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SubjectRe: [PATCH next] vt: fix a warning when kmalloc alloc large memory
On Fri, Mar 27, 2020 at 10:55:14PM -0400, Nicolas Pitre wrote:
> On Sat, 28 Mar 2020, Chen Wandun wrote:
>
> > If the memory size that use kmalloc() to allocate exceed MAX_ORDER pages,
> > it will hit the WARN_ON_ONCE(!(gfp_mask & __GFP_NOWARN)), so add memory
> > allocation flag __GFP_NOWARN to silence a warning, othervise, it will
> > cause panic if panic_on_warn is enable.
>
> Wow! How do you manage that? You need something like a 1024x1024 text
> screen to get such a big memory allocation.

ioctl(VT_RESIZE) allows up to 32767x32767, unprivileged for a local user.
That's 4GB per console.


Meow!
--
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⣾⠁⢠⠒⠀⣿⡁ in the beginning was the boot and root floppies and they were good.
⢿⡄⠘⠷⠚⠋⠀ -- <willmore> on #linux-sunxi
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