On Thu, 25 Apr 2019 16:57:47 -0400 Joel Savitz <jsavitz@xxxxxxxxxx> wrote: > Currently, there is no fast mechanism to get the virtual memory size of > the current process from userspace. This information is available to the > user through several means, one being a linear search of the entire address > space. This is the method used by a component of the libhugetlb kernel > test, and using the mechanism proposed in this patch, the time complexity > of that test would be upgraded to constant time from linear time. This is > especially relevant on 64-bit architechtures where a linear search of > the address space could take an absurd amount of time. Using this > mechanism, the modification to the test component would be portable > across all architechtures. Please include all details on the observed performance improvements. > fs/proc/task_mmu.c | 5 ++++- > 1 file changed, 4 insertions(+), 1 deletion(-) Please update Documentation/filesystems/proc.txt.
