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From: Ross Zwisler <ross.zwisler@linux.intel.com>
To: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Christoph Hellwig <hch@infradead.org>, xfs@oss.sgi.com
Subject: Re: real-time device BUG
Date: Fri, 29 Jan 2016 16:40:36 -0700	[thread overview]
Message-ID: <20160129234036.GA24929@linux.intel.com> (raw)
In-Reply-To: <20160129230531.GA29895@linux.intel.com>

On Fri, Jan 29, 2016 at 04:05:31PM -0700, Ross Zwisler wrote:
> Today I was trying to get real-time devices working with XFS, and both a
> manual pwrite() to a real-time device and xfs_rtcp end up with a lockdep spat
> followed by a kernel BUG.  This behavior is consistent between kernel versions
> v4.4 and v4.5-rc1.  I initially found this using some pmem block devices, but
> it also happens with BRD.

This also happens with an mmap on the real-time file followed by a write.
Essentially I think that any path that tries to allocate a block for the real
time file his this same BUG.

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  reply	other threads:[~2016-01-29 23:40 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-01-29 23:05 real-time device BUG Ross Zwisler
2016-01-29 23:40 ` Ross Zwisler [this message]
2016-01-30  3:11   ` Eric Sandeen

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