| From | Arnd Bergmann <> | Subject | Re: [patch 4/15] fs/logfs/compr.c | Date | Thu, 10 Apr 2008 16:13:47 +0200 |
| |
On Tuesday 01 April 2008, joern@logfs.org wrote: > + > +static DEFINE_MUTEX(compr_mutex); > +static struct z_stream_s stream; > +
How much time is spent in the compression code? Would it be helpful to have a percpu stream and do preempt_disable around it instead of the mutex?
That would improve parallelism and cache-locality of the compression, at the cost of adding a source of latency to preemptible kernels.
Arnd <><
|