- 01 Feb, 2006 40 commits
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Eric W. Biederman authored
While looking in the code I discovered that alpha has fallen behind because it doesn't use sys_getppid. The problem is that it doesn't follow the task struct to the task_group_leader. Acked-by:
Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Mark Lord authored
Enable selection of different user/kernel VM splits for i386, including an optimized mode for 1GB physical RAM, which gives the kernel a direct (non HIGHMEM) mapping to the entire 1GB rather than just the first 896MB. There is a similarly a similarly optimized mode for machines with exactly 2GB of physical RAM. This can speed up the kernel by avoiding having to create/destroy temporary HIGHMEM mappings, and by not having to include HIGHMEM support at all on such machines. The flip side is that there's less virtual addressing left for userspace in these alternatives, and some binary-only kernel modules may misbehave unless rebuilt with the same VMSPLIT option as the main kernel image. Original idea/patch from Jens Axboe, modified based on suggestions from Linus et al. Signed-off-by:
Mark Lord <mlord@pobox.com> Signed-off-by:
Jens Axboe <axboe@suse.de> Signed-off-by:
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Alexey Dobriyan authored
It uses EXPORT_SYMBOL. arch/sh64/kernel/time.c:254: warning: type defaults to `int' in declaration of `EXPORT_SYMBOL' arch/sh64/kernel/time.c:254: warning: parameter names (without types) in function declaration arch/sh64/kernel/time.c:254: warning: data definition has no type or storage class Signed-off-by:
Alexey Dobriyan <adobriyan@gmail.com> Cc: Paul Mundt <lethal@linux-sh.org> Signed-off-by:
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Paul Mundt authored
As reported by Russell King, sh and sh64 currently have bogus definitions for TIOCGICOUNT, particularly referencing a kernel only structure. Switch to using a sensible ioctl value. Signed-off-by:
Paul Mundt <lethal@linux-sh.org> Signed-off-by:
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Paul Mundt authored
machine_halt() managed to trigger the soft lockup detection due to not disabling interrupts before going to sleep, so correct that. machine_power_off() should be using pm_power_off, which lets us drop the board-specific hacks from here. Signed-off-by:
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Paul Mundt authored
This should have been part of the timer framework support that was merged earlier, but looks to have been accidentally omitted. Signed-off-by:
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Paul Mundt authored
A couple of updates for the sh-sci serial driver: - Update for clock framework on sh. - Fix a compile error introduced by some h8300 changes. - Add SH7770/SH7780 subtype support. Signed-off-by:
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Paul Mundt authored
Trivial patch updating the voyagergx cchip code to reference a platform device instead, now that the dma mask is taken care of. Given this, there's no longer any reason to drag around the SH-bus code, so kill that off entirely. Signed-off-by:
Manuel Lauss <mano@roarinelk.homelinux.net> Signed-off-by:
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Paul Mundt authored
Clean up some of the subtype IRQ definitions for IPR IRQ, and consolidate the make_ipr_irq() definitions by dropping maskpos. SH-4A was the only thing interested in the maskpos, and this should be handled through INTC2 rather than IPR. Signed-off-by:
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Paul Mundt authored
Trivial cleanup of the unknown machine type for some of the recent machvec changes. Signed-off-by:
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Paul Mundt authored
Now that the clock framework changes have been integrated, the manual clock accounting that was done in sh_cpuinfo can be dropped. Also correct a bug with running past the end of the CPU flags when there's a mismatch between the added flags and printed ones. Signed-off-by:
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Paul Mundt authored
Currently entry.S is home to these definitions, so we move them somewhere more sensible. IPR IRQ handling depends on being to read from INTEVT. Signed-off-by:
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Paul Mundt authored
Pretty much every subtype does this now anyways, and as we depend on it in a few places being set to something sensible quite early on, it's better for a new subtype to simply set a sensible default. Signed-off-by:
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Paul Mundt authored
A few trivial updates for the microdev board support code: - Update for __IO_PREFIX changes. - Consolidate headers into a single microdev.h. - Update the microdev_defconfig. - Add init values for the S1D13806 used by s1d13xxxfb. Signed-off-by:
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Heiko Carstens authored
Better save the sigmask instead of throwing it away so it can be restored. Signed-off-by:
Heiko Carstens <heiko.carstens@de.ibm.com> Acked-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by:
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Olaf Hering authored
Prodive a MODALIAS= enviroment variable for devices on the mac-io bus. Change the buffer length counter to not waste memory by advancing the pointer for the next string too far. Tested on an ibook1 with modular pmac_zilog. Signed-off-by:
Olaf Hering <olh@suse.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by:
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Albert Herranz authored
- kexec.h is included from assembly code, thus C code must be properly protected. - (embedded) ppc32 systems use machine_kexec_simple whose declaration vanished during a recent powerpc merge change. Signed-off-by:
Albert Herranz <albert_herranz@yahoo.es> Cc: <fastboot@osdl.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by:
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Stephen Smalley authored
Remove the SELinux security structure magic number fields and tests, along with some unnecessary tests for NULL security pointers. These fields and tests are leftovers from the early attempts to support SELinux as a loadable module during LSM development. Signed-off-by:
Stephen Smalley <sds@tycho.nsa.gov> Acked-by:
James Morris <jmorris@namei.org> Signed-off-by:
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Stephen Smalley authored
This patch changes the SELinux file_alloc_security function to use GFP_KERNEL rather than GFP_ATOMIC; the use of GFP_ATOMIC appears to be a remnant of when this function was being called with the files_lock spinlock held, and is no longer necessary. Please apply. Signed-off-by:
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Stephen Smalley authored
Fix the SELinux mprotect checks on executable mappings so that they are not re-applied when the mapping is already executable as well as cleaning up the code. This avoids a situation where e.g. an application is prevented from removing PROT_WRITE on an already executable mapping previously authorized via execmem permission due to an execmod denial. Signed-off-by:
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Randy Dunlap authored
mm/slab.c:1522:13: error: incompatible types for operation (&) Signed-off-by:
Randy Dunlap <rdunlap@xenotime.net> Signed-off-by:
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Randy.Dunlap authored
Fix kernel-doc for calculate_slab_order(). Signed-off-by:
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Pekka Enberg authored
Fix kzalloc() and kstrdup() caller report for CONFIG_DEBUG_SLAB. We must pass the caller to __cache_alloc() instead of directly doing __builtin_return_address(0) there; otherwise kzalloc() and kstrdup() are reported as the allocation site instead of the real one. Thanks to Valdis Kletnieks for reporting the problem and Steven Rostedt for the original idea. Signed-off-by:
Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by:
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Andrew Morton authored
Sometimes it's nice to know who's calling. Signed-off-by:
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Pekka Enberg authored
Replace uses of kmem_cache_t with proper struct kmem_cache in mm/slab.c. Signed-off-by:
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Pekka Enberg authored
Rename the ac_data() function to more descriptive cpu_cache_get(). Acked-by:
Manfred Spraul <manfred@colorfullife.com> Signed-off-by:
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Pekka Enberg authored
Introduce virt_to_cache() and virt_to_slab() functions to reduce duplicate code and introduce a proper abstraction should we want to support other kind of mapping for address to slab and cache (eg. for vmalloc() or I/O memory). Acked-by:
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Pekka Enberg authored
From: Manfred Spraul <manfred@colorfullife.com> Reduce the amount of inline functions in slab to the functions that are used in the hot path: - no inline for debug functions - no __always_inline, inline is already __always_inline - remove inline from a few numa support functions. Before: text data bss dec hex filename 13588 752 48 14388 3834 mm/slab.o (defconfig) 16671 2492 48 19211 4b0b mm/slab.o (numa) After: text data bss dec hex filename 13366 752 48 14166 3756 mm/slab.o (defconfig) 16230 2492 48 18770 4952 mm/slab.o (numa) Signed-off-by:
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Matthew Dobson authored
Create two helper functions slab_get_obj() and slab_put_obj() to replace duplicated code in mm/slab.c Signed-off-by:
Matthew Dobson <colpatch@us.ibm.com> Acked-by:
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Matthew Dobson authored
Create a helper function, slab_destroy_objs() which called from slab_destroy(). This makes slab_destroy() smaller and more readable, and moves ifdefs outside the function body. Signed-off-by:
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Steven Rostedt authored
Clean up cache_estimate() in mm/slab.c and improves the algorithm from O(n) to O(1). We first calculate the maximum number of objects a slab can hold after struct slab and kmem_bufctl_t for each object has been given enough space. After that, to respect alignment rules, we decrease the number of objects if necessary. As required padding is at most align-1 and memory of obj_size is at least align, it is always enough to decrease number of objects by one. The optimization was originally made by Balbir Singh with more improvements from Steven Rostedt. Manfred Spraul provider further modifications: no loop at all for the off-slab case and added comments to explain the background. Acked-by:
Balbir Singh <bsingharora@gmail.com> Signed-off-by:
Steven Rostedt <rostedt@goodmis.org> Signed-off-by:
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Steven Rostedt authored
I noticed the code for index_of is a creative way of finding the cache index using the compiler to optimize to a single hard coded number. But I couldn't help noticing that it uses two methods to let you know that someone used it wrong. One is at compile time (the correct way), and the other is at run time (not good). Signed-off-by:
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Christoph Lameter authored
Clean up kmem_cache_alloc_node a bit. Signed-off-by:
Christoph Lameter <clameter@sgi.com> Acked-by:
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Manfred Spraul authored
An object cache has two different object lengths: - the amount of memory available for the user (object size) - the amount of memory allocated internally (buffer size) This patch does some renames to make the code reflect that better. Signed-off-by:
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Christoph Lameter authored
Migrate a page with buffers without requiring writeback This introduces a new address space operation migratepage() that may be used by a filesystem to implement its own version of page migration. A version is provided that migrates buffers attached to pages. Some filesystems (ext2, ext3, xfs) are modified to utilize this feature. The swapper address space operation are modified so that a regular migrate_page() will occur for anonymous pages without writeback (migrate_pages forces every anonymous page to have a swap entry). Signed-off-by:
Mike Kravetz <kravetz@us.ibm.com> Signed-off-by:
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Christoph Lameter authored
Modify policy layer to support direct page migration - Add migrate_pages_to() allowing the migration of a list of pages to a a specified node or to vma with a specific allocation policy in sets of MIGRATE_CHUNK_SIZE pages - Modify do_migrate_pages() to do a staged move of pages from the source nodes to the target nodes. Signed-off-by:
Paul Jackson <pj@sgi.com> Signed-off-by:
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Christoph Lameter authored
Add remove_from_swap remove_from_swap() allows the restoration of the pte entries that existed before page migration occurred for anonymous pages by walking the reverse maps. This reduces swap use and establishes regular pte's without the need for page faults. Signed-off-by:
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Christoph Lameter authored
Add direct migration support with fall back to swap. Direct migration support on top of the swap based page migration facility. This allows the direct migration of anonymous pages and the migration of file backed pages by dropping the associated buffers (requires writeout). Fall back to swap out if necessary. The patch is based on lots of patches from the hotplug project but the code was restructured, documented and simplified as much as possible. Note that an additional patch that defines the migrate_page() method for filesystems is necessary in order to avoid writeback for anonymous and file backed pages. Signed-off-by:
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by:
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Christoph Lameter authored
Check for PageSwapCache after looking up and locking a swap page. The page migration code may change a swap pte to point to a different page under lock_page(). If that happens then the vm must retry the lookup operation in the swap space to find the correct page number. There are a couple of locations in the VM where a lock_page() is done on a swap page. In these locations we need to check afterwards if the page was migrated. If the page was migrated then the old page that was looked up before was freed and no longer has the PageSwapCache bit set. Signed-off-by:
Hirokazu Takahashi <taka@valinux.co.jp> Signed-off-by:
Dave Hansen <haveblue@us.ibm.com> Signed-off-by: Christoph Lameter <clameter@@sgi.com> Signed-off-by:
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Christoph Lameter authored
If large amounts of zone memory are used by empty slabs then zone_reclaim becomes uneffective. This patch shakes the slab a bit. The problem with this patch is that the slab reclaim is not containable to a zone. Thus slab reclaim may affect the whole system and be extremely slow. This also means that we cannot determine how many pages were freed in this zone. Thus we need to go off node for at least one allocation. The functionality is disabled by default. We could modify the shrinkers to take a zone parameter but that would be quite invasive. Better ideas are welcome. Signed-off-by:
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