Re: [PATCH V2] Btrfs: keep dropped roots in cache until transaction commit

["Holger Hoffstätte" <holger.hoffstaette@googlemail.com>]

Hi Glyn :)

On 09/16/15 16:31, Glyn Normington wrote:
> We are seeing a very similar problem fwiw. Unfortunately we can't
> reproduce this reliably, but it is cropping up regularly. Here's a
> chore we are using to track our work on this: [2].
> 
> Here's the kernel log:
> 
> [610194.395845] WARNING: CPU: 3 PID: 29166 at
> /build/linux-lts-vivid-BZwsXG/linux-lts-vivid-3.19.0/fs/btrfs/super.c:260
> __btrfs_abort_transaction+0x54/0x130 [btrfs]()

This is an entirely different problem and may have long been fixed;
I count at least 6 patches for tx aborts in my 4.1++ tree alone.
We're talking about patches that I can guarantee you are not running.

If Pivotal needs some help with stable btrfs backport fixes I might be
able to resurrect my old 3.19 patch queue (check my Github!), but this
is close to Zombie Olympics.. :)

cheers
Holger