tree a1449e94cfaa5490aebd7f2980229a7b67a26023
parent 29b08d2bae854f66d3cfd5f57aaf2e7c2c7fce32
author Heiko Carstens <heiko.carstens@de.ibm.com> 1165243242 +0100
committer Martin Schwidefsky <schwidefsky@de.ibm.com> 1165243242 +0100

[S390] Use diag260 for memory size detection.

Avoid the tprot loop if diag260 works and reports that there are no
holes in memory. The tprot instruction can lead to a significant delay
in the ipl process if the virtual guest has a lot of memory and the
host is under memory pressure.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>