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From: Alexander Leidinger <netchild@FreeBSD.org>
Date: Tue, 15 Mar 2011 13:19:26 +0000 (UTC)
To: cvs-src-old@freebsd.org
X-FreeBSD-CVS-Branch: RELENG_8
Subject: cvs commit: src/sys/compat/linux linux_stats.c
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netchild    2011-03-15 13:19:26 UTC

  FreeBSD src repository

  Modified files:        (Branch: RELENG_8)
    sys/compat/linux     linux_stats.c 
  Log:
  SVN rev 219666 on 2011-03-15 13:19:26Z by netchild
  
  MFC r218497:
    Linux' shm_open() fails because it wants to find some funky shmfs
    to construct the full pathname. It starts to search at the default
    mountpoint which is /dev/shm. If this fails it runs through fstab
    and searches for shmfs and tmpfs. Whatever it finds will be
    statfs()'ed to be checked for Linux' fs magic for shmfs (0x01021994).
  
    Ideally our tmpfs should deliver this fs magic to Linux processes, but
    as our tmpfs is considered to be an experimental feature we can not
    assume that there is always a tmpfs available.
  
    To make shared memory work in the Linuxulator, force the fs type of
    /dev/shm (which can be a symlink) to match what Linux expects. The user
    is responsible (info has to be added to the linux base ports and the docs)
    to setup a suitable link for /dev/shm.
  
    Noticed by:        Andre Albsmeier <Andre.Albsmeier@siemens.com>
    Submitted by:      Andre Albsmeier <Andre.Albsmeier@siemens.com>
  
  Revision  Changes    Path
  1.97.2.2  +9 -1      src/sys/compat/linux/linux_stats.c