Re: BTRFS warning: unhandled fiemap cache detected

["Mario Fugazzi®" <fugazzi99@gmail.com>]

Hi Janos, many thanks for your kind answer!
Yes, I also saw a patch regarding this for 4.13, good to know that it is not a
problem ;-)

Thank you again.
Mario


On Wed, 9 Aug 2017 13:13:08 +0200
"Janos Toth F." <toth.f.janos@gmail.com> wrote:

> As much as I can tell it's nothing to worry about. (I have thousands
> of these warnings.) I don't know why the patch was submitted for 4.13
> but not applied to the next 4.12.x , since it looks like a trivial
> tiny fix for an annoying problem.
> 
> On Wed, Aug 9, 2017 at 10:48 AM, Mario Fugazzi® <fugazzi99@gmail.com> wrote:
> > Hi everyone :-)
> >
> > After updating the kernel to the latest one 4.12 I receive a lot of
> > warnings in my dmesg but only on my ssd that is a kingston hyperx predator.
> > No message get logged for my other two traditional HD that are btrfs also.
> > Warnings show only on boot and not on every boot.
> > Kernel is now 4.12.5 but I got that till upgrading to 4.12, in 4.11 no
> > warnings.
> >
> > Just wanted to know if I have to worry about this, scrubs are ok and btrfs
> > check give me no problems.
> >
> > Thank you very much.
> > Mario.
> >
> > Some sample:
> >
> > [   13.486100] BTRFS warning (device sdd2): unhandled fiemap cache
> > detected: offset=0 phys=1960767488 len=8192 flags=0x0 [   13.486110] BTRFS
> > warning (device sdd2): unhandled fiemap cache detected: offset=0
> > phys=1960767488 len=8192 flags=0x0 [   13.486261] BTRFS warning (device
> > sdd2): unhandled fiemap cache detected: offset=0 phys=1960824832 len=12288
> > flags=0x0 [   13.486280] BTRFS warning (device sdd2): unhandled fiemap
> > cache detected: offset=0 phys=1960763392 len=4096 flags=0x0 [   13.486434]
> > BTRFS warning (device sdd2): unhandled fiemap cache detected: offset=0
> > phys=1960767488 len=8192 flags=0x0 [   13.486446] BTRFS warning (device
> > sdd2): unhandled fiemap cache detected: offset=0 phys=1960775680 len=4096
> > flags=0x0 [   13.486616] BTRFS warning (device sdd2): unhandled fiemap
> > cache detected: offset=0 phys=1960783872 len=24576 flags=0x0 [   13.486650]
> > BTRFS warning (device sdd2): unhandled fiemap cache detected: offset=0
> > phys=1960808448 len=4096 flags=0x0 [   13.486719] BTRFS warning (device
> > sdd2): unhandled fiemap cache detected: offset=0 phys=1960812544 len=8192
> > flags=0x0 [   13.486742] BTRFS warning (device sdd2): unhandled fiemap
> > cache detected: offset=0 phys=1960820736 len=4096 flags=0x0
> >
> > --
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