Messages in this thread | | | Date | Thu, 26 Apr 2007 00:28:03 -0700 (PDT) | From | Christoph Lameter <> | Subject | Re: [00/17] Large Blocksize Support V3 |
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On Thu, 26 Apr 2007, Nick Piggin wrote:
> But I maintain that the end result is better than the fragmentation > based approach. A lot of people don't actually want a bigger page > cache size, because they want efficient internal fragmentation as > well, so your radix-tree based approach isn't really comparable.
Me? Radix tree based approach? That approach is in the kernel. Do not create a solution where there is no problem. If we do not want to support large blocksizes then lets be honest and say so instead of redefining what a block is. The current approach is fine if one is satisfied with scatter gather and the VM overhead coming with handling these pages. I fail to see what any of what you are proposing would add to that.
Lets be clear here: A bigger page cache size if its just one is not useful. 4k page size is a good size for many files on the system and chaning it would break the binary format.. I just do not want it to be the only one because different usage scenarios may require differnet page sizes for optimal application performance.
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