Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) What:		/sys/devices/system/memory/soft_offline_page
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) Date:		Sep 2009
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) KernelVersion:	2.6.33
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) Contact:	andi@firstfloor.org
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 		Soft-offline the memory page containing the physical address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 		written into this file. Input is a hex number specifying the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 		physical address of the page. The kernel will then attempt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 		to soft-offline it, by moving the contents elsewhere or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 		dropping it if possible. The kernel will then be placed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 		on the bad page list and never be reused.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 		The offlining is done in kernel specific granuality.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 		Normally it's the base page size of the kernel, but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 		this might change.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 		The page must be still accessible, not poisoned. The
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 		kernel will never kill anything for this, but rather
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 		fail the offline.  Return value is the size of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 		number, or a error when the offlining failed.  Reading
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 		the file is not allowed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) What:		/sys/devices/system/memory/hard_offline_page
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) Date:		Sep 2009
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) KernelVersion:	2.6.33
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) Contact:	andi@firstfloor.org
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) Description:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 		Hard-offline the memory page containing the physical
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 		address written into this file. Input is a hex number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 		specifying the physical address of the page. The
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 		kernel will then attempt to hard-offline the page, by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 		trying to drop the page or killing any owner or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 		triggering IO errors if needed.  Note this may kill
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 		any processes owning the page. The kernel will avoid
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 		to access this page assuming it's poisoned by the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 		hardware.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 		The offlining is done in kernel specific granuality.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 		Normally it's the base page size of the kernel, but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 		this might change.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 		Return value is the size of the number, or a error when
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 		the offlining failed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 		Reading the file is not allowed.