linux.git/lib/Kconfig.debug, branch v2.6.17.10

[SPARC]: Handle UNWIND_INFO properly.

2006-05-12T19:45:50+00:00

For sparc32 we need R_SPARC_UA32 relocation support, for
sparc64 we need the handle R_SPARC_DISP32 relocations.

Based upon reports and initial patch by Martin Habets.

Signed-off-by: David S. Miller

[PATCH] Kconfig.debug: Set DEBUG_MUTEX to off by default

2006-04-19T16:13:51+00:00

DEBUG_MUTEX flag is on by default in current kernel configuration.

During performance testing, we saw mutex debug functions like
mutex_debug_check_no_locks_freed (called by kfree()) is expensive as it
goes through a global list of memory areas with mutex lock and do the
checking.  For benchmarks such as Volanomark and Hackbench, we have seen
more than 40% drop in performance on some platforms.  We suggest to set
DEBUG_MUTEX off by default.  Or at least do that later when we feel that
the mutex changes in the current code have stabilized.

Signed-off-by: Tim Chen 
Cc: Ingo Molnar 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PARISC] Remove obsolete CONFIG_DEBUG_IOREMAP

2006-03-30T17:48:50+00:00

Remove CONFIG_DEBUG_IOREMAP, it's now obsolete and won't work anyway.
Remove it from lib/KConfig since it was only available on parisc.

Signed-off-by: Helge Deller 
Signed-off-by: Kyle McMartin

[PATCH] Don't make debugfs depend on DEBUG_KERNEL

2006-03-27T07:29:03+00:00

We use it generally now, at least blktrace isn't a specific debug
kernel feature.

Signed-off-by: Jens Axboe

[PATCH] x86_64: Don't enable CONFIG_UNWIND_INFO by default for DEBUG_KERNEL

2006-03-25T17:14:39+00:00

DEBUG_KERNEL is often enabled just for sysrq, but this doesn't
mean the user wants more heavyweight debugging information.

Cc: jbeulich@novell.com

Signed-off-by: Andi Kleen 
Signed-off-by: Linus Torvalds

[PATCH] kconfig: clarify memory debug options

2006-03-25T16:22:54+00:00

The Kconfig text for CONFIG_DEBUG_SLAB and CONFIG_DEBUG_PAGEALLOC have always
seemed a bit confusing.  Change them to:

CONFIG_DEBUG_SLAB: "Debug slab memory allocations"
CONFIG_DEBUG_PAGEALLOC: "Debug page memory allocations"

Cc: "David S. Miller" 
Cc: Hirokazu Takata 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] slab: implement /proc/slab_allocators

2006-03-25T16:22:49+00:00

Implement /proc/slab_allocators.   It produces output like:

idr_layer_cache: 80 idr_pre_get+0x33/0x4e
buffer_head: 2555 alloc_buffer_head+0x20/0x75
mm_struct: 9 mm_alloc+0x1e/0x42
mm_struct: 20 dup_mm+0x36/0x370
vm_area_struct: 384 dup_mm+0x18f/0x370
vm_area_struct: 151 do_mmap_pgoff+0x2e0/0x7c3
vm_area_struct: 1 split_vma+0x5a/0x10e
vm_area_struct: 11 do_brk+0x206/0x2e2
vm_area_struct: 2 copy_vma+0xda/0x142
vm_area_struct: 9 setup_arg_pages+0x99/0x214
fs_cache: 8 copy_fs_struct+0x21/0x133
fs_cache: 29 copy_process+0xf38/0x10e3
files_cache: 30 alloc_files+0x1b/0xcf
signal_cache: 81 copy_process+0xbaa/0x10e3
sighand_cache: 77 copy_process+0xe65/0x10e3
sighand_cache: 1 de_thread+0x4d/0x5f8
anon_vma: 241 anon_vma_prepare+0xd9/0xf3
size-2048: 1 add_sect_attrs+0x5f/0x145
size-2048: 2 journal_init_revoke+0x99/0x302
size-2048: 2 journal_init_revoke+0x137/0x302
size-2048: 2 journal_init_inode+0xf9/0x1c4

Cc: Manfred Spraul 
Cc: Alexander Nyberg 
Cc: Pekka Enberg 
Cc: Christoph Lameter 
Cc: Ravikiran Thirumalai 
Signed-off-by: Al Viro 
DESC
slab-leaks3-locking-fix
EDESC
From: Andrew Morton 

Update for slab-remove-cachep-spinlock.patch

Cc: Al Viro 
Cc: Manfred Spraul 
Cc: Alexander Nyberg 
Cc: Pekka Enberg 
Cc: Christoph Lameter 
Cc: Ravikiran Thirumalai 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] CONFIG_UNWIND_INFO

2006-03-24T15:33:25+00:00

As a foundation for reliable stack unwinding, this adds a config option
(available to all architectures except IA64 and those where the module
loader might have problems with the resulting relocations) to enable the
generation of frame unwind information.

Signed-off-by: Jan Beulich 
Cc: Miles Bader 
Cc: "Luck, Tony" 
Cc: Ralf Baechle 
Cc: Kyle McMartin 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Cc: "David S. Miller" 
Cc: Paul Mundt ,
Cc: Andi Kleen 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] When CONFIG_CC_OPTIMIZE_FOR_SIZE, allow gcc4 to control inlining

2006-01-15T02:27:16+00:00

If optimizing for size (CONFIG_CC_OPTIMIZE_FOR_SIZE), allow gcc4 compilers
to decide what to inline and what not - instead of the kernel forcing gcc
to inline all the time.  This requires several places that require to be
inlined to be marked as such, previous patches in this series do that.

Signed-off-by: Ingo Molnar 
Signed-off-by: Arjan van de Ven 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] let MAGIC_SYSRQ no longer depend on DEBUG_KERNEL

2006-01-10T16:02:02+00:00

I know several people using MAGIC_SYSRQ not for kernel debugging but for
trying to do a halfway normal shutdown in case of problems.

Since there's no technical reason why MAGIC_SYSRQ would have to depend on
DEBUG_KERNEL, I'm therefore suggesting to drop this dependency.

Signed-off-by: Adrian Bunk 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds