Re: [PATCH v6 7/8] dynamic_debug: add asm-generic implementation for DYNAMIC_DEBUG_RELATIVE_POINTERS

From: Nick Desaulniers
Date: Tue Jun 25 2019 - 18:18:48 EST


On Mon, Jun 24, 2019 at 11:35 PM Rasmus Villemoes
<linux@xxxxxxxxxxxxxxxxxx> wrote:
>
> On 24/06/2019 23.53, Nick Desaulniers wrote:
> > On Thu, Jun 20, 2019 at 1:46 PM Rasmus Villemoes
> > <linux@xxxxxxxxxxxxxxxxxx> wrote:
> >> Well, apart from booting, I've mostly just tested that the debugfs
> >> control file is identical before and after enabling relative pointers,
> >
> > mainline x86_64 defconfig+CONFIG_DYNAMIC_DEBUG
> > $ cat /dfs/dynamic_debug/control | wc -l
> > 2488
> >
> >
> > mainline x86_64 defconfig+CONFIG_DYNAMIC_DEBUG+this patch series
> > $ cat /dfs/dynamic_debug/control | wc -l
> > 2486
> >
> > (seems like maybe 2 are missing? Let me try to collect a diff. Maybe
> > 2 were removed in this series?)
>
> Hm, no pr_debugs should have been added or removed. Perhaps you have a
> slightly different set of modules loaded? Otherwise there's something
> odd going on, and a diff would be really nice. It's possible that the
> order of the lines are different, so you may have to sort them to get a
> meaningful diff. (A diff is nice extra sanity check even if the line
> count matches, of course).

You can fetch my logs from the latest commit to this dummy branch:
https://github.com/ClangBuiltLinux/linux/commit/90096d926aaf94eb84584a4418fde7c8d42dddea

Looking at `meld wo_patches.txt w_patches.txt`, it looks like:
1. line numbers in some translation units are adjusted. maybe this is
intentional?
2. pci_pm_suspend_noirq seems to exist twice(?) before your patches, once after
3. xhci_urb_enqueue seems to exist three times before your patches, twice after

--
Thanks,
~Nick Desaulniers