On Thu, Jul 21, 2011 at 12:48 PM, Linus Torvalds
<[email protected]> wrote:
> Oh, this didn't get marked for stable.
Thank you, yes, please do add to stable.
>
> It's commit 59430262401b, "vfs: fix race in rcu lookup of pruned
> dentry", and it applies to 39 too.
>
> It turns out 2.6.38 got it right. The bug was introduced by
> 62a7375e5d77 ("vfs - check non-mountpoint dentry might block in
> __follow_mount_rcu()").
That fits brilliantly. Though I'd claimed "Since the RCU dcache
lookup came in", in fact my records show no problem before 2.6.39-rc4.
I think I did see it once before then, and just made a mental note
until it happened again, can't say which rel.
Everything running nicely here with last night's git, by the way.
Hugh
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