On Sat, Apr 28, 2018 at 12:28 AM, Andres Freund <and...@anarazel.de> wrote: > Before linux v4.13 errors in kernel writeback would be reported at most > once, without a guarantee that that'd happen (IIUC memory pressure could > lead to the relevant information being evicted) - but it was pretty > likely. After v4.13 (see https://lwn.net/Articles/724307/) errors are > reported exactly once to all open file descriptors for a file with an > error - but never for files that have been opened after the error > occurred.
snip > == Proposed Linux Changes == > > - Matthew Wilcox proposed (and posted a patch) that'd partially revert > behaviour to the pre v4.13 world, by *also* reporting errors to > "newer" file-descriptors if the error hasn't previously been > reported. That'd still not guarantee that the error is reported > (memory pressure could evict information without open fd), but in most > situations we'll again get the error in the checkpointer. > > This seems largely be agreed upon. It's unclear whether it'll go into > the stable backports for still-maintained >= v4.13 kernels. This is now merged, if it's not reverted it will appear in v4.17. https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fff75eb2a08c2ac96404a2d79685668f3cf5a7a3 The commit is cc-ed to stable so it should get picked up in the near future. https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b4678df184b314a2bd47d2329feca2c2534aa12b
