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Kernel: Return the actual number of CPU cores that we have

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... instead of returning the maximum number of Processor objects that we
can allocate.

Some ports (e.g. gdb) rely on this information to determine the number
of worker threads to spawn. When gdb spawned 64 threads, the kernel
could not cope with generating backtraces for it, which prevented us
from debugging it properly.

This commit also removes the confusingly named
`Processor::processor_count` function so that this mistake can't happen
again.
This commit is contained in:
Daniel Bertalan 2021-12-16 18:11:25 +01:00 committed by Brian Gianforcaro
parent 7828d4254e
commit fcdd202741
2 changed files with 1 additions and 3 deletions
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2
Kernel/Arch/x86/Processor.h
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@ -179,8 +179,6 @@ public:
void flush_gdt();
const DescriptorTablePointer& get_gdtr();
static size_t processor_count() { return processors().size(); }
template<IteratorFunction<Processor&> Callback>
static inline IterationDecision for_each(Callback callback)
{

2
Kernel/Syscalls/sysconf.cpp
View file

@ -18,7 +18,7 @@ ErrorOr<FlatPtr> Process::sys$sysconf(int name)
return 1;
case _SC_NPROCESSORS_CONF:
case _SC_NPROCESSORS_ONLN:
return Processor::processor_count();
return Processor::count();
case _SC_OPEN_MAX:
return OpenFileDescriptions::max_open();
case _SC_PAGESIZE: