On Thu, Aug 15, 2019 at 1:51 AM Artem Tim <ego.corda...@gmail.com> wrote:
> BFQ scheduler help a lot with this issue. Using it on Fedora since 4.19 
> kernel. Also there was previous discussion about make it default for 
> Workstation
> https://lists.fedoraproject.org/archives/list/ker...@lists.fedoraproject.org/message/I2OZWDD4QCDYUXJ5NHYTMGNAB4KLJN2K/

It's mentioned in the workstation issue as having no effect in this case.

I just switched to it and repeating the test case and the GUI still
hangs, is unresponsive, even without substantial pressure on the SSD,
and swap isn't even 1/2 used.

But I am getting something new in kernel messages:

542    sysrq+t during a GUI freeze that lasted over 1 minute, and then:

[  718.068633] fmac.local kernel: SLUB: Unable to allocate memory on
node -1, gfp=0x900(GFP_NOWAIT|__GFP_ZERO)
[  718.068636] fmac.local kernel:   cache: page->ptl, object size: 72,
buffer size: 72, default order: 0, min order: 0
[  718.068639] fmac.local kernel:   node 0: slabs: 296, objs: 16576, free: 0
[  718.068704] fmac.local kernel: chronyd: page allocation failure:
order:0, mode:0x800(GFP_NOWAIT),

Not sure what to make of that. Complete 'journalctl -k' is here:

Chris Murphy
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