Date: Thu, 26 Jun 2014 17:01:23 -0700
From: Matthew Dempsky matt...@dempsky.org
On Thu, Jun 26, 2014 at 12:28:18PM -0700, Matthew Dempsky wrote:
I just reviewed our mmap(2) flags to compare them against Linux,
FreeBSD, Solaris, and Darwin's flags. Of the flags listed below, none
of
Date: Thu, 26 Jun 2014 12:28:18 -0700
From: Matthew Dempsky matt...@dempsky.org
I just reviewed our mmap(2) flags to compare them against Linux,
FreeBSD, Solaris, and Darwin's flags. Of the flags listed below, none
of them are specified by POSIX, and none of them do anything
interesting
On Fri, Jun 27, 2014 at 02:46:01PM +0200, Mark Kettenis wrote:
Losing the descriptions of the no-op flags is a bit unfortunate.
Can you add those back?
Okay, restored them below. Also tested that kdump can handle this
change gracefully.
In this diff I've also moved MAP_FILE down to the legacy
MAP_HASSEMAPHORE is used in rthread_sem.c, but it doesn't do anything,
so I suspect it's just cargo culting based on man page misinformation?
Are there architectures that actually have restrictions on semaphore
memory?
There architectures where atomic instructions only work on pages
I just reviewed our mmap(2) flags to compare them against Linux,
FreeBSD, Solaris, and Darwin's flags. Of the flags listed below, none
of them are specified by POSIX, and none of them do anything
interesting on OpenBSD: MAP_COPY just gets rewritten to MAP_PRIVATE,
and the rest are silently
On 06/26/2014 03:28 PM, Matthew Dempsky wrote:
I just reviewed our mmap(2) flags to compare them against Linux,
FreeBSD, Solaris, and Darwin's flags. Of the flags listed below, none
of them are specified by POSIX, and none of them do anything
interesting on OpenBSD: MAP_COPY just gets rewritten
On Thu, Jun 26, 2014 at 12:28:18PM -0700, Matthew Dempsky wrote:
I just reviewed our mmap(2) flags to compare them against Linux,
FreeBSD, Solaris, and Darwin's flags. Of the flags listed below, none
of them are specified by POSIX, and none of them do anything
interesting on OpenBSD: MAP_COPY
1. MAP_COPY is redefined as an alias for MAP_PRIVATE, and the other
useless MAP_* flags are redefined to 0. They're also hidden from the
kernel to make sure no kernel code accidentally depends on them still.
2. Adds COMPAT_O55_MAP_COPY so we can stay binary compatible with any
OpenBSD 5.5
