linux-kernel - Re: INFO: task hung in xlog_grant_head

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Message-ID: <46be4dcc-15e5-1482-042b-a0bcdb0fa56b@sandeen.net>
Date:   Mon, 11 Jun 2018 09:35:08 -0500
From:   Eric Sandeen <sandeen@...deen.net>
To:     Dmitry Vyukov <dvyukov@...gle.com>
Cc:     Eric Biggers <ebiggers3@...il.com>,
        "Darrick J. Wong" <darrick.wong@...cle.com>,
        Dave Chinner <david@...morbit.com>,
        Brian Foster <bfoster@...hat.com>,
        syzbot <syzbot+568245b88fbaedcb1959@...kaller.appspotmail.com>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-xfs <linux-xfs@...r.kernel.org>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>
Subject: Re: INFO: task hung in xlog_grant_head_check

On 6/11/18 8:20 AM, Dmitry Vyukov wrote:
> On Wed, May 23, 2018 at 8:01 PM, Eric Sandeen <sandeen@...deen.net> wrote:

...

>> As an aside, I wonder how much coverage of the V5 format code syzkaller
>> /has/
>> achieved; that would be another useful datapoint google could provide - if
>> syzkaller is in fact traversing the V5 codepaths and isn't turning anything
>> up, that'd be pretty useful to know.
> 
> Hi Eric,
> 
> The current syzbot kernel code coverage is available here:
> https://storage.googleapis.com/syzkaller/cover/upstream.html#9c73bb525fc1def86e67f5039ab97d8f48062621

Here is an example of an informative, useful, and efficient presentation of
code coverage:

http://ltp.sourceforge.net/coverage/lcov/output/index.html

Thanks,
-Eric