Date: Thu, 01 Nov 2018 19:53:16 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 232878] File sealing Message-ID: <bug-232878-227-uVMaPifCJG@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-232878-227@https.bugs.freebsd.org/bugzilla/> References: <bug-232878-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D232878 --- Comment #3 from contact@emersion.fr --- Some more information on the flag from Mark Kettenis: > The flag is called __MAP_NOFAULT. It is somewhat deliberately > undocumented as we didn't want to encourage people too much to use it. >=20 > The flag gets translated into UVM_ET_NOFAULT in OpenBSD's vm > subsystem. The idea is that if the pages backing the mapping are not > available (i.e. if a file got truncated) it will be replaced with > anonymous zero-filled memory. In other words, if the mapped data for > a specific memory page isn't available it would behave as if the page > was mapped with the MAP_ANON flag. --=20 You are receiving this mail because: You are the assignee for the bug.=
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