And that code is actually fairly recent. We _used_ to do this right, and
the code was
if (vm_flags & VM_LOCKED) {
mm->locked_vm += len >> PAGE_SHIFT;
make_pages_present(addr, addr + len);
}
and we intentionally did _not_ pass in the vma, but we broke it a couple
of months ago in commit ba470de43188cdbff795b5da43a1474523c6c2fb ("mmap:
handle mlocked pages during map, remap, unmap").
Guilty parties added to Cc:
> >> >> static uint32_t lowmem_debug_level = 2;
> >> >> static int lowmem_adj[6] = {
> >> >
> >> > why do you choice [6]?
> >>
> >> We use six levels.
> >
> > if you don't consider other user and other usage case,
> > this file can't merge forever.
>
> I never expected it to be merged. I wrote it to allow us to ship a product.
>
Then, please write "DON'T MERGE ME" on the top of patch description.
we can adjust our viewpoints.
Thx,
-Kame
As far as I'm concerned, digital cameras have been more useful than kernel dumps to kernel debugging.
kyle@minerva ~/rpms/kernel/devel $ grep CGROUP config-generic
CONFIG_NET_CLS_CGROUP=y
CONFIG_CGROUP_SCHED=y
CONFIG_CGROUP_MEM_RES_CTLR=y
CONFIG_CGROUP_MEM_RES_CTLR_SWAP=y
CONFIG_CGROUPS=y
# CONFIG_CGROUP_DEBUG is not set
CONFIG_CGROUP_NS=y
CONFIG_CGROUP_CPUACCT=y
CONFIG_CGROUP_DEVICE=y
CONFIG_CGROUP_FREEZER=y
CONFIG_CGROUP_MEM_CONT=y
kyle@minerva ~/rpms/kernel/devel $
