Re: [PATCH] fs/proc: add VmTaskSize field to /proc/$$/status

2019-04-25 Thread Andrew Morton
On Thu, 25 Apr 2019 16:57:47 -0400 Joel Savitz 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

Re: [PATCH] fs/proc: add VmTaskSize field to /proc/$$/status

2019-04-25 Thread Alexey Dobriyan
On Thu, Apr 25, 2019 at 04:57:47PM -0400, Joel Savitz wrote: > Currently, there is no fast mechanism to get the virtual memory size of > the current process from userspace. > --- a/fs/proc/task_mmu.c > +++ b/fs/proc/task_mmu.c > @@ -74,7 +74,10 @@ void task_mem(struct seq_file *m, struct mm_struct

Re: [PATCH] fs/proc: add VmTaskSize field to /proc/$$/status

2019-04-25 Thread Rafael Aquini
On Thu, Apr 25, 2019 at 04:57:47PM -0400, Joel Savitz 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. Th

[PATCH] fs/proc: add VmTaskSize field to /proc/$$/status

2019-04-25 Thread Joel Savitz
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, a