Re: [PATCH v2] x86/kernel: use pr_<level>() and dev_<level>

From: Ingo Molnar
Date: Tue Feb 16 2016 - 03:24:39 EST



* Borislav Petkov <bp@xxxxxxxxx> wrote:

> > @@ -70,10 +70,10 @@ do { \
> > if (!(len)) \
> > break; \
> > \
> > - printk(KERN_DEBUG fmt, ##args); \
> > + pr_debug(fmt, ##args); \
> > for (j = 0; j < (len) - 1; j++) \
> > - printk(KERN_CONT "%02hhx ", buf[j]); \
> > - printk(KERN_CONT "%02hhx\n", buf[j]); \
> > + pr_cont("%02hhx ", buf[j]); \
> > + pr_cont("%02hhx\n", buf[j]); \
> > } \
> > } while (0)
> >
>
> NAK the hell out of that hunk!
>
> Did you actually look at how pr_debug() is defined?
>
> Yeah, I don't think so. With your change, when I boot with
> "debug-alternative" I get:
>
> ...
> [ 0.064005] Last level dTLB entries: 4KB 512, 2MB 255, 4MB 127, 1GB 0
> [ 0.068005] e9 d5 3e d3 00
> [ 0.072004] e9 e8 92 21 ff
> [ 0.075003] eb 11 0f 1f 00
> [ 0.077906] e8 c5 b6 30 00
> [ 0.084009] f3 48 0f b8 c7

Hm, so I suspect the other patch I already applied is buggy as well?

triton:~/tip> git log -1 -p 1b74dde7c47c | grep KERN_DEBUG
- printk(KERN_DEBUG "tseg: %010llx\n", tseg);
- printk(KERN_DEBUG "CPU%d: Thermal monitoring handled by SMI\n", cpu);
-#define Dprintk(x...) do { if (debug_print) printk(KERN_DEBUG x); } while (0)
- printk(KERN_DEBUG "After WB checking\n");
- printk(KERN_DEBUG "MTRR MAP PFN: %016llx - %016llx\n",
- printk(KERN_DEBUG "After UC checking\n");
- printk(KERN_DEBUG "MTRR MAP PFN: %016llx - %016llx\n",
- printk(KERN_DEBUG "After sorting\n");
- printk(KERN_DEBUG "MTRR MAP PFN: %016llx - %016llx\n",
- printk(KERN_DEBUG "reg %d, base: %ld%cB, range: %ld%cB, type %s\n",
- printk(KERN_DEBUG "original variable MTRRs\n");
- printk(KERN_DEBUG "New variable MTRRs\n");
- printk(KERN_DEBUG "New variable MTRRs\n");
- printk(KERN_DEBUG "Failed to setup IBS LVT offset, "
- printk(KERN_DEBUG "No CPU node configured for IBS\n");
- printk(KERN_DEBUG "No EILVT entry available\n");

Thanks,

Ingo