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Pau Espin Pedrol pespin at sysmocom.deHi, On 9/29/20 11:26 AM, Harald Welte wrote: > So what I think would be good is: > > * If the write_queue is empty, attempt a synchronous, non-blocking write > to stderr/file. > * Only if that write returns short (in the extreme case '0'), enqueue the > [remainder of the] log message to the write_queue for delayed storage. > Fine with this approach, I was going to suggest that too while reading your last comments. The important point here is changing the fd to be non-blocking, all the rest is basically about how to keep ordering and delays at minimum once we hit a would-block situation. In any case, I'd gor for: when pushing stuff to the fd from the queue, also push until short-write is hit, not only 1 msgb per select(). > This way we should get the best of both worlds: More or less unmodified > behavior for 99% of all cases, while avoiding any delays in those few > situations where right now we are stalling/blocking due to a full stdio buffer. > ACK. -- - Pau Espin Pedrol <pespin at sysmocom.de> http://www.sysmocom.de/ ======================================================================= * sysmocom - systems for mobile communications GmbH * Alt-Moabit 93 * 10559 Berlin, Germany * Sitz / Registered office: Berlin, HRB 134158 B * Geschaeftsfuehrer / Managing Director: Harald Welte