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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/include/asm/xor.h | |
| parent | Revert "um: Enable CONFIG_CONSTRUCTORS" (diff) | |
| download | linux-dev-d65197ad52494bed3b5e64708281b8295f76c391.tar.xz linux-dev-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 '')
| -rw-r--r-- | arch/um/include/asm/xor.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/um/include/asm/xor.h b/arch/um/include/asm/xor.h new file mode 100644 index 000000000000..7a3208c47cfc --- /dev/null +++ b/arch/um/include/asm/xor.h @@ -0,0 +1,7 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#include <asm-generic/xor.h> +#include <shared/timer-internal.h> + +/* pick an arbitrary one - measuring isn't possible with inf-cpu */ +#define XOR_SELECT_TEMPLATE(x) \ + (time_travel_mode == TT_MODE_INFCPU ? &xor_block_8regs : NULL) |