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mdbx: fix nasty typo/rebase/merge bug with calling msync() on Linux.

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Леонид Юрьев (Leonid Yuriev) 2022-11-18 20:04:09 +03:00
parent 4a257133cb
commit c46c03e7c8
1 changed files with 8 additions and 3 deletions
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11
src/osal.c
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@ -1706,10 +1706,15 @@ MDBX_INTERNAL_FUNC int osal_msync(const osal_mmap_t *map, size_t offset,
return (int)GetLastError(); return (int)GetLastError();
#else #else
#if defined(__linux__) || defined(__gnu_linux__) #if defined(__linux__) || defined(__gnu_linux__)
assert(linux_kernel_version > 0x02061300);
/* Since Linux 2.6.19, MS_ASYNC is in fact a no-op. The kernel properly /* 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. */ * tracks dirty pages and flushes ones as necessary. */
return MDBX_SUCCESS; //
// However, this behavior may be changed in custom kernels,
// so just leave such optimization to the libc discretion.
//
// assert(linux_kernel_version > 0x02061300);
// if (mode_bits == MDBX_SYNC_NONE)
// return MDBX_SUCCESS;
#endif /* Linux */ #endif /* Linux */
if (msync(ptr, length, (mode_bits & MDBX_SYNC_DATA) ? MS_SYNC : MS_ASYNC)) if (msync(ptr, length, (mode_bits & MDBX_SYNC_DATA) ? MS_SYNC : MS_ASYNC))
return errno; return errno;