dkurochkin/squid — comment on commit b28de5f85a092fbeb64434c0fdea5a4c03be1ad9
File: src/DiskIO/IpcIo/IpcIoFile.cc line 698
By rousskov:

I would remove "(likely)". At this point, we are pretty confident the next request is write. Peek is unreliable when it returns false. With a single queue reader (us!), peak is reliable when it returns true.