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SubjectRe: vfs-scale, general questions
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On Thu, 20 Jan 2011, J. R. Okajima wrote:
> You might think about the race around d_move, but what I meant is the
> race between d_unlinked and unhash/rehash.
>
> - getcwd return -ENOENT when pwd is unhashed.
> - vfs_rename_dir()
> + makes the existing target unhashed.

No it doesn't. dentry_unhash() doesn't drop the dentry from the hash
unless it has no other references, cwd being one such ref.

Thanks,
Miklos


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