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| author | Zhang Yanfei <zhangyanfei@cn.fujitsu.com> | 2013-07-03 15:08:36 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-07-03 16:08:03 -0700 |
| commit | a11edb59a05d8d5195419bd1fc28d82752324158 (patch) | |
| tree | 1100e82327ee45c50a4f9c0e47df9e845dcf0706 /Documentation | |
| parent | 266b7a021f7dcc4d4531961a47f4ef74c3c4ab6b (diff) | |
| download | linux-a11edb59a05d8d5195419bd1fc28d82752324158.tar.gz linux-a11edb59a05d8d5195419bd1fc28d82752324158.tar.bz2 linux-a11edb59a05d8d5195419bd1fc28d82752324158.zip | |
/dev/oldmem: Remove the interface
/dev/oldmem provides the interface for us to access the "old memory" in
the dump-capture kernel. Unfortunately, no one actually uses this
interface.
And this interface could actually cause some real problems if used on ia64
where the cached/uncached accesses are mixed. See the discussion from the
link: https://lkml.org/lkml/2013/4/12/386.
So Eric suggested that we should remove /dev/oldmem as an unused piece of
code.
[akpm@linux-foundation.org: mention /dev/oldmem obsolescence in devices.txt]
Suggested-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Dave Hansen <dave@sr71.net>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Matt Fleming <matt.fleming@intel.com>
Cc: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Tony Luck <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devices.txt | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/Documentation/devices.txt b/Documentation/devices.txt index b9015912bca6..23721d3be3e6 100644 --- a/Documentation/devices.txt +++ b/Documentation/devices.txt @@ -100,8 +100,7 @@ Your cooperation is appreciated. 10 = /dev/aio Asynchronous I/O notification interface 11 = /dev/kmsg Writes to this come out as printk's, reads export the buffered printk records. - 12 = /dev/oldmem Used by crashdump kernels to access - the memory of the kernel that crashed. + 12 = /dev/oldmem OBSOLETE - replaced by /proc/vmcore 1 block RAM disk 0 = /dev/ram0 First RAM disk |