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MDEV-38730 innodb_log_file_mmap=ON does not work on AMD64, ARMv8, POWER

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log_mmap(): If the MAP_SYNC|MAP_SHARED_VALIDATE operation (PMEM)
failed and the path is not in /dev/shm (which we treat as PMEM),
proceed to try regular MAP_SHARED read-only mapping. This allows
somewhat more efficient crash recovery, basically with an I/O
buffer that is not limited by innodb_log_buffer_size.

Reviewed by: Thirunarayanan Balathandayuthapani
This commit is contained in:
Marko Mäkelä 2026-02-04 10:15:05 +02:00
commit 4152ee12ea
1 changed files with 2 additions and 3 deletions
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5
storage/innobase/log/log0log.cc
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@ -288,9 +288,8 @@ remap:
if (!stat("/dev/shm", &st))
{
is_pmem= st.st_dev == st_dev;
if (!is_pmem)
return ptr; /* MAP_FAILED */
goto remap;
if (is_pmem)
goto remap;
}
}
}