An easy way to troubleshoot paging kernel issuesSeptember 29, 2020 by Anthony Middleton
You should check these fixing methods if you get a "Swap kernel" error message on your computer.
Writing pages to your hard drive into free space is called paging. If a page error subsequently occurs because the page is on disk, in swap space and not in memory, the kernel reads the page from disk and corrects the page error. This is an exchange.
Swap was introduced for hard disk backup unassigned pages. From the previous discussion, we know that there is Three types of pages to manage while sharing Subsystem:
As with paging on demand, the exchange should be transparent to programs. in
In other words, there is no need to have a specific trading instruction.
inserted into the code. To understand how to do this, remember
section " Normal
Pagination "in chapter 2
that each page table entry contains the
Present flag. The kernel uses this indicator
signal that a page belonging to the process's address space has been replaced
out. In addition to this flag, Linux also uses the remaining bits
Page table entries to save the "replaced page"
identify ", which encodes the location of the page on disk.
When a page error exception occurs, the corresponding exception handler can
Detect that the page does not exist in RAM and call the appropriate function
replaceable missing page on the hard disk.
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