linux.git/fs/proc/proc_misc.c, branch v2.6.26

pagemap: return EINVAL, not EIO, for unaligned reads of kpagecount or kpageflags

2008-06-06T18:29:13+00:00

If the user tries to read from a position that is not a multiple of 8, or
read a number of bytes that is not a multiple of 8, they have passed an
invalid argument to read, for the purpose of reading these files.  It's
not an IO error because we didn't encounter any trouble finding the data
they asked for.

Signed-off-by: Thomas Tuttle 
Cc: Matt Mackall 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

pagemap: return map count, not reference count, in /proc/kpagecount

2008-06-06T18:29:13+00:00

Since pagemap is all about examining pages mapped into processes' memory
spaces, it makes sense for kpagecount to return the map counts, not the
reference counts.

Signed-off-by: Thomas Tuttle 
Cc: Matt Mackall 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

mm: fix atomic_t overflow in vm

2008-05-24T16:56:09+00:00

The atomic_t type is 32bit but a 64bit system can have more than 2^32
pages of virtual address space available.  Without this we overflow on
ludicrously large mappings

Signed-off-by: Alan Cox 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

mm: Add NR_WRITEBACK_TEMP counter

2008-04-30T15:29:50+00:00

Fuse will use temporary buffers to write back dirty data from memory mappings
(normal writes are done synchronously).  This is needed, because there cannot
be any guarantee about the time in which a write will complete.

By using temporary buffers, from the MM's point if view the page is written
back immediately.  If the writeout was due to memory pressure, this
effectively migrates data from a full zone to a less full zone.

This patch adds a new counter (NR_WRITEBACK_TEMP) for the number of pages used
as temporary buffers.

[Lee.Schermerhorn@hp.com: add vmstat_text for NR_WRITEBACK_TEMP]
Signed-off-by: Miklos Szeredi 
Cc: Christoph Lameter 
Signed-off-by: Lee Schermerhorn 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

proc: remove proc_root from drivers

2008-04-29T15:06:18+00:00

Remove proc_root export.  Creation and removal works well if parent PDE is
supplied as NULL -- it worked always that way.

So, one useless export removed and consistency added, some drivers created
PDEs with &proc_root as parent but removed them as NULL and so on.

Signed-off-by: Alexey Dobriyan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

proc: switch to proc_create()

2008-04-29T15:06:17+00:00

Signed-off-by: Alexey Dobriyan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

vmalloc: show vmalloced areas via /proc/vmallocinfo

2008-04-28T15:58:21+00:00

Implement a new proc file that allows the display of the currently allocated
vmalloc memory.

It allows to see the users of vmalloc.  That is important if vmalloc space is
scarce (i386 for example).

And it's going to be important for the compound page fallback to vmalloc.
Many of the current users can be switched to use compound pages with fallback.
 This means that the number of users of vmalloc is reduced and page tables no
longer necessary to access the memory.  /proc/vmallocinfo allows to review how
that reduction occurs.

If memory becomes fragmented and larger order allocations are no longer
possible then /proc/vmallocinfo allows to see which compound page allocations
fell back to virtual compound pages.  That is important for new users of
virtual compound pages.  Such as order 1 stack allocation etc that may
fallback to virtual compound pages in the future.

/proc/vmallocinfo permissions are made readable-only-by-root to avoid possible
information leakage.

[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: CONFIG_MMU=n build fix]
Signed-off-by: Christoph Lameter 
Reviewed-by: KOSAKI Motohiro 
Cc: Hugh Dickins 
Cc: Nick Piggin 
Cc: Arjan van de Ven 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

block/genhd.c: proper externs

2008-03-04T10:28:36+00:00

This patch adds proper externs for two structs in include/linux/genhd.h

Signed-off-by: Adrian Bunk 
Signed-off-by: Jens Axboe

procfs: constify function pointer tables

2008-02-08T17:22:38+00:00

Signed-off-by: Jan Engelhardt 
Acked-by: Geert Uytterhoeven 
Acked-by: Mike Frysinger 
Acked-By: David Howells 
Acked-by: Bryan Wu 
Acked-by: Jesper Nilsson 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

proc: loadavg reading race

2008-02-06T18:41:04+00:00

The avenrun[] values are supposed to be protected by xtime_lock.
loadavg_read_proc does not use it.  Theoretically this may result in an
occasional glitch when the value read from /proc/loadavg would be as much
as 1<<11 times higher than it should be.

Signed-off-by: Michal Schmidt 
Cc: Thomas Gleixner 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds