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s390/mem_detect: replace tprot loop with binary search

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In a situation when other memory detection methods are not available
(no SCLP and no z/VM diag260), continuous online memory is assumed.
Replacing tprot loop with faster binary search, as only online memory
end has to be found.

Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Vasily Gorbik
2018-04-11 19:15:24 +02:00
committed by Martin Schwidefsky
parent cd45c99561
commit 54c57795e8
4 changed files with 18 additions and 34 deletions
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2
arch/s390/include/asm/mem_detect.h
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@@ -9,7 +9,7 @@ enum mem_info_source {
MEM_DETECT_SCLP_STOR_INFO,
MEM_DETECT_DIAG260,
MEM_DETECT_SCLP_READ_INFO,
MEM_DETECT_TPROT_LOOP
MEM_DETECT_BIN_SEARCH
};
struct mem_detect_block {