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Kernel: Switch process file descriptor table from spinlock to mutex

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There's no reason for this to use a spinlock. Instead, let's allow
threads to block if someone else is using the descriptor table.
This commit is contained in:
Andreas Kling 2022-01-29 01:29:07 +01:00
parent 8ebec2938c
commit b56646e293
16 changed files with 37 additions and 37 deletions
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2
Kernel/Syscalls/poll.cpp
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@ -49,7 +49,7 @@ ErrorOr<FlatPtr> Process::sys$poll(Userspace<const Syscall::SC_poll_params*> use
for (size_t i = 0; i < params.nfds; i++) {
auto& pfd = fds_copy[i];
auto description = TRY(m_fds.with([&](auto& fds) { return fds.open_file_description(pfd.fd); }));
auto description = TRY(m_fds.with_shared([&](auto& fds) { return fds.open_file_description(pfd.fd); }));
BlockFlags block_flags = BlockFlags::Exception; // always want POLLERR, POLLHUP, POLLNVAL
if (pfd.events & POLLIN)
block_flags |= BlockFlags::Read;