linux-kernel - Re: Regression: Requiring CAP_SYS_ADMIN for /proc/<pid>/pagemap causes application-level breakage

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Message-ID: <CA+55aFw-dK4U3Z_gi5wEdGsPz0ZaQMizETKqS-=ajpDAu03Fnw@mail.gmail.com>
Date:	Wed, 29 Apr 2015 14:18:49 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	"Kirill A. Shutemov" <kirill@...temov.name>
Cc:	Konstantin Khlebnikov <koct9i@...il.com>,
	Mark Williamson <mwilliamson@...o-software.com>,
	Mark Seaborn <mseaborn@...omium.org>,
	kernel list <linux-kernel@...r.kernel.org>,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Pavel Emelyanov <xemul@...allels.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andy Lutomirski <luto@...capital.net>,
	Linux API <linux-api@...r.kernel.org>,
	Finn Grimwood <fgrimwood@...o-software.com>,
	Daniel James <djames@...o-software.com>
Subject: Re: Regression: Requiring CAP_SYS_ADMIN for /proc/<pid>/pagemap
 causes application-level breakage

On Wed, Apr 29, 2015 at 2:05 PM, Kirill A. Shutemov
<kirill@...temov.name> wrote:
>
> This sounds too ugly to be exposed it as ABI.

Oh, pretty it ain't. However, regressions in many ways are worse. If
it makes it possible to not regress...

                     Linus
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