Re: 2.6.10-mm3 scaling problem with inotify

[John Hawkes]

From: "Robert Love" <rml@xxxxxxxxxx>
...
> John Hawkes: Attached patch implements the dget() optimization in the
> same manner as dnotify.  Compile-tested but not booted.
>
> Let me know!
...
> inotify: don't do dget() unless we have to
>
>  drivers/char/inotify.c |   14 +++++++++++---
>  1 files changed, 11 insertions(+), 3 deletions(-)

The patch shows a substantial 4x improvement for my specific workload (@64p),
although I can still envision workloads that will stimulate high spinlock
contention from spin_lock(&dentry->d_lock).  First things first -- let's get
this fix into the -mm tree.  Thanks!

John Hawkes

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