Maximum amount of kernel memory that TMPFS can use for its data structures (tmpnodes and directory entries).
Unsigned long
One page or 4% of physical memory, whichever is greater.
Number of bytes in one page (8192 for UltraSPARCTM systems, 4096 for all others) to 25% of the available kernel memory at the time TMPFS was first used.
Bytes
Yes
None
Increase if the following message is displayed on the console or written in the messages file.
tmp_memalloc: tmpfs over memory limit |
The current amount of memory used by TMPFS for its data structures is held in the tmp_kmemspace field, which can be examined with a kernel debugger.
Unstable