[PATCH v3] erofs: rename per CPU buffer to global buffer pool and make it configurable

[Gao Xiang]

On 2024/3/22 21:45, Chunhai Guo wrote:
> It will cost more time if compressed buffers are allocated on demand for
> low-latency algorithms (like lz4) so EROFS uses per-CPU buffers to keep
> compressed data if in-place decompression is unfulfilled.  While it is kind
> of wasteful of memory for a device with hundreds of CPUs, and only a small
> number of CPUs concurrently decompress most of the time.
> 
> This patch renames it as 'global buffer pool' and makes it configurable.
> This allows two or more CPUs to share a common buffer to reduce memory
> occupation.
> 
> Signed-off-by: Chunhai Guo <guochunhai at vivo.com>
> Suggested-by: Gao Xiang <xiang at kernel.org>
> ---

Side note: it'd be better to have a changelog here against the previous
version next time.

Reviewed-by: Gao Xiang <hsiangkao at linux.alibaba.com>

Thanks,
Gao Xiang