Date: Sat, 03 Dec 2011 09:16:24 +0000 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: Filippo Sironi <filippo.sironi@gmail.com> Cc: freebsd-hackers@freebsd.org Subject: Re: mmap implementation for cdev Message-ID: <10964.1322903784@critter.freebsd.dk> In-Reply-To: Your message of "Sat, 03 Dec 2011 09:42:44 %2B0100." <A51F9B30-A71A-49A5-B684-16EC3C127BC9@gmail.com>
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In message <A51F9B30-A71A-49A5-B684-16EC3C127BC9@gmail.com>, Filippo Sironi wri tes: >The problem is that when I come = >back to user space all the threads write in memory page mapped by the = >first thread that called the mmap leaving their memory pages untouched. That's how cdev->mmap works, it is global rather than per-thread. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.
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