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author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2005-06-21 17:16:30 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-06-21 19:07:34 -0700 |
commit | e9b9a04796eade5241452a913ec6f3433437b4f5 (patch) | |
tree | 9cd181fb9e905245dc07913c3a3e421d17ca6ac9 /mm/madvise.c | |
parent | 447570cfde680d5bf09c47b9c8d1dcf5bcb18f10 (diff) |
[PATCH] s390: memory detection > 32GB
The kernel takes a very long time to boot if the memory size is bigger then
32767 MB. The memory size is contained in a structure created by an sclp
call. The kernel accesses the field with a LH instrution which performs a
sign extension of a 16 bit word. In the case of a memory size with bit 2^15
set this results in a very large value and the memory detection just loops for
a long time. In addition if more then 64 GB are used on a 64 bit system the
memory size is read from an incorrect storage location.
Use zero-extention to read the 16 bit memory size and the correct offset to
read the 4 byte memory size on 64 bit.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm/madvise.c')
0 files changed, 0 insertions, 0 deletions