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| author | Johannes Berg <johannes.berg@intel.com> | 2019-12-13 10:01:28 +0100 |
|---|---|---|
| committer | Richard Weinberger <richard@nod.at> | 2020-01-19 22:42:06 +0100 |
| commit | d65197ad52494bed3b5e64708281b8295f76c391 (patch) | |
| tree | 6b62b3fc956ae45c2bcc417f3bebe92dcef5a2a3 /arch/um/Kconfig | |
| parent | 87c9366e17259040a9118e06b6dc8de986e5d3d1 (diff) | |
| download | linux-d65197ad52494bed3b5e64708281b8295f76c391.tar.gz linux-d65197ad52494bed3b5e64708281b8295f76c391.tar.bz2 linux-d65197ad52494bed3b5e64708281b8295f76c391.zip | |
um: Fix time-travel=inf-cpu with xor/raid6
Today, I erroneously built a time-travel configuration with btrfs
enabled, and noticed it cannot boot in time-travel=inf-cpu mode,
both xor and raid6 speed measurement gets stuck.
For xor, work around it by picking the first algorithm if inf-cpu
mode is enabled.
For raid6, I didn't find such a workaround, so disallow enabling
time-travel mode if RAID6_PQ_BENCHMARK is enabled.
With this, and RAID6_PQ_BENCHMARK disabled, I can boot a kernel
that has btrfs enabled in time-travel=inf-cpu mode.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Acked-by: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'arch/um/Kconfig')
| -rw-r--r-- | arch/um/Kconfig | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/um/Kconfig b/arch/um/Kconfig index 6f0edd0c0220..0917f8443c28 100644 --- a/arch/um/Kconfig +++ b/arch/um/Kconfig @@ -189,6 +189,8 @@ config SECCOMP config UML_TIME_TRAVEL_SUPPORT bool prompt "Support time-travel mode (e.g. for test execution)" + # inf-cpu mode is incompatible with the benchmarking + depends on !RAID6_PQ_BENCHMARK help Enable this option to support time travel inside the UML instance. |