[lkml]   [2017]   [Oct]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH 4.9 086/104] arm64: kasan: avoid bad virt_to_pfn()
(Cc'ed Julia)

On Mon, Oct 09, 2017 at 09:33:01AM -0700, Laura Abbott wrote:
>On 10/06/2017 08:10 PM, Levin, Alexander (Sasha Levin) wrote:
>> We are experimenting with using neural network to aid with patch
>> selection for stable kernel trees. There are quite a few commits that
>> were not marked for stable, but are stable material, and we're trying
>> to get them into their appropriate kernel trees.
>Apart from the practical which has been covered, I'd be interested
>in hearing about the details of how this works if you can share

This work is based on Julia's work
( to identify
commits that fix bugs.

Essentially, my approach to this is to extract as much information as
possbile form the commit, including things such as:

- How many times a certain word appeared in the message
- Who is the author
- Code metrics
- etc

In my case, I end up with about 30,000 of these "inputs", and train a
neural network based on whether a given commit was included in a
stable tree or not.

This approach has a few drawbacks compared to the one Julia
described in her paper:

- Not every bug fixing commit ends up in stable (some end up in -rc
fixing a bug from the current merge window).
- Same as above, but for commits we miss and fail to add to stable.
- Sometimes commits get added to stable even though they don't follow
the rules at all (security fixes are a simple example).

But it does seem to be effective at finding bug fixing commits that
should be in stable.

At this stage we are still trying to figure out what a "bug fixing"
commit really is. For example, an observation we recently made was
that the code metrics actually don't have much weight in determining
whether a commit should be in stable or not.

As we just started, I'm still experimenting with a few approaches, and
I belive Julia is waiting for a new student to take over this, so we
don't have any big insights to share just yet :)


 \ /
  Last update: 2017-10-10 19:24    [W:0.135 / U:3.464 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site