- 06 Jan, 2006 40 commits
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David Howells authored
The attached patch makes ramfs support shared-writable mmaps by: (1) Attempting to perform a contiguous block allocation to the requested size when truncate attempts to increase the file from zero size, such as happens when: fd = shm_open("/file/on/ramfs", ...): ftruncate(fd, size_requested); addr = mmap(NULL, subsize, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_SHARED, fd, offset); (2) Permitting any shared-writable mapping over any contiguous set of extant pages. get_unmapped_area() will return the address into the actual ramfs pages. The mapping may start anywhere and be of any size, but may not go over the end of file. Multiple mappings may overlap in any way. (3) Not permitting a file to be shrunk if it would truncate any shared mappings (private mappings are copied). Thus this patch provides support for POSIX shared memory on NOMMU kernels, with certain limitations such as there being a large enough block of pages available to support the allocation and it only working on directly mappable filesystems. Signed-off-by:David Howells <dhowells@redhat.com> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Ben Collins authored
Only output the messages about fan speed changes with a verbose=1 module param. Signed-off-by:
Fabio M. Di Nitto <fabbione@ubuntu.com> Signed-off-by:
Ben Collins <bcollins@ubuntu.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
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Peter Korsgaard authored
Commit 3e9e7c1d (ppc32: cleanup AMCC PPC40x eval boards to support U-Boot) broke the kernel for ML300 / EP405. It still compiles as there's a weak definition of the function in misc-embedded.c, but the kernel crashes as the bd_t fixup isn't performed. Signed-off-by:
Peter Korsgaard <jacmet@sunsite.dk> Cc: <stable@kernel.org> Signed-off-by:
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Sylvain Munaut authored
Some custom cards might not need PCI, without this patch, compilation fails. Signed-off-by:
Roger Blofeld <blofeldus@yahoo.com> Signed-off-by:
Sylvain Munaut <tnt@246tNt.com> Signed-off-by:
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Sylvain Munaut authored
We were counting on the bootloader to init some stuff, like get the bus out of reset and enable accesses. Signed-off-by:
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Sylvain Munaut authored
This patch takes care of an errata of the MPC5200 by avoiding 32 bits access in type 1 configuration accesses. All others accesses are still 32 bits wide. It also adds some mb() since the simple out_be(...) are not sufficient in this case. Signed-off-by:
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Sylvain Munaut authored
The mpc52xx_pci_fixup_resources is not only called at init but also when there is a pci hotplug like when a cardbus card is plugged in. So that function is needed after init too. Thanks to Asier Llano Palacios for reporting this. Signed-off-by:
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Sylvain Munaut authored
AFAIK IRQ number 0 is a perfectly valid IRQ number. But it seems there are numerous places where it's considered to be invalid or "no irq" value. Since that value is problematic, the IRQ mapping is changed to not use it. Signed-off-by:
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Sylvain Munaut authored
The current iomapping used MBAR_SIZE for the size argument of io_block_mapping, resulting in a call to setbat with a size argument of 64k which is invalid. This patch correct this and maps the whole 0xf0000000->0xffffffff range so that devices on the local bus are also included in the BAT mapping. Thanks to Bernhard Kuhn from Metrowerks for pointing this out. Signed-off-by:
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Sylvain Munaut authored
Before this patch we were just using the "classic" /dev/ttySx devices. However when another on the system is loaded that uses those (like drivers for serial PCMCIA), that creates a conflict for the minors. Therefore, we now use /dev/ttyPSC[0:5] (note the 0-based numbering !) with some minors we've been assigned in the "Low Density Serial port major" Signed-off-by:
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Sylvain Munaut authored
Signed-off-by:
Wolfgang Denk <wd@denx.de> Signed-off-by:
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Sylvain Munaut authored
That file is a left-over of the 'old' OCP model that should have been erased during the change to platform model but I forgot it ... Signed-off-by:
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Arthur Othieno authored
therm_pm72.c and windfarm_lm75_sensor.c both store the return from i2c_add_driver() but do no further processing on the result. Simply return what i2c_add_driver() did, instead. Signed-off-by:
Arthur Othieno <a.othieno@bluewin.ch> Acked-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
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Otavio Salvador authored
Disable declaration of cpu variable in default_idle function when building non-SMP kernels. Signed-off-by:
Otavio Salvador <otavio@debian.org> Signed-off-by:
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Eugene Surovegin authored
Remove the not needed anymore "jumbo" member from ocp_func_emac_data. Jumbo frame support is handled by PPC4xx EMAC driver internally now. Signed-off-by:
Eugene Surovegin <ebs@ebshome.net> Signed-off-by:
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Adrian Bunk authored
make needlessly global code static Signed-off-by:
Adrian Bunk <bunk@stusta.de> Cc: David Howells <dhowells@redhat.com> Signed-off-by:
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David Howells authored
Remove the key duplication stuff since there's nothing that uses it, no way to get at it and it's awkward to deal with for LSM purposes. Signed-off-by:
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Tobias Klauser authored
Further ARRAY_SIZE cleanups under security/selinux. Signed-off-by:
Tobias Klauser <tklauser@nuerscht.ch> Signed-off-by:
Stephen Smalley <sds@tycho.nsa.gov> Acked-by:
James Morris <jmorris@namei.org> Signed-off-by:
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Nicolas Kaiser authored
Use ARRAY_SIZE macro instead of sizeof(x)/sizeof(x[0]). Signed-off-by:
Nicolas Kaiser <nikai@nikai.net> Signed-off-by:
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Nick Piggin authored
Comment the new locking rules for page_state statistics. Signed-off-by:
Nick Piggin <npiggin@suse.de> Signed-off-by:
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Nick Piggin authored
Optimise page_state manipulations by introducing interrupt unsafe accessors to page_state fields. Callers must provide their own locking (either disable interrupts or not update from interrupt context). Switch over the hot callsites that can easily be moved under interrupts off sections. Signed-off-by:
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Christoph Lameter authored
Several counters already have the need to use 64 atomic variables on 64 bit platforms (see mm_counter_t in sched.h). We have to do ugly ifdefs to fall back to 32 bit atomic on 32 bit platforms. The VM statistics patch that I am working on will also make more extensive use of atomic64. This patch introduces a new type atomic_long_t by providing definitions in asm-generic/atomic.h that works similar to the c "long" type. Its 32 bits on 32 bit platforms and 64 bits on 64 bit platforms. Also cleans up the determination of the mm_counter_t in sched.h. Signed-off-by:
Christoph Lameter <clameter@sgi.com> Signed-off-by:
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Christoph Lameter authored
Give j and r meaningful names. Signed-off-by:
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Christoph Lameter authored
The use k in the inner loop means that the highest zone nr is always used if any zone of a node is populated. This means that the policy zone is not correctly determined on arches that do no use HIGHMEM like ia64. Change the loop to decrement k which also simplifies the BUG_ON. Signed-off-by:
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Christoph Lameter authored
Currently the function to build a zonelist for a BIND policy has the side effect to set the policy_zone. This seems to be a bit strange. policy zone seems to not be initialized elsewhere and therefore 0. Do we police ZONE_DMA if no bind policy has been used yet? This patch moves the determination of the zone to apply policies to into the page allocator. We determine the zone while building the zonelist for nodes. Signed-off-by:
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Christoph Lameter authored
Simplify build_zonelists_node by removing the case statement. Signed-off-by:
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Con Kolivas authored
There are numerous places we check whether a zone is populated or not. Provide a helper function to check for populated zones and convert all checks for zone->present_pages. Signed-off-by:
Con Kolivas <kernel@kolivas.org> Signed-off-by:
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Andrew Morton authored
Cc: Christoph Lameter <clameter@engr.sgi.com> Cc: Rajesh Shah <rajesh.shah@intel.com> Cc: Li Shaohua <shaohua.li@intel.com> Cc: Srivatsa Vaddagiri <vatsa@in.ibm.com> Cc: Ashok Raj <ashok.raj@intel.com> Signed-off-by:
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Andrew Morton authored
Revert a patch which went into 2.6.8-rc1. The changelog for that patch was: The shrink_zone() logic can, under some circumstances, cause far too many pages to be reclaimed. Say, we're scanning at high priority and suddenly hit a large number of reclaimable pages on the LRU. Change things so we bale out when SWAP_CLUSTER_MAX pages have been reclaimed. Problem is, this change caused significant imbalance in inter-zone scan balancing by truncating scans of larger zones. Suppose, for example, ZONE_HIGHMEM is 10x the size of ZONE_NORMAL. The zone balancing algorithm would require that if we're scanning 100 pages of ZONE_HIGHMEM, we should scan 10 pages of ZONE_NORMAL. But this logic will cause the scanning of ZONE_HIGHMEM to bale out after only 32 pages are reclaimed. Thus effectively causing smaller zones to be scanned relatively harder than large ones. Now I need to remember what the workload was which caused me to write this patch originally, then fix it up in a different way... Signed-off-by:
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Nick Piggin authored
This atomic operation is superfluous: the pte will be added with the referenced bit set, and the page will be referenced through this mapping after the page fault handler returns anyway. Signed-off-by:
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Nick Piggin authored
Optimise rmap functions by minimising atomic operations when we know there will be no concurrent modifications. Signed-off-by:
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Nick Piggin authored
Cut down size slightly by not passing bad_page the function name (it should be able to be determined by dump_stack()). And cut down the number of printks in bad_page. Also, cut down some branching in the destroy_compound_page path. Signed-off-by:
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Nick Piggin authored
Add dma32 to zone statistics. Also attempt to arrange struct page_state a bit better (visually). Signed-off-by:
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Andrew Morton authored
Remove the last bits of Martin's ill-fated sys_set_zone_reclaim(). Cc: Martin Hicks <mort@wildopensource.com> Signed-off-by:
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Nikita Danilov authored
As find_lock_page() already checks with TestSetPageLocked() that page is locked, there is no need to call lock_page() that will try-lock page again (chances of page being unlocked in between are small). Call __lock_page() directly, this saves one atomic operation. Also, mark truncate-while-slept path as unlikely while we are here. (akpm: ug. But this is actually a common path for normal old read()s against a page which is under readahead I/O so ho-hum.) Signed-off-by:
Nikita Danilov <danilov@gmail.com> Signed-off-by:
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David Howells authored
The attached patch cleans up the way the bootmem allocator frees pages. A new function, __free_pages_bootmem(), is provided in mm/page_alloc.c that is called from mm/bootmem.c to turn pages over to the main allocator. All the bits of code to initialise pages (clearing PG_reserved and setting the page count) are moved to here. The checks on page validity are removed, on the assumption that the struct page arrays will have been prepared correctly. Signed-off-by:
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Ravikiran G Thirumalai authored
Patch cleans up the alloc_bootmem fix for swiotlb. Patch removes alloc_bootmem_*_limit api and fixes alloc_boot_*low api to do the right thing -- allocate from low32 memory. Signed-off-by:
Ravikiran Thirumalai <kiran@scalex86.org> Signed-off-by:
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Nick Piggin authored
Small cleanups that does not change generated code with the gcc's I've tested with. Signed-off-by:
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Nick Piggin authored
read_page_state and __get_page_state only traverse online CPUs, which will cause results to fluctuate when CPUs are plugged in or out. Signed-off-by:
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Nick Piggin authored
struct per_cpu_pages.low is useless. Remove it. Signed-off-by:
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