29.04.2024 15:17, Matthew Wilcox пишет:
CONFIG_NR_CPUS=8192
Since you're using a power-of-two, this should have been a no-op.
But bits_per() doesn't work the way I thought it did!
#define bits_per(n) \
( \
__builtin_constant_p(n) ? ( \
((n) == 0 || (n) == 1) \
? 1 : ilog2(n) + 1 \
) : \
CONFIG_NR_CPUS is obviously a constant, and larger than 1, so we end up
calling ilog2(n) + 1. So we allocate one extra bit.
I should have changed this to
DEFINE(NR_CPUS_BITS, bits_per(CONFIG_NR_CPUS - 1))
Can you test that and report back? I'll prepare a fix for mainline in
the meantime.
Yes, this fix solved the problem
