Description:
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# actual behaviour
OPcache shows all cached files from all PHP-FPM pools using the same PHP version. In addition it shows a negative used_memory value, since it counts somehow all pools and not only the pool in which the script is executed.

# expected behaviour
OPcache in PHP-FPM should show only the scripts cached within the same pool.

# stept to reproduce
Use Apache with mpm_event module and PHP-FPM installation. Create per domain a separate PHP-FPM pool and execute the pools with different users.

Relevant pool settings:
# /etc/php/7.4/fpm/pool.d/domain-1.conf
php_admin_flag[opcache.enable] = 1
php_admin_value[opcache.memory_consumption] = 128
php_admin_value[opcache.interned_strings_buffer] = 8
php_admin_value[opcache.max_accelerated_files] = 16229
php_admin_flag[opcache.validate_timestamps] = 1
php_admin_flag[opcache.save_comments] = 1
php_admin_value[opcache.revalidate_freq] = 1
php_admin_flag[opcache.fast_shutdown] = 1
php_admin_value[opcache.restrict_api] = "/var/www/html/domain-1.com"
... rest is default

The settings for all domains are the same, except the domain path and config file name.

Execute the test script below on every pool/domain and check the scripts. You should see all scripts from all pools which are cached from the same PHP-FPM version.

Apache: 2.4.51
PHP versions used: 7.4.26, 8.0.13, 8.1.0

Test script:
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https://github.com/rlerdorf/opcache-status/blob/master/opcache.php

Expected result:
----------------
OPcache in PHP-FPM should show only the scripts cached within the same pool.

Actual result:
--------------
OPcache in PHP-FPM shows all scripts that are cached within the same PHP-FPM version.