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Re: fs: GPF in locked_inode_to_wb_and_lock_list

From Tejun Heo <tj@kernel.org>
Newsgroups linux.kernel
Subject Re: fs: GPF in locked_inode_to_wb_and_lock_list
Date 2016-04-21 18:20 +0200
Message-ID <rqpuH-3tV-11@gated-at.bofh.it> (permalink)
References <rpdYC-3eO-15@gated-at.bofh.it> <rq7Ht-69I-5@gated-at.bofh.it> <rqi9R-69w-21@gated-at.bofh.it>
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Hello,

On Thu, Apr 21, 2016 at 10:25:12AM +0200, Dmitry Vyukov wrote:
> I use this script for symbolization:
> https://github.com/google/sanitizers/blob/master/address-sanitizer/tools/kasan_symbolize.py
> It invokes addr2line to provide file:line info, adds inline frames,
> strips ? frames (are they ever useful?) and strips timestamps.

Heh, sometimes they are.  They obviously are useful when backlinks are
broken for some reason.  Through the remnants of the old call stacks,
they also can sometimes tell the history of the task - where it was
before it got to the current backtrace.  It isn't reliable at all but
I can recall several occasions where they were useful in root causing
issues.  It *might* make a sense to have an option to not strip them.

And, yeah, I'm all for it being in the kernel tree.

Thanks.

-- 
tejun

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Thread

fs: GPF in locked_inode_to_wb_and_lock_list Dmitry Vyukov <dvyukov@google.com> - 2016-04-18 11:50 +0200
  Re: fs: GPF in locked_inode_to_wb_and_lock_list Tejun Heo <tj@kernel.org> - 2016-04-20 23:20 +0200
    Re: fs: GPF in locked_inode_to_wb_and_lock_list Dmitry Vyukov <dvyukov@google.com> - 2016-04-21 10:30 +0200
      Re: fs: GPF in locked_inode_to_wb_and_lock_list Andrey Ryabinin <ryabinin.a.a@gmail.com> - 2016-04-21 11:20 +0200
        Re: fs: GPF in locked_inode_to_wb_and_lock_list Dmitry Vyukov <dvyukov@google.com> - 2016-04-21 11:30 +0200
      Re: fs: GPF in locked_inode_to_wb_and_lock_list Tejun Heo <tj@kernel.org> - 2016-04-21 18:20 +0200
    Re: fs: GPF in locked_inode_to_wb_and_lock_list Dmitry Vyukov <dvyukov@google.com> - 2016-04-21 10:40 +0200
      Re: fs: GPF in locked_inode_to_wb_and_lock_list Andrey Ryabinin <ryabinin.a.a@gmail.com> - 2016-04-21 11:50 +0200
        Re: fs: GPF in locked_inode_to_wb_and_lock_list Dmitry Vyukov <dvyukov@google.com> - 2016-04-21 12:10 +0200
          Re: fs: GPF in locked_inode_to_wb_and_lock_list Tejun Heo <tj@kernel.org> - 2016-04-21 19:10 +0200
            Re: fs: GPF in locked_inode_to_wb_and_lock_list Dmitry Vyukov <dvyukov@google.com> - 2016-04-22 21:00 +0200

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