On Tue, 2017-07-25 at 16:22 -0600, Ross Zwisler wrote:
On Tue, Jul 25, 2017 at 09:37:38PM +0000, Kani, Toshimitsu wrote:
> Copying files to vfat FS on an NVDIMM device hits
> BUG_ON(!PageLocked(page)) in try_to_free_buffers(). It happens on
> 4.13-rc1, and happens on older kernels as well.
> A simple reproducer is shown below. It is 100% reproducible on my
> setup (8GB of regular memory and 16GB of NVDIMM). It usually hits
> in the 3rd or 4th file copy and does not repeat with the while-
> loop. Interestingly, it hits only when an NVDIMM device is set as
> raw or memory mode. It does not hit with sector mode.
Interesting, thanks for the report.. I was able to reproduce this in
my KVM setup with a virtualized NVDIMM using v4.12. I also tried
reproducing it with BRD, and wasn't able.
I'll take a look.
Great!! Thanks Ross!