Messages in this thread | | | Date | Thu, 29 May 2014 04:52:33 +0100 | From | Al Viro <> | Subject | Re: fs/dcache.c - BUG: soft lockup - CPU#5 stuck for 22s! [systemd-udevd:1667] |
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On Thu, May 29, 2014 at 04:11:49AM +0100, Al Viro wrote: > On Wed, May 28, 2014 at 07:39:54PM +0100, Al Viro wrote: > > > OK, the warnings about averting your eyes very much apply; the thing below > > definitely needs more massage before it becomes acceptable (and no, it's > > not a single commit; I'm not that insane), but it changes behaviour in the > > way described above. Could you check if the livelock persists with it? > > No trace-generating code in there, so the logs should be compact enough... > > Here's an updated patch, hopefully slightly less vomit-inducing. Should > give the same behaviour as the previous one... Again, it's a cumulative > diff - I'm still massaging the splitup here.
BTW, it still leaves the "proceed to parent" case in shrink_dentry_list(); in theory, it's also vulnerable to the same livelock. Can be dealt pretty much the same way; I'd rather leave that one for right after -final, though, if the already posted variant turns out to be sufficient...
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