Willy Tarreau 1673c4a883 MINOR: fd: implement an exclusive syscall bit to remove the ugly "log" lock ... There is a function called fd_write_frag_line() that's essentially used by loggers and that is used to write an atomic message line over a file descriptor using writev(). However a lock is required around the writev() call to prevent messages from multiple threads from being interleaved. Till now a SPIN_TRYLOCK was used on a dedicated lock that was common to all FDs. This is quite not pretty as if there are multiple output pipes to collect logs, there will be quite some contention. Now that there are empty flags left in the FD state and that we can finally use atomic ops on them, let's add a flag to indicate the FD is locked for exclusive access by a syscall. At least the locking will now be on an FD basis and not the whole process, so we can remove the log_lock.		2021-04-07 18:18:37 +02:00
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haproxy	MINOR: fd: implement an exclusive syscall bit to remove the ugly "log" lock	2021-04-07 18:18:37 +02:00
import	BUG/MINOR: xxhash: make sure armv6 uses memcpy()	2021-02-04 17:14:58 +01:00