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Marko Mäkelä 42e6058629 MDEV-35785 innodb_log_file_mmap is not defined on 32-bit systems

innodb_log_file_mmap: Use a constant documentation string that
refers to persistent memory also when it is not available in the build.

HAVE_INNODB_MMAP: Remove, and unconditionally enable this code.

log_mmap(): On 32-bit systems, ensure that the size fits in 32 bits.

log_t::resize_start(), log_t::resize_abort(): Only handle memory-mapping
if HAVE_PMEM is defined. The generic memory-mapped interface is only for
reading the log in recovery. Writable memory mappings are only for
persistent memory, that is, Linux file systems with mount -o dax.

Reviewed by: Debarun Banerjee, Otto Kekäläinen

2025-01-13 07:27:17 +02:00

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 [pread]
 --innodb-log-file-mmap=OFF
 [mmap]
 --innodb-log-file-mmap=ON