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| author | Gerald Schaefer <gerald.schaefer@de.ibm.com> | 2020-06-23 20:10:08 +0300 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2020-10-02 15:40:48 +0300 |
| commit | 5627b9224b00334e4c91122ebbb8536a9a575969 (patch) | |
| tree | 3d7b4efde26c611e44589a8379a6917cb302d37d /block | |
| parent | bd37b36832f62bf42ab66da8744191d99252a6e3 (diff) | |
| download | linux-5627b9224b00334e4c91122ebbb8536a9a575969.tar.xz | |
s390/ipl: add support to control memory clearing for nvme re-IPL
Re-IPL for nvme is currently done by using diag 308 with the "Load Clear"
subcode, which means that all memory will be cleared.
This can increase re-IPL duration considerably on very large machines.
For list-directed IPL like nvme or fcp IPL, a "Load Normal" subcode was
introduced with z14. The "Load Normal" diag 308 subcode allows to re-IPL
without clearing memory.
This patch adds a new "clear" sysfs attribute to /sys/firmware/reipl/nvme,
which can be set to either "0" or "1" to disable or enable re-IPL with
memory clearing. The default value is "0", which disables memory clearing.
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Reviewed-by: Vasily Gorbik <gor@linux.ibm.com>
Tested-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'block')
0 files changed, 0 insertions, 0 deletions