Messages in this thread | | | Date | Tue, 12 Apr 2016 14:54:08 +0530 | Subject | Re: [fuse-devel] Horrible mmap write performance (kernel writeback issue?) | From | Ashish Sangwan <> |
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On Tue, Apr 12, 2016 at 5:54 AM, Tejun Heo <tj@kernel.org> wrote: > Hello, > > On Mon, Apr 11, 2016 at 10:04:42AM +0200, Jakob Unterwurzacher wrote: >> What seems to be happening in the kernel is that the estimated device bandwith >> drops to zero. I'm not even sure how this works for FUSE, but that's what I >> gathered from some printk debugging. > > Yeah, writeback bw getting messed up is the most likely cause. Prolly > some silly bug. I can reproduce the problem. Looking into it.
Probably you want to look into: https://lkml.org/lkml/2016/3/10/21
The patch mentioned above solves the issue for me.
Thanks, Ashish > > Thanks. > > -- > tejun
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