Messages in this thread | | | Date | Thu, 7 Jun 2018 18:52:13 +0200 | From | David Sterba <> | Subject | Re: kernel BUG at fs/btrfs/volumes.c:LINE! |
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On Thu, Jun 07, 2018 at 06:28:02PM +0200, Dmitry Vyukov wrote: > > Normally the GFP_NOFS allocations do not fail so I think the fuzzer > > environment is tuned to allow that, which is fine for coverage but does > > not happen in practice. This will be fixed eventually. > > Isn't GFP_NOFS more restricted than normal allocations? Are these > allocations accounted against memcg? It's easy to fail any allocation > within a memory container.
https://lwn.net/Articles/723317/ The 'too small to fail' and some unwritten semantics of GFP_NOFS but I think you're right about the memory controler that can fail any allocation though.
Error handling is being improved over time, the memory allocation failures are in some cases hard and this one would need to update some logic so it's not a oneliner.
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