 
> trivia for pr_debug -> kexec_dprintk conversions for
> the entire patch set:

OK, will check all patchset and adjust the indendation, thanks.

> 
> > diff --git a/kernel/crash_core.c b/kernel/crash_core.c
> []
> > @@ -551,9 +551,12 @@ int crash_prepare_elf64_headers(struct crash_mem *mem, int need_kernel_map,
> >  		phdr->p_filesz = phdr->p_memsz = mend - mstart + 1;
> >  		phdr->p_align = 0;
> >  		ehdr->e_phnum++;
> > -		pr_debug("Crash PT_LOAD ELF header. phdr=%p vaddr=0x%llx, paddr=0x%llx, sz=0x%llx e_phnum=%d p_offset=0x%llx\n",
> > +#ifdef CONFIG_KEXEC_FILE
> > +		kexec_dprintk("Crash PT_LOAD ELF header. phdr=%p vaddr=0x%llx, paddr=0x%llx, "
> > +			"sz=0x%llx e_phnum=%d p_offset=0x%llx\n",
> >  			phdr, phdr->p_vaddr, phdr->p_paddr, phdr->p_filesz,
> >  			ehdr->e_phnum, phdr->p_offset);
> 
> It's good form to rewrap continuation lines to the open parenthesis
> 
> > diff --git a/kernel/kexec_file.c b/kernel/kexec_file.c
> []
> > @@ -389,11 +391,12 @@ SYSCALL_DEFINE5(kexec_file_load, int, kernel_fd, int, initrd_fd,
> >  	if (ret)
> >  		goto out;
> >  
> > +	kexec_dprintk("nr_segments = %lu\n", image->nr_segments);
> >  	for (i = 0; i < image->nr_segments; i++) {
> >  		struct kexec_segment *ksegment;
> >  
> >  		ksegment = &image->segment[i];
> > -		pr_debug("Loading segment %d: buf=0x%p bufsz=0x%zx mem=0x%lx memsz=0x%zx\n",
> > +		kexec_dprintk("segment[%d]: buf=0x%p bufsz=0x%zx mem=0x%lx memsz=0x%zx\n",
> >  			 i, ksegment->buf, ksegment->bufsz, ksegment->mem,
> >  			 ksegment->memsz);
> 
> here too etc...
>