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--- storage/myisam/mi_dynrec.c.orig 2019-10-21 05:21:41 UTC
+++ storage/myisam/mi_dynrec.c
@@ -72,18 +72,13 @@ my_bool mi_dynmap_file(MI_INFO *info, my_off_t size)
DBUG_RETURN(1);
}
/*
- I wonder if it is good to use MAP_NORESERVE. From the Linux man page:
- MAP_NORESERVE
- Do not reserve swap space for this mapping. When swap space is
- reserved, one has the guarantee that it is possible to modify the
- mapping. When swap space is not reserved one might get SIGSEGV
- upon a write if no physical memory is available.
+ MAP_NORESERVE is unimplemented in FreeBSD
*/
info->s->file_map= (uchar*)
my_mmap(0, (size_t) size,
info->s->mode==O_RDONLY ? PROT_READ :
PROT_READ | PROT_WRITE,
- MAP_SHARED | MAP_NORESERVE,
+ MAP_SHARED,
info->dfile, 0L);
if (info->s->file_map == (uchar*) MAP_FAILED)
{