Re: [PATCH 1/1] mm: vmscan: Reduce throttling due to a failure to make progress

[Mel Gorman]

On Thu, Dec 02, 2021 at 08:42:29PM +0900, Alexey Avramov wrote:
> I tested this [1] patch on top of 5.16-rc2, the same tests.
> 

Thanks for all the tests you've done for this, it's much appreciated.

> - with noswap:
> 
> 2021-12-02 19:41:19,279: Stall times for the last 146.5s:
> 2021-12-02 19:41:19,279: -----------
> 2021-12-02 19:41:19,279: some cpu     1.1s, avg 0.8%
> 2021-12-02 19:41:19,279: -----------
> 2021-12-02 19:41:19,279: some io      116.2s, avg 79.3%
> 2021-12-02 19:41:19,280: full io      109.6s, avg 74.8%
> 2021-12-02 19:41:19,280: -----------
> 2021-12-02 19:41:19,280: some memory  3.9s, avg 2.6%
> 2021-12-02 19:41:19,280: full memory  3.8s, avg 2.6%
> 
> Excellent!
> 
> psi log:
> https://raw.githubusercontent.com/hakavlad/cache-tests/main/516-reclaim-throttle/516-rc2/patch6/noswap/psi
> 
> mem log:
> https://raw.githubusercontent.com/hakavlad/cache-tests/main/516-reclaim-throttle/516-rc2/patch6/noswap/mem
> 
> - with swappiness=0
> 
> 2021-12-02 19:46:04,860: Stall times for the last 144.5s:
> 2021-12-02 19:46:04,860: -----------
> 2021-12-02 19:46:04,860: some cpu     1.1s, avg 0.8%
> 2021-12-02 19:46:04,860: -----------
> 2021-12-02 19:46:04,860: some io      106.9s, avg 74.0%
> 2021-12-02 19:46:04,861: full io      101.3s, avg 70.1%
> 2021-12-02 19:46:04,861: -----------
> 2021-12-02 19:46:04,861: some memory  99.6s, avg 68.9%
> 2021-12-02 19:46:04,861: full memory  95.6s, avg 66.2%
> 
> PSI mem pressure was high, but there were no long stalls.
> 

Great, so can I assume you're ok with this version? If yes, can I add
the following?

Tested-by: Alexey Avramov <hakavlad@xxxxxxxx>

-- 
Mel Gorman
SUSE Labs