- 26 Sep, 2006 40 commits
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Rusty Russell authored
Parsing generic pgtable.h in assembler is simply crazy. None of this file is needed in assembler code, and C inline functions and structures routine break one or more different compiles. Signed-off-by:
Zachary Amsden <zach@vmware.com> Signed-off-by:
Rusty Russell <rusty@rustcorp.com.au> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Dave Hansen authored
The current VMSPLIT Kconfig option is disabled whenever highmem is on. This is a bit screwy because the people who need to change VMSPLIT the most tend to be the ones with highmem and constrained lowmem. So, remove the highmem dependency. But, re-include the dependency for the "full 1GB of lowmem" option. You can't have the full 1GB of lowmem and highmem because of the need for the vmalloc(), kmap(), etc... areas. I thought there would be at least a bit of tweaking to do to get it to work, but everything seems OK. Boot tested on a 4GB x86 machine, and a 12GB 3-node NUMA-Q: elm3b82:~# cat /proc/meminfo MemTotal: 3695412 kB MemFree: 3659540 kB ... LowTotal: 2909008 kB LowFree: 2892324 kB ... elm3b82:~# zgrep PAE /proc/config.gz CONFIG_X86_PAE=y larry:~# cat /proc/meminfo MemTotal: 11845900 kB MemFree: 11786748 kB ... LowTotal: 2855180 kB LowFree: 2830092 kB Signed-off-by:
Dave Hansen <haveblue@us.ibm.com> Signed-off-by:
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Ian Campbell authored
I've come across some problems with the assembly version of the ELFNOTE macro currently in -mm. (in x86-put-note-sections-into-a-pt_note-segment-in-vmlinux.patch) The first is that older gas does not support :varargs in .macro definitions (in my testing 2.17 does while 2.15 does not, I don't know when it became supported). The Changes file says binutils >= 2.12 so I think we need to avoid using it. There are no other uses in mainline or -mm. Old gas appears to just ignore it so you get "too many arguments" type errors. Secondly it seems that passing strings as arguments to assembler macros is broken without varargs. It looks like they get unquoted or each character is treated as a separate argument or something and this causes all manner of grief. I think this is because of the use of -traditional when compiling assembly files. Therefore I have translated the assembler macro into a pre-processor macro. I added the desctype as a separate argument instead of including it with the descdata as the previous version did since -traditional means the ELFNOTE definition after the #else needs to have the same number of arguments (I think so anyway, the -traditional CPP semantics are pretty fscking strange!). With this patch I am able to define elfnotes in assembly like this with both old and new assemblers. ELFNOTE(Xen, XEN_ELFNOTE_GUEST_OS, .asciz, "linux") ELFNOTE(Xen, XEN_ELFNOTE_GUEST_VERSION, .asciz, "2.6") ELFNOTE(Xen, XEN_ELFNOTE_XEN_VERSION, .asciz, "xen-3.0") ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE, .long, __PAGE_OFFSET) Which seems reasonable enough. Signed-off-by:
Ian Campbell <ian.campbell@xensource.com> Acked-by:
Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by:
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Jeremy Fitzhardinge authored
This patch will pack any .note.* section into a PT_NOTE segment in the output file. To do this, we tell ld that we need a PT_NOTE segment. This requires us to start explicitly mapping sections to segments, so we also need to explicitly create PT_LOAD segments for text and data, and map the sections to them appropriately. Fortunately, each section will default to its previous section's segment, so it doesn't take many changes to vmlinux.lds.S. This only changes i386 for now, but I presume the corresponding changes for other architectures will be as simple. This change also adds <linux/elfnote.h>, which defines C and Assembler macros for actually creating ELF notes. Signed-off-by:
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Zachary Amsden authored
Add a boot parameter to reserve high linear address space for hypervisors. This is necessary to allow dynamically loaded hypervisor modules, which might not happen until userspace is already running, and also provides a useful tool to benchmark the performance impact of reduced lowmem address space. Signed-off-by:
Chris Wright <chrisw@sous-sol.org> Signed-off-by:
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Jeremy Fitzhardinge authored
Make __FIXADDR_TOP a variable, so that it can be set to not get in the way of address space a hypervisor may want to reserve. Original patch by Gerd Hoffmann <kraxel@suse.de> Signed-off-by:
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Rusty Russell authored
It's a little neater, and also means only one place to patch for paravirtualization. Signed-off-by:
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Chris Wright authored
Add "always lock'd" implementations of set_bit, clear_bit and change_bit and the corresponding test_and_ functions. Also add "always lock'd" implementation of cmpxchg. These give guaranteed strong synchronisation and are required for non-SMP kernels running on an SMP hypervisor. Signed-off-by:
Ian Pratt <ian.pratt@xensource.com> Signed-off-by:
Christian Limpach <Christian.Limpach@cl.cam.ac.uk> Signed-off-by:
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Rusty Russell authored
arch/i386/kernel/reboot.c defines its own struct to describe an ldt entry: it should use struct Xgt_desc_struct (currently load_ldt is a macro, so doesn't complain: paravirt patches make it warn). Signed-off-by:
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Neil Horman authored
Clean up module initalization for apm.c. I had started by auditing for proper return code checks in misc_register, but I found that in the event of an initalization failure, a proc file and a kernel thread were left hanging out. this patch properly cleans up those loose ends on any initalization failure. Signed-off-by:
Neil Horman <nhorman@tuxdriver.com> Acked-by:
Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by:
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Rolf Eike Beer authored
Signed-off-by:
Rolf Eike Beer <eike-kernel@sf-tec.de> Signed-off-by:
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Chuck Ebbert authored
show_registers() tries to dump failing code starting 43 bytes before the offending instruction, but this address can be bad, for example in a device driver where the failing instruction is less than 43 bytes from the start of the driver's code. When that happens, try to dump code starting at the failing instruction instead of printing no code at all. Signed-off-by:
Chuck Ebbert <76306.1226@compuserve.com> Cc: Andi Kleen <ak@muc.de> Cc: Keith Owens <kaos@ocs.com.au> Signed-off-by:
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Clemens Ladisch authored
To prevent the emulated RTC timer from stopping when interrupts are delayed for too long, disable interrupts around all of the register initialization, and check that the interrupt handler did not schedule the next interrupt in the past. Signed-off-by:
Clemens Ladisch <clemens@ladisch.de> Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Cc: Andi Kleen <ak@muc.de> Cc: Vojtech Pavlik <vojtech@suse.cz> Cc: Robert Picco <Robert.Picco@hp.com> Signed-off-by:
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Haavard Skinnemoen authored
FRegister a platform device for the AT49BV6416 NOR flash chip on the ATSTK1000 development board for use by the physmap MTD driver. The SMC timings are set up before the platform device is registered so that no board-specific mapping driver is necessary. Signed-off-by:
Haavard Skinnemoen <hskinnemoen@atmel.com> Cc: David Woodhouse <dwmw2@infradead.org> Signed-off-by:
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Haavard Skinnemoen authored
This patchset adds the necessary drivers and infrastructure to access the external flash on the ATSTK1000 board through the MTD subsystem. With this stuff in place, it will be possible to use a jffs2 filesystem stored in the external flash as a root filesystem. It might also be possible to update the boot loader if you drop the write protection of partition 0. As suggested by David Woodhouse, I reworked the patches to use the physmap driver instead of introducing a separate mapping driver for the ATSTK1000. I've also cleaned up the hsmc header by removing useless comments and converting spaces to tabs (my headerfile generator needs some work.) Unfortunately, I couldn't unlock the flash in fixup_use_atmel_lock because the erase regions hadn't been set up yet, so I had to do it from cfi_amdstd_setup instead. This patch: This adds a simple API for configuring the static memory controller along with an implementation for the Atmel HSMC. Signed-off-by:
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Haavard Skinnemoen authored
This adds support for the Atmel AVR32 architecture as well as the AT32AP7000 CPU and the AT32STK1000 development board. AVR32 is a new high-performance 32-bit RISC microprocessor core, designed for cost-sensitive embedded applications, with particular emphasis on low power consumption and high code density. The AVR32 architecture is not binary compatible with earlier 8-bit AVR architectures. The AVR32 architecture, including the instruction set, is described by the AVR32 Architecture Manual, available from http://www.atmel.com/dyn/resources/prod_documents/doc32000.pdf The Atmel AT32AP7000 is the first CPU implementing the AVR32 architecture. It features a 7-stage pipeline, 16KB instruction and data caches and a full Memory Management Unit. It also comes with a large set of integrated peripherals, many of which are shared with the AT91 ARM-based controllers from Atmel. Full data sheet is available from http://www.atmel.com/dyn/resources/prod_documents/doc32003.pdf while the CPU core implementation including caches and MMU is documented by the AVR32 AP Technical Reference, available from http://www.atmel.com/dyn/resources/prod_documents/doc32001.pdf Information about the AT32STK1000 development board can be found at http://www.atmel.com/dyn/products/tools_card.asp?tool_id=3918 including a BSP CD image with an earlier version of this patch, development tools (binaries and source/patches) and a root filesystem image suitable for booting from SD card. Alternatively, there's a preliminary "getting started" guide available at http://avr32linux.org/twiki/bin/view/Main/GettingStarted which provides links to the sources and patches you will need in order to set up a cross-compiling environment for avr32-linux. This patch, as well as the other patches included with the BSP and the toolchain patches, is actively supported by Atmel Corporation. [dmccr@us.ibm.com: Fix more pxx_page macro locations] [bunk@stusta.de: fix `make defconfig'] Signed-off-by:
Adrian Bunk <bunk@stusta.de> Signed-off-by:
Dave McCracken <dmccr@us.ibm.com> Signed-off-by:
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Ralf Baechle authored
The third argument of au1xxx_dbdma_chan_alloc's callback function is not used anywhere. Signed-off-by:
Ralf Baechle <ralf@linux-mips.org> Cc: David Howells <dhowells@redhat.com> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by:
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David Howells authored
Optimise ffs(x) by using fls(x & x - 1) which we optimise to use the SCAN instruction. Signed-off-by:
David Howells <dhowells@redhat.com> Signed-off-by:
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David Howells authored
Implement fls64() for FRV without recource to conditional jumps. Signed-off-by:
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David Howells authored
Fix FRV fls() to handle bit 31 being set correctly (it should return 32 not 0). Signed-off-by:
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David Howells authored
Permit __do_IRQ() to be dispensed with based on a configuration option. Signed-off-by:
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David Howells authored
Improve FRV's use of generic IRQ handling: (*) Use generic_handle_irq() rather than __do_IRQ() as the latter is obsolete. (*) Don't implement enable() and disable() ops as these will fall back to using unmask() and mask(). (*) Provide mask_ack() functions to avoid a call each to mask() and ack(). (*) Make the cascade handlers always return IRQ_HANDLED. (*) Implement the mask() and unmask() functions in the same order as they're listed in the ops table. Signed-off-by: -
David Howells authored
Make the FRV arch use the generic IRQ code rather than having its own routines for doing so. Signed-off-by:
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Andrew Morton authored
As David Howells <dhowells@redhat.com> points out, binfmt_elf sometimes uses off_t, sometimes uses loff_t. Use loff_t throughout. Signed-off-by:
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Stephen Smalley authored
Take tty_mutex when accessing ->signal->tty in selinux code. Noted by Alan Cox. Longer term, we are looking at refactoring the code to provide better encapsulation of the tty layer, but this is a simple fix that addresses the immediate bug. Signed-off-by:
Stephen Smalley <sds@tycho.nsa.gov> Acked-by:
Alan Cox <alan@redhat.com> Acked-by:
James Morris <jmorris@namei.org> Signed-off-by:
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Eric Paris authored
This patch converts the semaphore in the superblock security struct to a mutex. No locking changes or other code changes are done. Signed-off-by:
Eric Paris <eparis@redhat.com> Acked-by:
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Eric Paris authored
This patch converts the remaining isec->sem into a mutex. Very similar locking is provided as before only in the faster smaller mutex rather than a semaphore. An out_unlock path is introduced rather than the conditional unlocking found in the original code. Signed-off-by:
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Eric Paris authored
inode_security_set_sid is only called by security_inode_init_security, which is called when a new file is being created and needs to have its incore security state initialized and its security xattr set. This helper used to be called in other places in the past, but now only has the one. So this patch rolls inode_security_set_sid directly back into security_inode_init_security. There also is no need to hold the isec->sem while doing this, as the inode is not available to other threads at this point in time. Signed-off-by:
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Darrel Goeddel authored
Introduces support for policy version 21. This version of the binary kernel policy allows for defining range transitions on security classes other than the process security class. As always, backwards compatibility for older formats is retained. The security class is read in as specified when using the new format, while the "process" security class is assumed when using an older policy format. Signed-off-by:
Darrel Goeddel <dgoeddel@trustedcs.com> Signed-off-by:
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Stephen Smalley authored
Enable configuration of SELinux maximum supported policy version to support legacy userland (init) that does not gracefully handle kernels that support newer policy versions two or more beyond the installed policy, as in FC3 and FC4. [bunk@stusta.de: improve Kconfig help text] Signed-off-by:
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Stephen Smalley authored
Replace ctxid with sid in selinux_audit_rule_match interface for consistency with other interfaces. Signed-off-by:
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Stephen Smalley authored
Rename selinux_ctxid_to_string to selinux_sid_to_string to be consistent with other interfaces. Signed-off-by:
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Stephen Smalley authored
Eliminate selinux_task_ctxid since it duplicates selinux_task_get_sid. Signed-off-by:
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Christoph Lameter authored
There are many places where we need to determine the node of a zone. Currently we use a difficult to read sequence of pointer dereferencing. Put that into an inline function and use throughout VM. Maybe we can find a way to optimize the lookup in the future. Signed-off-by:
Christoph Lameter <clameter@sgi.com> Signed-off-by:
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Christoph Lameter authored
I found two location in hugetlb.c where we chase pointer instead of using page_to_nid(). Page_to_nid is more effective and can get the node directly from page flags. Signed-off-by:
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Ram Gupta authored
Update the comments for __oom_kill_task() to reflect the code changes. Signed-off-by:
Ram Gupta <r.gupta@astronautics.com> Signed-off-by:
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Christoph Lameter authored
Minor performance fix. If we reclaimed enough slab pages from a zone then we can avoid going off node with the current allocation. Take care of updating nr_reclaimed when reclaiming from the slab. Signed-off-by:
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Christoph Lameter authored
Currently one can enable slab reclaim by setting an explicit option in /proc/sys/vm/zone_reclaim_mode. Slab reclaim is then used as a final option if the freeing of unmapped file backed pages is not enough to free enough pages to allow a local allocation. However, that means that the slab can grow excessively and that most memory of a node may be used by slabs. We have had a case where a machine with 46GB of memory was using 40-42GB for slab. Zone reclaim was effective in dealing with pagecache pages. However, slab reclaim was only done during global reclaim (which is a bit rare on NUMA systems). This patch implements slab reclaim during zone reclaim. Zone reclaim occurs if there is a danger of an off node allocation. At that point we 1. Shrink the per node page cache if the number of pagecache pages is more than min_unmapped_ratio percent of pages in a zone. 2. Shrink the slab cache if the number of the nodes reclaimable slab pages (patch depends on earlier one that implements that counter) are more than min_slab_ratio (a new /proc/sys/vm tunable). The shrinking of the slab cache is a bit problematic since it is not node specific. So we simply calculate what point in the slab we want to reach (current per node slab use minus the number of pages that neeed to be allocated) and then repeately run the global reclaim until that is unsuccessful or we have reached the limit. I hope we will have zone based slab reclaim at some point which will make that easier. The default for the min_slab_ratio is 5% Also remove the slab option from /proc/sys/vm/zone_reclaim_mode. [akpm@osdl.org: cleanups] Signed-off-by:
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Christoph Lameter authored
Remove the atomic counter for slab_reclaim_pages and replace the counter and NR_SLAB with two ZVC counter that account for unreclaimable and reclaimable slab pages: NR_SLAB_RECLAIMABLE and NR_SLAB_UNRECLAIMABLE. Change the check in vmscan.c to refer to to NR_SLAB_RECLAIMABLE. The intend seems to be to check for slab pages that could be freed. Signed-off-by:
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Christoph Lameter authored
*_pages is a better description of the role of the variable. Signed-off-by:
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