- 05 Sep, 2005 40 commits
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Christoph Hellwig authored
GFP flags must be passed as unisgned int __nocast these days, else we'll get tons of sparse warnings in every driver. Signed-off-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Kumar Gala authored
Support for the PCORE board is no longer maintained and thus being removed Signed-off-by:
Kumar Gala <kumar.gala@freescale.com> Signed-off-by:
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Kumar Gala authored
Support for the SPD823TS board is no longer maintained and thus being removed Signed-off-by:
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Kumar Gala authored
Support for the SM850 board is no longer maintained and thus being removed Signed-off-by:
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Kumar Gala authored
Support for the REDWOOD board is no longer maintained and thus being removed Signed-off-by:
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Kumar Gala authored
Support for the RAINIER board is no longer maintained and thus being removed Signed-off-by:
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Kumar Gala authored
Support for the OAK board is no longer maintained and thus being removed Signed-off-by:
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Kumar Gala authored
Support for the MENF1 board is no longer maintained and thus being removed Signed-off-by:
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Kumar Gala authored
Support for the MCPN765 board is no longer maintained and thus being removed Signed-off-by:
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Kumar Gala authored
Support for the K2 board is no longer maintained and thus being removed Signed-off-by:
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Kumar Gala authored
Support for the CEDAR board no longer exists, removing the defconfig for it Signed-off-by:
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Kumar Gala authored
Support for the BEECH board is no longer maintained and thus being removed Signed-off-by:
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Kumar Gala authored
Support for the ASH board is no longer maintained and thus being removed Signed-off-by:
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Kumar Gala authored
Support for the ADIR board is no longer maintained and thus being removed Signed-off-by:
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Adrian Bunk authored
This #define is only used on sparc. Signed-off-by:
Adrian Bunk <bunk@stusta.de> Signed-off-by:
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Stephen Smalley authored
This patch modifies the VFS setxattr, getxattr, and listxattr code to fall back to the security module for security xattrs if the filesystem does not support xattrs natively. This allows security modules to export the incore inode security label information to userspace even if the filesystem does not provide xattr storage, and eliminates the need to individually patch various pseudo filesystem types to provide such access. The patch removes the existing xattr code from devpts and tmpfs as it is then no longer needed. The patch restructures the code flow slightly to reduce duplication between the normal path and the fallback path, but this should only have one user-visible side effect - a program may get -EACCES rather than -EOPNOTSUPP if policy denied access but the filesystem didn't support the operation anyway. Note that the post_setxattr hook call is not needed in the fallback case, as the inode_setsecurity hook call handles the incore inode security state update directly. In contrast, we do call fsnotify in both cases. Signed-off-by:
Stephen Smalley <sds@tycho.nsa.gov> Acked-by:
James Morris <jmorris@namei.org> Signed-off-by:
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Alexey Dobriyan authored
This patch adds endian notations to the SELinux code. Signed-off-by:
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Stephen Smalley authored
This patch improves memory use by SELinux by both reducing the avtab node size and reducing the number of avtab nodes. The memory savings are substantial, e.g. on a 64-bit system after boot, James Morris reported the following data for the targeted and strict policies: #objs objsize kernmem Targeted: Before: 237888 40 9.1MB After: 19968 24 468KB Strict: Before: 571680 40 21.81MB After: 221052 24 5.06MB The improvement in memory use comes at a cost in the speed of security server computations of access vectors, but these computations are only required on AVC cache misses, and performance measurements by James Morris using a number of benchmarks have shown that the change does not cause any significant degradation. Note that a rebuilt policy via an updated policy toolchain (libsepol/checkpolicy) is required in order to gain the full benefits of this patch, although some memory savings benefits are immediately applied even to older policies (in particular, the reduction in avtab node size). Sources for the updated toolchain are presently available from the sourceforge CVS tree (http://sourceforge.net/cvs/?group_id=21266), and tarballs are available from http://www.flux.utah.edu/~sds. Signed-off-by: -
Egry Gabor authored
The 'make update-po-config' creates the .pot file for the default arch. This patch enhances it with all arch. Signed-off-by:
Egry Gabor <gaboregry@t-online.hu> Cc: Arnaldo Carvalho de Melo <acme@conectiva.com.br> Cc: Roman Zippel <zippel@linux-m68k.org> Signed-off-by:
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Egry Gabor authored
The end of line character doesn't exist on end of help in all case, check it first. Signed-off-by:
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Egry Gabor authored
The gettext doesn't handle the {CONFIG}:00000 markers as sources. I added a simple comment prefix for them. Signed-off-by: -
Martin Hicks authored
Add page_state info to the per-node meminfo file in sysfs. This is mostly just for informational purposes. The lack of this information was brought up recently during a discussion regarding pagecache clearing, and I put this patch together to test out one of the suggestions. It seems like interesting info to have, so I'm submitting the patch. Signed-off-by:
Martin Hicks <mort@sgi.com> Signed-off-by:
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Mauricio Lin authored
Add a "smaps" entry to /proc/pid: show howmuch memory is resident in each mapping. People that want to perform a memory consumption analysing can use it mainly if someone needs to figure out which libraries can be reduced for embedded systems. So the new features are the physical size of shared and clean [or dirty]; private and clean [or dirty]. Take a look the example below: # cat /proc/4576/smaps 08048000-080dc000 r-xp /bin/bash Size: 592 KB Rss: 500 KB Shared_Clean: 500 KB Shared_Dirty: 0 KB Private_Clean: 0 KB Private_Dirty: 0 KB 080dc000-080e2000 rw-p /bin/bash Size: 24 KB Rss: 24 KB Shared_Clean: 0 KB Shared_Dirty: 0 KB Private_Clean: 0 KB Private_Dirty: 24 KB 080e2000-08116000 rw-p Size: 208 KB Rss: 208 KB Shared_Clean: 0 KB Shared_Dirty: 0 KB Private_Clean: 0 KB Private_Dirty: 208 KB b7e2b000-b7e34000 r-xp /lib/tls/libnss_files-2.3.2.so Size: 36 KB Rss: 12 KB Shared_Clean: 12 KB Shared_Dirty: 0 KB Private_Clean: 0 KB Private_Dirty: 0 KB ... (Includes a cleanup from "Richard Purdie" <rpurdie@rpsys.net>) From: Torsten Foertsch <torsten.foertsch@gmx.net> show_smap calls first show_map and then prints its additional information to the seq_file. show_map checks if all it has to print fits into the buffer and if yes marks the current vma as written. While that is correct for show_map it is not for show_smap. Here the vma should be marked as written only after the additional information is also written. The attached patch cures the problem. It moves the functionality of the show_map function to a new function show_map_internal that is called with an additional struct mem_size_stats* argument. Then show_map calls show_map_internal with NULL as struct mem_size_stats* whereas show_smap calls it with a real pointer. Now the final if (m->count < m->size) /* vma is copied successfully */ m->version = (vma != get_gate_vma(task))? vma->vm_start: 0; is done only if the whole entry fits into the buffer. Signed-off-by:
Hugh Dickins <hugh@veritas.com> Signed-off-by:
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Manfred Spraul authored
Proposed by and based on a patch from Eric Dumazet <dada1@cosmosbay.com>: This patch removes unnecessary critical section in ksize() function, as cli/sti are rather expensive on modern CPUS. It additionally adds a docbook entry for ksize() and further simplifies the code. Signed-Off-By:
Manfred Spraul <manfred@colorfullife.com> Signed-off-by:
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Eric Dumazet authored
Mostobjects returned by __cache_alloc() will be written by the caller, (but not all callers want to write all the object, but just at the begining) prefetchw() tells the modern CPU to think about the future writes, ie start some memory transactions in advance. Signed-off-by:
Eric Dumazet <dada1@cosmosbay.com> Signed-off-by:
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Zachary Amsden authored
Any architecture that has hardware updated A/D bits that require synchronization against other processors during PTE operations can benefit from doing non-atomic PTE updates during address space destruction. Originally done on i386, now ported to x86_64. Doing a read/write pair instead of an xchg() operation saves the implicit lock, which turns out to be a big win on 32-bit (esp w PAE). Signed-off-by:
Zachary Amsden <zach@vmware.com> Cc: Andi Kleen <ak@muc.de> Signed-off-by:
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Zachary Amsden authored
Add a new accessor for PTEs, which passes the full hint from the mmu_gather struct; this allows architectures with hardware pagetables to optimize away atomic PTE operations when destroying an address space. Removing the locked operation should allow better pipelining of memory access in this loop. I measured an average savings of 30-35 cycles per zap_pte_range on the first 500 destructions on Pentium-M, but I believe the optimization would win more on older processors which still assert the bus lock on xchg for an exclusive cacheline. Update: I made some new measurements, and this saves exactly 26 cycles over ptep_get_and_clear on Pentium M. On P4, with a PAE kernel, this saves 180 cycles per ptep_get_and_clear, for a whopping 92160 cycles savings for a full address space destruction. pte_clear_full is not yet used, but is provided for future optimizations (in particular, when running inside of a hypervisor that queues page table updates, the full hint allows us to avoid queueing unnecessary page table update for an address space in the process of being destroyed. This is not a huge win, but it does help a bit, and sets the stage for further hypervisor optimization of the mm layer on all architectures. Signed-off-by:
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Kyle Moffett authored
This is used only in slab.c and each architecture gets to define whcih underlying type is to be used. Seems a bit silly - move it to slab.c and use the same type for all architectures: unsigned int. Signed-off-by:
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Chen, Kenneth W authored
I don't think we need to call hugetlb_clean_stale_pgtable() anymore in 2.6.13 because of the rework with free_pgtables(). It now collect all the pte page at the time of munmap. It used to only collect page table pages when entire one pgd can be freed and left with staled pte pages. Not anymore with 2.6.13. This function will never be called and We should turn it into a BUG_ON. I also spotted two problems here, not Adam's fault :-) (1) in huge_pte_alloc(), it looks like a bug to me that pud is not checked before calling pmd_alloc() (2) in hugetlb_clean_stale_pgtable(), it also missed a call to pmd_free_tlb. I think a tlb flush is required to flush the mapping for the page table itself when we clear out the pmd pointing to a pte page. However, since hugetlb_clean_stale_pgtable() is never called, so it won't trigger the bug. Signed-off-by:Ken Chen <kenneth.w.chen@intel.com> Cc: Adam Litke <agl@us.ibm.com> Signed-off-by:
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Adam Litke authored
For demand faulting, we cannot assume that the page tables will be populated. Do what the rest of the architectures do and test p?d_present() while walking down the page table. Signed-off-by:
Adam Litke <agl@us.ibm.com> Cc: <linux-mm@kvack.org> Signed-off-by:
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Adam Litke authored
Initial Post (Wed, 17 Aug 2005) This patch moves the if (! pte_none(*pte)) hugetlb_clean_stale_pgtable(pte); logic into huge_pte_alloc() so all of its callers can be immune to the bug described by Kenneth Chen at http://lkml.org/lkml/2004/6/16/246 > It turns out there is a bug in hugetlb_prefault(): with 3 level page table, > huge_pte_alloc() might return a pmd that points to a PTE page. It happens > if the virtual address for hugetlb mmap is recycled from previously used > normal page mmap. free_pgtables() might not scrub the pmd entry on > munmap and hugetlb_prefault skips on any pmd presence regardless what type > it is. Unless I am missing something, it seems more correct to place the check inside huge_pte_alloc() to prevent a the same bug wherever a huge pte is allocated. It also allows checking for this condition when lazily faulting huge pages later in the series. Signed-off-by:
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Adam Litke authored
This patch adds a macro pte_huge(pte) for i386/x86_64 which is needed by a patch later in the series. Instead of repeating (_PAGE_PRESENT | _PAGE_PSE), I've added __LARGE_PTE to i386 to match x86_64. Signed-off-by:
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Deepak Saxena authored
Version 6 of the ARM architecture introduces the concept of 16MB pages (supersections) and 36-bit (40-bit actually, but nobody uses this) physical addresses. 36-bit addressed memory and I/O and ARMv6 can only be mapped using supersections and the requirement on these is that both virtual and physical addresses be 16MB aligned. In trying to add support for ioremap() of 36-bit I/O, we run into the issue that get_vm_area() allows for a maximum of 512K alignment via the IOREMAP_MAX_ORDER constant. To work around this, we can: - Allocate a larger VM area than needed (size + (1ul << IOREMAP_MAX_ORDER)) and then align the pointer ourselves, but this ends up with 512K of wasted VM per ioremap(). - Provide a new __get_vm_area_aligned() API and make __get_vm_area() sit on top of this. I did this and it works but I don't like the idea adding another VM API just for this one case. - My preferred solution which is to allow the architecture to override the IOREMAP_MAX_ORDER constant with it's own version. Signed-off-by:
Deepak Saxena <dsaxena@plexity.net> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by:
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Paolo 'Blaisorblade' Giarrusso authored
_PAGE_FILE does not indicate whether a file is in page / swap cache, it is set just for non-linear PTE's. Correct the comment for i386, x86_64, UML. Also clearify _PAGE_NONE. Signed-off-by:
Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Hugh Dickins <hugh@veritas.com> Signed-off-by:
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Paolo 'Blaisorblade' Giarrusso authored
If !vma->vm-ops we already BUG above, so retesting it is useless. The compiler cannot optimize this because BUG is a macro and is not thus marked noreturn; that should possibly be fixed. Signed-off-by:
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Paolo 'Blaisorblade' Giarrusso authored
Either shmem_getpage returns a failure, or it found a page, or it was told it couldn't do any I/O. So it's useless to check nonblock in the else branch. We could add a BUG() there but I preferred to comment the offending function. This was taken out from one Ingo Molnar's old patch I'm resurrecting. Signed-off-by:
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Martin Hicks authored
Fix a small spelling mistake. subtile->subtle Signed-off-by:
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Paolo 'Blaisorblade' Giarrusso authored
smp_entry_t -> swap_entry_t Signed-off-by:
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Hugh Dickins authored
Better late than never, I've at last reviewed the madvise vma merging going into 2.6.13. Remove a pointless check and fix two little bugs - a simple test (with /proc/<pid>/maps hacked to show ReadHints) showed both mismerges in practice: though being madvise, neither was disastrous. 1. Correct placement of the success label in madvise_behavior: as in mprotect_fixup and mlock_fixup, it is necessary to update vm_flags when vma_merge succeeds (to handle the exceptional Case 8 noted in the comments above vma_merge itself). 2. Correct initial value of prev when starting part way into a vma: as in sys_mprotect and do_mlock, it needs to be set to vma in this case (vma_merge handles only that minimum of cases shown in its comments). 3. If find_vma_prev sets prev, then the vma it returns is prev->vm_next, so it's pointless to make that same assignment again in sys_madvise. Signed-off-by:
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Martin Hicks authored
Christoph Lameter and Marcelo Tosatti asked to get rid of the atomic_inc_and_test() to cleanup the atomic ops in the zone reclaim code. Signed-off-by:
Christoph Lameter <clameter@sgi.com> Signed-off-by:
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