On Sat, May 28, 2011 at 09:45:16AM +0200, Michael Weissenbacher wrote:
> Hi List!
> From linux-2.6.39/Documentation/filesystems/xfs.txt:
> Set the number of in-memory log buffers. Valid numbers range
> from 2-8 inclusive.
> The default value is 8 buffers for filesystems with a
> blocksize of 64KiB, 4 buffers for filesystems with a blocksize
> of 32KiB, 3 buffers for filesystems with a blocksize of 16KiB
> and 2 buffers for all other configurations. Increasing the
> number of buffers may increase performance on some workloads
> at the cost of the memory used for the additional log buffers
> and their associated control structures.
> Is this still valid? I thought that newer kernels would always use 8 as
No, it's not. Patches to fix the documentation are welcome.