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  1. 26 7月, 2011 4 次提交
  3. 23 7月, 2011 1 次提交
  5. 21 7月, 2011 1 次提交
  7. 28 6月, 2011 1 次提交
  9. 27 5月, 2011 1 次提交
  11. 25 5月, 2011 11 次提交
  13. 24 5月, 2011 1 次提交
  15. 18 5月, 2011 1 次提交
  17. 29 4月, 2011 3 次提交
  19. 15 4月, 2011 2 次提交
  21. 14 4月, 2011 1 次提交
  23. 10 4月, 2011 1 次提交
  25. 31 3月, 2011 1 次提交
  27. 30 3月, 2011 1 次提交
  29. 25 3月, 2011 3 次提交
    • T
      um: Use generic show_interrupts() · df31a0a0
      由 Thomas Gleixner 提交于 
      Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
      df31a0a0
    • T
      um: Convert genirq namespace · 0ebec35f
      由 Thomas Gleixner 提交于 
      Scripted with coccinelle.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
      0ebec35f
    • T
      percpu: Always align percpu output section to PAGE_SIZE · 0415b00d
      由 Tejun Heo 提交于 
      Percpu allocator honors alignment request upto PAGE_SIZE and both the
percpu addresses in the percpu address space and the translated kernel
addresses should be aligned accordingly.  The calculation of the
former depends on the alignment of percpu output section in the kernel
image.

The linker script macros PERCPU_VADDR() and PERCPU() are used to
define this output section and the latter takes @align parameter.
Several architectures are using @align smaller than PAGE_SIZE breaking
percpu memory alignment.

This patch removes @align parameter from PERCPU(), renames it to
PERCPU_SECTION() and makes it always align to PAGE_SIZE.  While at it,
add PCPU_SETUP_BUG_ON() checks such that alignment problems are
reliably detected and remove percpu alignment comment recently added
in workqueue.c as the condition would trigger BUG way before reaching
there.

For um, this patch raises the alignment of percpu area.  As the area
is in .init, there shouldn't be any noticeable difference.

This problem was discovered by David Howells while debugging boot
failure on mn10300.
Signed-off-by: NTejun Heo <tj@kernel.org>
Acked-by: NMike Frysinger <vapier@gentoo.org>
Cc: uclinux-dist-devel@blackfin.uclinux.org
Cc: David Howells <dhowells@redhat.com>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: user-mode-linux-devel@lists.sourceforge.net
      0415b00d
  31. 23 3月, 2011 3 次提交
    • R
      um: remove file pointer from ioctl · 8a06dc4d
      由 Richard Weinberger 提交于 
      Commit 6caa76b7 ("tty: now phase out the ioctl file pointer for good")
removed the ioctl file pointer.  User Mode Linux's line driver uses this
ioctl and needs a signature update too.
Signed-off-by: NRichard Weinberger <richard@nod.at>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Greg KH <greg@kroah.com>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      8a06dc4d
    • P
      uml: kernels on {i386,x86_64} produce bad coredumps · 13e165ba
      由 Paul Pluzhnikov 提交于 
      One of our users reported that when a user-level program SIGSEGVs under
UML kernel, the resulting core dump is not very usable.

I have reproduced that with the latest kernel:

  make ARCH=um defconfig; make ARCH=um

Run the resulting kernel, then "inside" run this program:

#include <pthread.h>

void *fn(void *p)
{
 abort();
}

int main()
{
 pthread_t tid;
 pthread_create(&tid, 0, fn, 0);
 pthread_join(tid, 0);
 return 0;
}

Analyze the coredump with GDB. Here is what you'll see:

sudo gdb -q -ex 'set solib-absolute-prefix ../root_fs' -ex 'file ../root_fs/var/tmp/mt-abort' -ex 'core ../root_fs/var/tmp/core.762'
Reading symbols from /usr/local/google/root_fs/var/tmp/mt-abort...done.
[New Thread 763]
[New Thread 762]
Core was generated by `./mt-abort'.
Program terminated with signal 6, Aborted.
#0  0x0000000040255250 in raise () from ../root_fs/lib64/libc.so.6
(gdb) info thread
  2 Thread 762  0x0000000000000000 in ?? ()
* 1 Thread 763  0x0000000040255250 in raise () from ../root_fs/lib64/libc.so.6

Note that thread#2 looks funny.

(gdb) thread 2
[Switching to thread 2 (Thread 762)]#0  0x0000000000000000 in ?? ()
(gdb) info reg
rax            0x0      0
rbx            0x0      0
rcx            0x0      0
rdx            0x0      0
rsi            0x0      0
rdi            0x0      0
rbp            0x0      0x0
rsp            0x0      0x0
r8             0x0      0
r9             0x0      0
r10            0x0      0
r11            0x0      0
r12            0x0      0
r13            0x0      0
r14            0x0      0
r15            0x0      0
rip            0x0      0
eflags         0x0      [ ]
cs             0x0      0
ss             0x0      0
ds             0x0      0
es             0x0      0
fs             0x0      0
gs             0x0      0

Examining the core shows that NT_PRSTATUS notes for all threads other than
the one that crashed are zeroed out.

I believe this is happening because neither ELF_CORE_COPY_TASK_REGS nor
task_pt_regs are defined under ARCH=um, and so elf_core_copy_task_regs()
becomes a no-op.

Attached patch fixes this for SUBARCH={x86_64,i386}.
Signed-off-by: NPaul Pluzhnikov <ppluzhnikov@google.com>
Cc: Jeff Dike <jdike@addtoit.com>
Acked-by: NWANG Cong <xiyou.wangcong@gmail.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      13e165ba
    • E
      mm: NUMA aware alloc_task_struct_node() · 504f52b5
      由 Eric Dumazet 提交于 
      All kthreads being created from a single helper task, they all use memory
from a single node for their kernel stack and task struct.

This patch suite creates kthread_create_on_cpu(), adding a 'cpu' parameter
to parameters already used by kthread_create().

This parameter serves in allocating memory for the new kthread on its
memory node if available.

Users of this new function are : ksoftirqd, kworker, migration, pktgend...

This patch:

Add a node parameter to alloc_task_struct(), and change its name to
alloc_task_struct_node()

This change is needed to allow NUMA aware kthread_create_on_cpu()
Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
Acked-by: NDavid S. Miller <davem@davemloft.net>
Reviewed-by: NAndi Kleen <ak@linux.intel.com>
Acked-by: NRusty Russell <rusty@rustcorp.com.au>
Cc: Tejun Heo <tj@kernel.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: David Howells <dhowells@redhat.com>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      504f52b5
  33. 17 3月, 2011 1 次提交
  35. 14 3月, 2011 1 次提交
    • A
      open-style analog of vfs_path_lookup() · 73d049a4
      由 Al Viro 提交于 
      new function: file_open_root(dentry, mnt, name, flags) opens the file
vfs_path_lookup would arrive to.

Note that name can be empty; in that case the usual requirement that
dentry should be a directory is lifted.

open-coded equivalents switched to it, may_open() got down exactly
one caller and became static.
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      73d049a4
  37. 09 3月, 2011 1 次提交
  39. 01 3月, 2011 1 次提交