From: Alexey Dobriyan <adobriyan@gmail.com>
To: Al Viro <viro@zeniv.linux.org.uk>
Cc: Pascal Bouchareine <kalou@tfz.net>,
linux-kernel@vger.kernel.org, linux-api@vger.kernel.org,
netdev@vger.kernel.org, "David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH 1/2] mm: add GFP mask param to strndup_user
Date: Sun, 16 Aug 2020 19:10:15 +0300 [thread overview]
Message-ID: <20200816161015.GA242961@localhost.localdomain> (raw)
In-Reply-To: <20200815224210.GA1236603@ZenIV.linux.org.uk>
On Sat, Aug 15, 2020 at 11:42:10PM +0100, Al Viro wrote:
> On Sat, Aug 15, 2020 at 11:23:43AM -0700, Pascal Bouchareine wrote:
> > Let caller specify allocation.
> > Preserve existing calls with GFP_USER.
>
> Bloody bad idea, unless you slap a BUG_ON(flags & GFP_ATOMIC) on it,
> to make sure nobody tries _that_. Note that copying from userland
> is an inherently blocking operation, and this interface invites
> just that.
>
> What do you need that flag for, anyway?
You need it for kmem accounting.
next prev parent reply other threads:[~2020-08-16 16:10 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-15 18:23 [RFC PATCH 0/2] proc,socket: attach description to sockets Pascal Bouchareine
2020-08-15 18:23 ` [PATCH 1/2] mm: add GFP mask param to strndup_user Pascal Bouchareine
2020-08-15 22:42 ` Al Viro
2020-08-16 16:10 ` Alexey Dobriyan [this message]
2020-08-15 18:23 ` [PATCH 2/2] net: socket: implement SO_DESCRIPTION Pascal Bouchareine
2020-08-16 5:02 ` kernel test robot
2020-08-16 7:33 ` kernel test robot
2020-08-16 7:33 ` [RFC PATCH] net: socket: sock_set_description() can be static kernel test robot
2020-08-16 9:00 ` [PATCH 2/2] net: socket: implement SO_DESCRIPTION kernel test robot
2020-08-16 18:15 ` Eric Dumazet
2020-08-16 19:30 ` Pascal Bouchareine
2020-08-22 3:28 ` [PATCH v2 1/2] mm: add GFP mask param to strndup_user Pascal Bouchareine
2020-08-22 3:28 ` [PATCH v2 2/2] net: socket: implement SO_DESCRIPTION Pascal Bouchareine
2020-08-22 6:57 ` kernel test robot
2020-08-22 19:36 ` David Miller
2020-08-22 19:59 ` Pascal Bouchareine
2020-08-22 20:19 ` Pascal Bouchareine
2020-08-22 20:53 ` Pascal Bouchareine
2020-08-22 21:01 ` David Miller
2020-08-23 22:28 ` Pascal Bouchareine
2020-08-22 3:51 ` [PATCH v2 1/2] mm: add GFP mask param to strndup_user Andrew Morton
2020-08-22 19:36 ` Pascal Bouchareine
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