[PATCH 09/14] resource limits: track highwater mark of locked memory
oleg at redhat.com
Sat Jul 16 01:14:08 AEST 2016
On 07/15, Topi Miettinen wrote:
> Track maximum size of locked memory, to be able to configure
> RLIMIT_MEMLOCK resource limits. The information is available
> with taskstats and cgroupstats netlink socket.
So I personally still dislike the very idea of this series... but I won't
argue if you convince maintainers.
> @@ -2020,6 +2020,10 @@ static int acct_stack_growth(struct vm_area_struct *vma, unsigned long size, uns
> return -ENOMEM;
> update_resource_highwatermark(RLIMIT_STACK, actual_size);
> + if (vma->vm_flags & VM_LOCKED)
> + update_resource_highwatermark(RLIMIT_MEMLOCK,
> + (mm->locked_vm + grow) <<
> + PAGE_SHIFT);
Btw this is not right. The same for the previous patch which tracks
RLIMIT_STACK. The "current" task can debugger/etc.
Yes, yes, this just reminds that the whole rlimit logic in this path
is broken but still...
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