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Add compiler flag to disable explicit msync() calls

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This commit is contained in:
Patrick J Cherry
2018-01-31 20:45:48 +00:00
parent f2fa00260b
commit 7f98f6ef9e
2 changed files with 8 additions and 2 deletions
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5
Makefile
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@@ -12,6 +12,11 @@ else
CFLAGS_EXTRA=-O2 CFLAGS_EXTRA=-O2
endif endif
NO_MSYNC=1
ifdef NO_MSYNC
CFLAGS_EXTRA += -DNO_MSYNC
endif
CFLAGS_EXTRA += -fPIC --std=gnu99 CFLAGS_EXTRA += -fPIC --std=gnu99
LDFLAGS_EXTRA += -Wl,--relax,--gc-sections -L$(LIB) -Wl,-rpath-link,$(LIB) LDFLAGS_EXTRA += -Wl,--relax,--gc-sections -L$(LIB) -Wl,-rpath-link,$(LIB)

3
src/server/client.c
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@@ -472,7 +472,7 @@ void client_reply_to_write( struct client* client, struct nbd_request request )
bitset_set_range(client->serve->allocation_map, request.from, request.len); bitset_set_range(client->serve->allocation_map, request.from, request.len);
} }
if (1) /* not sure whether this is necessary... */ #ifndef NO_MSYNC
{ {
/* multiple of 4K page size */ /* multiple of 4K page size */
uint64_t from_rounded = request.from & (!0xfff); uint64_t from_rounded = request.from & (!0xfff);
@@ -485,6 +485,7 @@ void client_reply_to_write( struct client* client, struct nbd_request request )
"msync failed %ld %ld", request.from, request.len "msync failed %ld %ld", request.from, request.len
); );
} }
#endif
client_write_reply( client, &request, 0); client_write_reply( client, &request, 0);
} }