NAND flash memory wear & virtual memory page swap For a linux kernel with virtual memory and disk storage, pages are swapped back and forth into swap area. But embedded systems generally use NAND flash instead of disk. A NAND flash has a limited number of writes allowed, as guaranteed by its manufacturer (although the limit is high in most cases). How the wear out in this page swapping case is handled in kernel ? Or the Linux based embedded systems generally turn off the virtual memory page swap to avoid NAND flash wear and tear ?

Embedded systems running on flash don't use swap. Please don't confuse that with virtual memory though - virtual memory has many more usages then just swapping to disk.