NVMe Kernel Bug Trigger

[Virt]

I have run into a bug multiple times now in nvme-core.c.
Running pve-kernel-4.2.2.1-pve
The line noted in nvme-core.c is 721 which is as follows:

BUG_ON(dma_len < 0);

The hardware is a Samsung SM951 128GB.

 

[tom]

pve-kernel-4.2.2.1-pve

this is an 'old' kernel, update to latest and try again.

 

[Virt]

So far I haven't hit it but I am still quite leery since the NVMe driver version is the same as the previous kernel.

 

[Virt]

The issue still exists in the newest version of Proxmox. I just had it lockup again 5 minutes ago.

 

[spirit]

and old bug report about this here:
http://lists.infradead.org/pipermail/linux-nvme/2014-January/000659.html

BTW, which filesystem do you use ?

 

[Virt]

The NVMe device is acting as the cache (bcache) for a two-drive mdraid 10 using ext4.

EDIT: Bcache is configured for writeback, I need the write speed that it gives.