On Tue, 4 Feb 2014 09:38:27 -0500 Dave Botsch <[email protected]> wrote:
> I'm seeing a fair amount of these on a daily basis. At this point, I > believe I'm seeing them mostly from my RHEL6/64 machines running the > latest RHEL6.5 kernel and oafs 1.6.5.2 : The way I'm reading this, it sounds like you're seeing multiple instances of this on the same machine while the machine is booted. Is that correct? I believe this is a WARN_ON_ONCE warning, which should only happen once while the machine is booted. But maybe I am misreading something or looking at the wrong thing. > backtrace: > :WARNING: at fs/dcache.c:1249 d_splice_alias+0x16e/0x180() (Tainted: P > --------------- ) I'm still waiting for redpatch.git to download, but from looking around the kernel git, I would guess this is a variant of 7732a557b1342c6e6966efb5f07effcf99f56167, with an extra WARN_ON_ONCE to detect when the relevant code path is hit. That commit was reverted in Linux master because there apparently was a code path that could hit it (without openafs); I assume Red Hat put it back in because they thought it was impractical to hit, or they wanted to find out what it was. But yeah, that looks like a problem. Our days of trying to dance around dcache issues may be at an end, and so we may need to rework how we interact with dcaches... Oh, but if you want a workaround or something, you may be able to avoid this if you can avoid accessing the same volume from different mountpoints. -- Andrew Deason [email protected] _______________________________________________ OpenAFS-info mailing list [email protected] https://lists.openafs.org/mailman/listinfo/openafs-info
