Re: [PATCH V4] mm: compaction: use the proper flag to determine watermarks

[Andrew Morton]

On Sat, 25 Jan 2025 14:53:57 +0800 yangge1116@xxxxxxx wrote:

> From: yangge <yangge1116@xxxxxxx>
> 
> There are 4 NUMA nodes on my machine, and each NUMA node has 32GB
> of memory. I have configured 16GB of CMA memory on each NUMA node,
> and starting a 32GB virtual machine with device passthrough is
> extremely slow, taking almost an hour.
>
> ...
>
> After this fix, it only takes a few tens of seconds to start a 32GB
> virtual machine with device passthrough functionality.

An hour is unacceptable - I'll add cc:stable to this.

If this is a regression then a Link: tag would be nice.  Or perhaps the
kernel had always done this.