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  1. 09 5月, 2006 2 次提交
    • A
      [PATCH] x86_64: Avoid EBDA area in early boot allocator · ac71d12c
      由 Andi Kleen 提交于 
      Based on analysis&patch from Robert Hentosch

Observed on a Dell PE6850 with 16GB

The problem occurs very early on, when the kernel allocates space for the
temporary memory map called bootmap. The bootmap overlaps the EBDA region.
EBDA region is not historically reserved in the e820 mapping. When the
bootmap is freed it marks the EBDA region as usable.

If you notice in setup.c there is already code to work around the EBDA
in reserve_ebda_region(), this check however occurs after the bootmap
is allocated and doesn't prevent the bootmap from using this range.

AK: I redid the original patch. Thanks also to Jan Beulich for
spotting some mistakes.

Cc: Robert_Hentosch@dell.com
Cc: jbeulich@novell.com
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      ac71d12c
    • K
      [PATCH] x86_64: avoid IRQ0 ioapic pin collision · e0c1e9bf
      由 Kimball Murray 提交于 
      The patch addresses a problem with ACPI SCI interrupt entry, which gets
re-used, and the IRQ is assigned to another unrelated device.  The patch
corrects the code such that SCI IRQ is skipped and duplicate entry is
avoided.  Second issue came up with VIA chipset, the problem was caused by
original patch assigning IRQs starting 16 and up.  The VIA chipset uses
4-bit IRQ register for internal interrupt routing, and therefore cannot
handle IRQ numbers assigned to its devices.  The patch corrects this
problem by allowing PCI IRQs below 16.

Cc: len.brown@intel.com

Signed-off by: Natalie Protasevich <Natalie.Protasevich@unisys.com>
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      e0c1e9bf
  3. 08 5月, 2006 3 次提交
  5. 07 5月, 2006 2 次提交
  7. 06 5月, 2006 4 次提交
  9. 05 5月, 2006 1 次提交
  11. 04 5月, 2006 7 次提交
  13. 03 5月, 2006 4 次提交
  15. 02 5月, 2006 9 次提交
    • J
      [PATCH] vmsplice: restrict stealing a little more · 330ab716
      由 Jens Axboe 提交于 
      Apply the same rules as the anon pipe pages, only allow stealing
if no one else is using the page.
Signed-off-by: NJens Axboe <axboe@suse.de>
      330ab716
    • J
      [PATCH] splice: fix page LRU accounting · a893b99b
      由 Jens Axboe 提交于 
      Currently we rely on the PIPE_BUF_FLAG_LRU flag being set correctly
to know whether we need to fiddle with page LRU state after stealing it,
however for some origins we just don't know if the page is on the LRU
list or not.

So remove PIPE_BUF_FLAG_LRU and do this check/add manually in pipe_to_file()
instead.
Signed-off-by: NJens Axboe <axboe@suse.de>
      a893b99b
    • P
      [NETFILTER] x_tables: fix compat related crash on non-x86 · 46c5ea3c
      由 Patrick McHardy 提交于 
      When iptables userspace adds an ipt_standard_target, it calculates the size
of the entire entry as:

sizeof(struct ipt_entry) + XT_ALIGN(sizeof(struct ipt_standard_target))

ipt_standard_target looks like this:

  struct xt_standard_target
  {
        struct xt_entry_target target;
        int verdict;
  };

xt_entry_target contains a pointer, so when compiled for 64 bit the
structure gets an extra 4 byte of padding at the end. On 32 bit
architectures where iptables aligns to 8 byte it will also have 4
byte padding at the end because it is only 36 bytes large.

The compat_ipt_standard_fn in the kernel adjusts the offsets by

  sizeof(struct ipt_standard_target) - sizeof(struct compat_ipt_standard_target),

which will always result in 4, even if the structure from userspace
was already padded to a multiple of 8. On x86 this works out by
accident because userspace only aligns to 4, on all other
architectures this is broken and causes incorrect adjustments to
the size and following offsets.

Thanks to Linus for lots of debugging help and testing.
Signed-off-by: NPatrick McHardy <kaber@trash.net>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      46c5ea3c
    • J
      [PATCH] powerpc: cell: Add numa id to struct spu · 8261aa60
      由 Jeremy Kerr 提交于 
      Add an nid member to the spu structure, and store the numa id of the spu there
on creation.
Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      8261aa60
    • J
      [PATCH] powerpc: Allow devices to register with numa topology · 953039c8
      由 Jeremy Kerr 提交于 
      Change of_node_to_nid() to traverse the device tree, looking for a numa id.
Cell uses this to assign ids to SPUs, which are children of the CPU node.
Existing users of of_node_to_nid() are altered to use of_node_to_nid_single(),
which doesn't do the traversal.

Export an attach_sysdev_to_node() function, allowing system devices (eg.
SPUs) to link themselves into the numa topology in sysfs.
Signed-off-by: NArnd Bergmann <arnd.bergmann@de.ibm.com>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      953039c8
    • J
      [PATCH] vmsplice: allow user to pass in gift pages · 7afa6fd0
      由 Jens Axboe 提交于 
      If SPLICE_F_GIFT is set, the user is basically giving this pages away to
the kernel. That means we can steal them for eg page cache uses instead
of copying it.

The data must be properly page aligned and also a multiple of the page size
in length.
Signed-off-by: NJens Axboe <axboe@suse.de>
      7afa6fd0
    • J
      [PATCH] pipe: enable atomic copying of pipe data to/from user space · f6762b7a
      由 Jens Axboe 提交于 
      The pipe ->map() method uses kmap() to virtually map the pages, which
is both slow and has known scalability issues on SMP. This patch enables
atomic copying of pipe pages, by pre-faulting data and using kmap_atomic()
instead.

lmbench bw_pipe and lat_pipe measurements agree this is a Good Thing. Here
are results from that on a UP machine with highmem (1.5GiB of RAM), running
first a UP kernel, SMP kernel, and SMP kernel patched.

Vanilla-UP:
Pipe bandwidth: 1622.28 MB/sec
Pipe bandwidth: 1610.59 MB/sec
Pipe bandwidth: 1608.30 MB/sec
Pipe latency: 7.3275 microseconds
Pipe latency: 7.2995 microseconds
Pipe latency: 7.3097 microseconds

Vanilla-SMP:
Pipe bandwidth: 1382.19 MB/sec
Pipe bandwidth: 1317.27 MB/sec
Pipe bandwidth: 1355.61 MB/sec
Pipe latency: 9.6402 microseconds
Pipe latency: 9.6696 microseconds
Pipe latency: 9.6153 microseconds

Patched-SMP:
Pipe bandwidth: 1578.70 MB/sec
Pipe bandwidth: 1579.95 MB/sec
Pipe bandwidth: 1578.63 MB/sec
Pipe latency: 9.1654 microseconds
Pipe latency: 9.2266 microseconds
Pipe latency: 9.1527 microseconds
Signed-off-by: NJens Axboe <axboe@suse.de>
      f6762b7a
    • J
      [PATCH] pipe: introduce ->pin() buffer operation · f84d7519
      由 Jens Axboe 提交于 
      The ->map() function is really expensive on highmem machines right now,
since it has to use the slower kmap() instead of kmap_atomic(). Splice
rarely needs to access the virtual address of a page, so it's a waste
of time doing it.

Introduce ->pin() to take over the responsibility of making sure the
page data is valid. ->map() is then reduced to just kmap(). That way we
can also share a most of the pipe buffer ops between pipe.c and splice.c
Signed-off-by: NJens Axboe <axboe@suse.de>
      f84d7519
    • J
      [PATCH] splice: fix bugs in pipe_to_file() · 0568b409
      由 Jens Axboe 提交于 
      Found by Oleg Nesterov <oleg@tv-sign.ru>, fixed by me.

- Only allow full pages to go to the page cache.
- Check page != buf->page instead of using PIPE_BUF_FLAG_STOLEN.
- Remember to clear 'stolen' if add_to_page_cache() fails.

And as a cleanup on that:

- Make the bottom fall-through logic a little less convoluted. Also make
  the steal path hold an extra reference to the page, so we don't have
  to differentiate between stolen and non-stolen at the end.
Signed-off-by: NJens Axboe <axboe@suse.de>
      0568b409
  17. 01 5月, 2006 8 次提交
    • S
      [PATCH] Rework of IPC auditing · 073115d6
      由 Steve Grubb 提交于 
      1) The audit_ipc_perms() function has been split into two different
functions:
        - audit_ipc_obj()
        - audit_ipc_set_perm()

There's a key shift here...  The audit_ipc_obj() collects the uid, gid,
mode, and SElinux context label of the current ipc object.  This
audit_ipc_obj() hook is now found in several places.  Most notably, it
is hooked in ipcperms(), which is called in various places around the
ipc code permforming a MAC check.  Additionally there are several places
where *checkid() is used to validate that an operation is being
performed on a valid object while not necessarily having a nearby
ipcperms() call.  In these locations, audit_ipc_obj() is called to
ensure that the information is captured by the audit system.

The audit_set_new_perm() function is called any time the permissions on
the ipc object changes.  In this case, the NEW permissions are recorded
(and note that an audit_ipc_obj() call exists just a few lines before
each instance).

2) Support for an AUDIT_IPC_SET_PERM audit message type.  This allows
for separate auxiliary audit records for normal operations on an IPC
object and permissions changes.  Note that the same struct
audit_aux_data_ipcctl is used and populated, however there are separate
audit_log_format statements based on the type of the message.  Finally,
the AUDIT_IPC block of code in audit_free_aux() was extended to handle
aux messages of this new type.  No more mem leaks I hope ;-)
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      073115d6
    • S
      [PATCH] More user space subject labels · ce29b682
      由 Steve Grubb 提交于 
      Hi,

The patch below builds upon the patch sent earlier and adds subject label to
all audit events generated via the netlink interface. It also cleans up a few
other minor things.
Signed-off-by: NSteve Grubb <sgrubb@redhat.com>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      ce29b682
    • S
      [PATCH] Reworked patch for labels on user space messages · e7c34970
      由 Steve Grubb 提交于 
      The below patch should be applied after the inode and ipc sid patches.
This patch is a reworking of Tim's patch that has been updated to match
the inode and ipc patches since its similar.

[updated:
>  Stephen Smalley also wanted to change a variable from isec to tsec in the
>  user sid patch.                                                              ]
Signed-off-by: NSteve Grubb <sgrubb@redhat.com>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      e7c34970
    • S
      [PATCH] change lspp ipc auditing · 9c7aa6aa
      由 Steve Grubb 提交于 
      Hi,

The patch below converts IPC auditing to collect sid's and convert to context
string only if it needs to output an audit record. This patch depends on the
inode audit change patch already being applied.
Signed-off-by: NSteve Grubb <sgrubb@redhat.com>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      9c7aa6aa
    • S
      [PATCH] audit inode patch · 1b50eed9
      由 Steve Grubb 提交于 
      Previously, we were gathering the context instead of the sid. Now in this patch,
we gather just the sid and convert to context only if an audit event is being
output.

This patch brings the performance hit from 146% down to 23%
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      1b50eed9
    • D
      [PATCH] support for context based audit filtering · 376bd9cb
      由 Darrel Goeddel 提交于 
      The following patch provides selinux interfaces that will allow the audit
system to perform filtering based on the process context (user, role, type,
sensitivity, and clearance).  These interfaces will allow the selinux
module to perform efficient matches based on lower level selinux constructs,
rather than relying on context retrievals and string comparisons within
the audit module.  It also allows for dominance checks on the mls portion
of the contexts that are impossible with only string comparisons.
Signed-off-by: NDarrel Goeddel <dgoeddel@trustedcs.com>
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      376bd9cb
    • A
      [PATCH] drop task argument of audit_syscall_{entry,exit} · 5411be59
      由 Al Viro 提交于 
      ... it's always current, and that's a good thing - allows simpler locking.
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      5411be59
    • D
      [SPARC64]: Kill __flush_tlb_page() prototype. · 1241140f
      由 David S. Miller 提交于 
      This function no longer exists.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      1241140f