Re: [PATCH] fs: Work around NFS wreckage

[Nick Piggin]

On Fri, Jan 14, 2011 at 3:41 AM, Thomas Gleixner <tglx@xxxxxxxxxxxxx> wrote:
> On Thu, 13 Jan 2011, J. R. Okajima wrote:
>> Thomas Gleixner:
>> > The dcache scalability work broke NFS root filesystems.
>>       :::
>> > Check for parent equal dentry and skip the nested lock to avoid the
>> > deadlock. I'm sure this is the wrong fix, but at least it "works" :)
>>
>> With this patch, can you unmount it cleanly?
>> It skips incrementing d_count for both dentries.
>> Do we need at least one?
>

Yeah thanks everyone for reporting this.

I have a fix for it in a slightly different way, and a couple of other reported
bugs, which are going through stress testing now.

Thanks,
Nick
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