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mdbx: require linux >= 4.0

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This commit is contained in:
Леонид Юрьев (Leonid Yuriev) 2022-09-18 13:21:38 +03:00
parent cf8540d84e
commit fe20de136c
2 changed files with 17 additions and 7 deletions
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11
src/core.c
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@ -11499,6 +11499,17 @@ __cold int mdbx_env_create(MDBX_env **penv) {
return MDBX_INCOMPATIBLE;
}
#if defined(__linux__) || defined(__gnu_linux__)
if (unlikely(linux_kernel_version < 0x04000000)) {
/* 2022-09-01: Прошло уже больше двух после окончания какой-либо поддержки
* самого "долгоиграющего" ядра 3.16.85 ветки 3.x */
ERROR("too old linux kernel %u.%u.%u.%u, the >= 4.0.0 is required",
linux_kernel_version >> 24, (linux_kernel_version >> 16) & 255,
(linux_kernel_version >> 8) & 255, linux_kernel_version & 255);
return MDBX_INCOMPATIBLE;
}
#endif /* Linux */
MDBX_env *env = osal_calloc(1, sizeof(MDBX_env));
if (unlikely(!env))
return MDBX_ENOMEM;

13
src/osal.c
View File

@ -937,9 +937,8 @@ MDBX_INTERNAL_FUNC int osal_fsync(mdbx_filehandle_t fd,
break /* error */;
#if defined(__linux__) || defined(__gnu_linux__)
case MDBX_SYNC_SIZE:
if (linux_kernel_version >= 0x03060000)
return MDBX_SUCCESS;
__fallthrough /* fall through */;
assert(linux_kernel_version >= 0x03060000);
return MDBX_SUCCESS;
#endif /* Linux */
#endif /* _POSIX_SYNCHRONIZED_IO > 0 */
default:
@ -1076,10 +1075,10 @@ MDBX_INTERNAL_FUNC int osal_msync(osal_mmap_t *map, size_t offset,
return (int)GetLastError();
#else
#if defined(__linux__) || defined(__gnu_linux__)
if (mode_bits == MDBX_SYNC_NONE && linux_kernel_version > 0x02061300)
/* Since Linux 2.6.19, MS_ASYNC is in fact a no-op. The kernel properly
* tracks dirty pages and flushes them to storage as necessary. */
return MDBX_SUCCESS;
assert(linux_kernel_version > 0x02061300);
/* Since Linux 2.6.19, MS_ASYNC is in fact a no-op. The kernel properly
* tracks dirty pages and flushes them to storage as necessary. */
return MDBX_SUCCESS;
#endif /* Linux */
if (msync(ptr, length, (mode_bits & MDBX_SYNC_DATA) ? MS_SYNC : MS_ASYNC))
return errno;