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authorChunwei Chen <[email protected]>2016-10-26 00:32:23 -0400
committerBrian Behlendorf <[email protected]>2016-11-29 14:34:33 -0800
commit982957483450d53683681f456d1c84cfeb56afad (patch)
tree6efbe72e9a2b57474e855dae9d74377443bc9f27 /cmd
parent4f60152910c6bbc1c7975409f852af7ef11c7007 (diff)
ABD optimized page allocation code
* Convert ABD to use the Linux Kernel scatterlist implementation instead of the hand rolled one from illumos. * Scatter ABDs are preferentially populated with higher order compound pages from a single zone. Allocation size is progressively decreased until it can be satisfied without performing reclaim or compaction. * An alternate page allocator is provided for kernels older than 3.6 and for CONFIG_HIGHMEM systems. This allocator is designed as a fallback for maximum compatibility. * Extended abdstats to provide visibility in the the allocator. * Add cached value for PAGESIZE in userspace. Contributions-by: Chunwei Chen <[email protected]> Gvozden Neskovic <[email protected]> Jinshan Xiong <[email protected]> Isaac Huang <[email protected]> David Quigley <[email protected]> Brian Behlendorf <[email protected]>
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