Re: [Bug 196157] New: 100+ times slower disk writes on 4.x+/i386/16+RAM, compared to 3.x

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On Fri 17-08-18 09:01:41, Thierry wrote:
> Bug still present for 32 bits kernel in v4.18.1, and now, v4.1 (last
> working Linux kernel for 32 bits machines with 16Gb or more RAM) has
> gone unmaintained...

Have you tried to set highmem_is_dirtyable as suggested elsewhere?

I would like to stress out that 16GB with 32b kernels doesn't play
really nice. Even small changes (larger kernel memory footprint) can
lead to all sorts of problems. I would really recommend using 64b
kernels instead. There shouldn't be any real reason to stick with 32b
highmem based kernel for such a large beast. I strongly doubt the cpu
itself would be 32b only.

-- 
Michal Hocko
SUSE Labs




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