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From: David Laight <David.Laight@ACULAB.COM>
To: 'Steven Sistare' <steven.sistare@oracle.com>,
	Jason Gunthorpe <jgg@ziepe.ca>
Cc: Matthew Wilcox <willy@infradead.org>,
	"Eric W. Biederman" <ebiederm@xmission.com>,
	Anthony Yznaga <anthony.yznaga@oracle.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
	"linux-mm@kvack.org" <linux-mm@kvack.org>,
	"linux-arch@vger.kernel.org" <linux-arch@vger.kernel.org>,
	"mhocko@kernel.org" <mhocko@kernel.org>,
	"tglx@linutronix.de" <tglx@linutronix.de>,
	"mingo@redhat.com" <mingo@redhat.com>,
	"bp@alien8.de" <bp@alien8.de>, "x86@kernel.org" <x86@kernel.org>,
	"hpa@zytor.com" <hpa@zytor.com>,
	"viro@zeniv.linux.org.uk" <viro@zeniv.linux.org.uk>,
	"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
	"arnd@arndb.de" <arnd@arndb.de>,
	"keescook@chromium.org" <keescook@chromium.org>,
	"gerg@linux-m68k.org" <gerg@linux-m68k.org>,
	"ktkhai@virtuozzo.com" <ktkhai@virtuozzo.com>,
	"christian.brauner@ubuntu.com" <christian.brauner@ubuntu.com>,
	"peterz@infradead.org" <peterz@infradead.org>,
	"esyr@redhat.com" <esyr@redhat.com>,
	"christian@kellner.me" <christian@kellner.me>,
	"areber@redhat.com" <areber@redhat.com>,
	"cyphar@cyphar.com" <cyphar@cyphar.com>
Subject: RE: [RFC PATCH 0/5] madvise MADV_DOEXEC
Date: Mon, 3 Aug 2020 08:32:19 +0000	[thread overview]
Message-ID: <09ce47c0a97c482b95b8b521e9ee33d4@AcuMS.aculab.com> (raw)
In-Reply-To: <f4ce3f4a-bdee-ec43-986c-8e4d8b1d2ddc@oracle.com>

> Maybe.  We still need to preserve an anonymous segment, though.  MADV_DOEXEC, or mshare,
> or something else.  And I think the ability to preserve memory containing pointers to itself
> is an interesting use case, though not ours.

Why does all this remind me of the old sendmail code.
After parsing the config file it used to write its entire data
area out to a file.
On restart, if the config file hadn't changed it would read it back it.

It sort of worked - until shared libraries came along.
Then it had a habit of generating random crashes.

	David

-
Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK
Registration No: 1397386 (Wales)

  reply	other threads:[~2020-08-03  8:32 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-27 17:11 Anthony Yznaga
2020-07-27 17:07 ` Eric W. Biederman
2020-07-27 18:00   ` Steven Sistare
2020-07-28 13:40     ` Christian Brauner
2020-07-27 17:11 ` [RFC PATCH 1/5] elf: reintroduce using MAP_FIXED_NOREPLACE for elf executable mappings Anthony Yznaga
2020-07-27 17:11 ` [RFC PATCH 2/5] mm: do not assume only the stack vma exists in setup_arg_pages() Anthony Yznaga
2020-07-27 17:11 ` [RFC PATCH 3/5] mm: introduce VM_EXEC_KEEP Anthony Yznaga
2020-07-28 13:38   ` Eric W. Biederman
2020-07-28 17:44     ` Anthony Yznaga
2020-07-29 13:52   ` Kirill A. Shutemov
2020-07-29 23:20     ` Anthony Yznaga
2020-07-27 17:11 ` [RFC PATCH 4/5] exec, elf: require opt-in for accepting preserved mem Anthony Yznaga
2020-07-27 17:11 ` [RFC PATCH 5/5] mm: introduce MADV_DOEXEC Anthony Yznaga
2020-07-28 13:22   ` Kirill Tkhai
2020-07-28 14:06     ` Steven Sistare
2020-07-28 11:34 ` [RFC PATCH 0/5] madvise MADV_DOEXEC Kirill Tkhai
2020-07-28 17:28   ` Anthony Yznaga
2020-07-28 14:23 ` Andy Lutomirski
2020-07-28 14:30   ` Steven Sistare
2020-07-30 15:22 ` Matthew Wilcox
2020-07-30 15:27   ` Christian Brauner
2020-07-30 15:34     ` Matthew Wilcox
2020-07-30 15:54       ` Christian Brauner
2020-07-31  9:12     ` Stefan Hajnoczi
2020-07-30 15:59   ` Steven Sistare
2020-07-30 17:12     ` Matthew Wilcox
2020-07-30 17:35       ` Steven Sistare
2020-07-30 17:49         ` Matthew Wilcox
2020-07-30 18:27           ` Steven Sistare
2020-07-30 21:58             ` Eric W. Biederman
2020-07-31 14:57               ` Steven Sistare
2020-07-31 15:27                 ` Matthew Wilcox
2020-07-31 16:11                   ` Steven Sistare
2020-07-31 16:56                     ` Jason Gunthorpe
2020-07-31 17:15                       ` Steven Sistare
2020-07-31 17:48                         ` Jason Gunthorpe
2020-07-31 17:55                           ` Steven Sistare
2020-08-03  8:32                             ` David Laight [this message]
2020-07-31 17:23                     ` Matthew Wilcox
2020-08-03 15:28                 ` Eric W. Biederman
2020-08-03 15:42                   ` James Bottomley
2020-08-03 20:03                     ` Steven Sistare
2020-08-04  8:44                     ` David Laight
2020-08-04 11:13                       ` Matthew Wilcox
2020-08-03 19:29                   ` Steven Sistare
2020-07-31 19:41 ` Steven Sistare
2021-07-08  9:52 ` Longpeng (Mike, Cloud Infrastructure Service Product Dept.)
2021-07-08 12:48   ` Steven Sistare

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