Memory allocation issue while reading many large files

[enp]

Hi,

Reading https://github.com/yandex-cloud/geesefs?tab=readme-ov-file#memory-limit about ENOMEM error for cases where read-ahead-large * processes count > memory-limit

Looks as not good limitation for production cases where we can't limit processes count

Maybe it is possible to check if read-ahead-large can be really allocated and skip allocation to allow at least slow reading without read ahead?