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Starting with4d330a61bbwe can use posix_fallocate() to extend files. Unfortunately in some situation, e.g. on tmpfs filesystems, EINTR may be returned. See also4518c798b2. To fix, add a retry path to FileFallocate(). In contrast to4518c798b2the amount we extend by is limited and the extending may happen at a high frequency, so disabling signals does not appear to be the correct path here. Also add retry paths to other file operations currently lacking them (around fdatasync(), fsync(), ftruncate(), posix_fadvise(), sync_file_range(), truncate()) - they are all documented or have been observed to return EINTR. Even though most of these functions used in the back branches, it does not seem worth the risk to backpatch - outside of the new-to-16 case of posix_fallocate() I am not aware of problem reports due to the lack of retries. Reported-by: Christoph Berg <myon@debian.org> Discussion: https://postgr.es/m/ZEZDj1H61ryrmY9o@msg.df7cb.de Backpatch: -