On Thu, Sep 14 2017, walter harms wrote: > Am 14.09.2017 01:50, schrieb NeilBrown: >> >> Since 4.13, errors from writeback are more reliably reported >> to all file descriptors that might be relevant. >> >> Add notes to this effect, and also add details about ENOSPC and EDQUOT >> which can be delayed in a similar manner to EIO - for NFS in particular. >> > > I never read EDQUOT before but it is real: > > see: > http://elixir.free-electrons.com/linux/latest/source/security/keys/request_key.c > > -EDQUOT > * if insufficient key quota was available to create a new key EDQUOT existed long before security keys. It's original purpose is to report Disk QUOTa problems. If you write to a file and you have exhausted you quota, you get EDQUOT. http://elixir.free-electrons.com/linux/latest/source/fs/quota/dquot.c#L1318 NeilBrown
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