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Re: [PATCH] block: bios with an offset are always gappy

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On Thu, Apr 13, 2017 at 11:48:35AM +0200, Christoph Hellwig wrote:
> On Thu, Apr 13, 2017 at 10:06:29AM +0200, Johannes Thumshirn wrote:
> > Doing a mkfs.btrfs on a (qemu emulated) PCIe NVMe causes a kernel panic
> > in nvme_setup_prps() because the dma_len will drop below zero but the
> > length not.
> 
> I think we should also turns this into a WARN_ON_ONCE + error return..
> 
> But do you have an exact btrfsprogs version and command line?  I do a lot
> of testing that involves mkfs.btrfs on nvme and haven't seen it..

Ah one detail I forgot: mkfs.xfs _does_ work. Haven't checked ext4 though.

-- 
Johannes Thumshirn                                          Storage
jthumshirn@suse.de                                +49 911 74053 689
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[PATCH] block: bios with an offset are always gappy Johannes Thumshirn <jthumshirn@suse.de> - 2017-04-13 10:10 +0200
  Re: [PATCH] block: bios with an offset are always gappy Christoph Hellwig <hch@lst.de> - 2017-04-13 11:50 +0200
    Re: [PATCH] block: bios with an offset are always gappy Johannes Thumshirn <jthumshirn@suse.de> - 2017-04-13 12:00 +0200
    Re: [PATCH] block: bios with an offset are always gappy Johannes Thumshirn <jthumshirn@suse.de> - 2017-04-13 12:10 +0200
  Re: [PATCH] block: bios with an offset are always gappy Ming Lei <ming.lei@redhat.com> - 2017-04-13 12:10 +0200
    Re: [PATCH] block: bios with an offset are always gappy Johannes Thumshirn <jthumshirn@suse.de> - 2017-04-13 12:20 +0200
    Re: [PATCH] block: bios with an offset are always gappy Johannes Thumshirn <jthumshirn@suse.de> - 2017-04-13 14:00 +0200
      Re: [PATCH] block: bios with an offset are always gappy Ming Lei <ming.lei@redhat.com> - 2017-04-13 14:20 +0200
        Re: [PATCH] block: bios with an offset are always gappy Ming Lei <ming.lei@redhat.com> - 2017-04-13 15:50 +0200
      Re: [PATCH] block: bios with an offset are always gappy Ming Lei <ming.lei@redhat.com> - 2017-04-13 16:50 +0200
        Re: [PATCH] block: bios with an offset are always gappy Johannes Thumshirn <jthumshirn@suse.de> - 2017-04-13 17:00 +0200
        Re: [PATCH] block: bios with an offset are always gappy Andreas Mohr <andi@lisas.de> - 2017-04-13 22:40 +0200
          Re: [PATCH] block: bios with an offset are always gappy Ming Lei <ming.lei@redhat.com> - 2017-04-14 03:20 +0200

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