lsmem: add hint about block merges to the man page

Signed-off-by: Karel Zak <kzak@redhat.com>

sys-utils/chmem.8

@@ -17,7 +17,8 @@ in GiB (1024 x 1024 x 1024 bytes). The default unit is MiB.
 .IP "\(hy" 2
 Specify \fIRANGE\fP in the form 0x<start>-0x<end> as shown in the output of the
 \fBlsmem\fP command. <start> is the hexadecimal address of the first byte and <end>
-is the hexadecimal address of the last byte in the memory range.
+is the hexadecimal address of the last byte in the memory range. Note that the range
+as shown by \fBlsmem\fP command maybe be influenced by zones (\fBlsmem -o +ZONES\fP).
 .
 .IP "\(hy" 2
 Specify \fIBLOCKRANGE\fP in the form <first>-<last> or <block> as shown in the

sys-utils/lsmem.1

@@ -18,6 +18,11 @@ together with a columns list in environments where a stable output is required.
 Not all columns are supported on all systems.  If an unsupported column is
 specified, \fBlsmem\fP prints the column but does not provide any data for it.
 
+The number of output entries (memory ranges) maybe be influenced by specified
+columns. The lsmem command shows larger memory ranges if the blocks in the
+range do not distinguish in output columns. For example RANGE maybe be
+different if the command output contains column ZONES (lsmem -o +ZONES).
+
 Use the \fB\-\-help\fR option to see the columns description.
 
 .SH OPTIONS