Thread: pgsql: Tolerate ENOSYS failure from sync_file_range().
Tolerate ENOSYS failure from sync_file_range(). One unintended consequence of commit 9ccdd7f6 was that Windows WSL users started getting a panic whenever we tried to initiate data flushing with sync_file_range(), because WSL does not implement that system call. Previously, they got a stream of periodic warnings, which was also undesirable but at least ignorable. Prevent the panic by handling ENOSYS specially and skipping the panic promotion with data_sync_elevel(). Also suppress future attempts after the first such failure so that the pre-existing problem of noisy warnings is improved. Back-patch to 9.6 (older branches were not affected in this way by 9ccdd7f6). Author: Thomas Munro and James Sewell Tested-by: James Sewell Reported-by: Bruce Klein Discussion: https://postgr.es/m/CA+mCpegfOUph2U4ZADtQT16dfbkjjYNJL1bSTWErsazaFjQW9A@mail.gmail.com Branch ------ REL_10_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/387483e89b2851247e091013bfdbfd1c448cb7df Modified Files -------------- src/backend/storage/file/fd.c | 21 ++++++++++++++++++++- 1 file changed, 20 insertions(+), 1 deletion(-)