From: Adam Borowski <kilobyte@angband.pl>
To: Nicolas Pitre <nico@fluxnic.net>
Cc: Chen Wandun <chenwandun@huawei.com>,
jslaby@suse.com, gregkh@linuxfoundation.org,
daniel.vetter@ffwll.ch, sam@ravnborg.org,
b.zolnierkie@samsung.com, lukas@wunner.de, ghalat@redhat.com,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH next] vt: fix a warning when kmalloc alloc large memory
Date: Sat, 28 Mar 2020 04:12:57 +0100 [thread overview]
Message-ID: <20200328031257.GA30454@angband.pl> (raw)
In-Reply-To: <nycvar.YSQ.7.76.2003272232340.2671@knanqh.ubzr>
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!
--
⢀⣴⠾⠻⢶⣦⠀
⣾⠁⢠⠒⠀⣿⡁ in the beginning was the boot and root floppies and they were good.
⢿⡄⠘⠷⠚⠋⠀ -- <willmore> on #linux-sunxi
⠈⠳⣄⠀⠀⠀⠀
next prev parent reply other threads:[~2020-03-28 3:13 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-28 2:13 Chen Wandun
2020-03-28 2:55 ` Nicolas Pitre
2020-03-28 3:12 ` Adam Borowski [this message]
2020-03-28 16:20 ` Nicolas Pitre
2020-03-28 20:50 ` Nicolas Pitre
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