1. 03 4月, 2009 4 次提交
    • W
      vfs: skip I_CLEAR state inodes · b6fac63c
      Wu Fengguang 提交于
      clear_inode() will switch inode state from I_FREEING to I_CLEAR, and do so
      _outside_ of inode_lock.  So any I_FREEING testing is incomplete without a
      coupled testing of I_CLEAR.
      
      So add I_CLEAR tests to drop_pagecache_sb(), generic_sync_sb_inodes() and
      add_dquot_ref().
      
      Masayoshi MIZUMA discovered the bug in drop_pagecache_sb() and Jan Kara
      reminds fixing the other two cases.
      
      Masayoshi MIZUMA has a nice panic flow:
      
      =====================================================================
                  [process A]               |        [process B]
       |                                    |
       |    prune_icache()                  | drop_pagecache()
       |      spin_lock(&inode_lock)        |   drop_pagecache_sb()
       |      inode->i_state |= I_FREEING;  |       |
       |      spin_unlock(&inode_lock)      |       V
       |          |                         |     spin_lock(&inode_lock)
       |          V                         |         |
       |      dispose_list()                |         |
       |        list_del()                  |         |
       |        clear_inode()               |         |
       |          inode->i_state = I_CLEAR  |         |
       |            |                       |         V
       |            |                       |      if (inode->i_state & (I_FREEING|I_WILL_FREE))
       |            |                       |              continue;           <==== NOT MATCH
       |            |                       |
       |            |                       | (DANGER from here on! Accessing disposing inode!)
       |            |                       |
       |            |                       |      __iget()
       |            |                       |        list_move() <===== PANIC on poisoned list !!
       V            V                       |
      (time)
      =====================================================================
      Reported-by: NMasayoshi MIZUMA <m.mizuma@jp.fujitsu.com>
      Reviewed-by: NJan Kara <jack@suse.cz>
      Signed-off-by: NWu Fengguang <fengguang.wu@intel.com>
      Cc: <stable@kernel.org>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      b6fac63c
    • D
      nommu: fix a number of issues with the per-MM VMA patch · 33e5d769
      David Howells 提交于
      Fix a number of issues with the per-MM VMA patch:
      
       (1) Make mmap_pages_allocated an atomic_long_t, just in case this is used on
           a NOMMU system with more than 2G pages.  Makes no difference on a 32-bit
           system.
      
       (2) Report vma->vm_pgoff * PAGE_SIZE as a 64-bit value, not a 32-bit value,
           lest it overflow.
      
       (3) Move the allocation of the vm_area_struct slab back for fork.c.
      
       (4) Use KMEM_CACHE() for both vm_area_struct and vm_region slabs.
      
       (5) Use BUG_ON() rather than if () BUG().
      
       (6) Make the default validate_nommu_regions() a static inline rather than a
           #define.
      
       (7) Make free_page_series()'s objection to pages with a refcount != 1 more
           informative.
      
       (8) Adjust the __put_nommu_region() banner comment to indicate that the
           semaphore must be held for writing.
      
       (9) Limit the number of warnings about munmaps of non-mmapped regions.
      Reported-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NDavid Howells <dhowells@redhat.com>
      Cc: Greg Ungerer <gerg@snapgear.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      33e5d769
    • S
      fb: nvidiafb recognizes geforcego 7300 chip as mobile · 5482415a
      Sergey Senozhatsky 提交于
      nvidiafb recognizes geforcego 7300 chip as mobile
      Signed-off-by: NSergey Senozhatsky <sergey.senozhatsky@mail.by>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      5482415a
    • A
      generic debug pagealloc: build fix · ee3b4290
      Akinobu Mita 提交于
      This fixes a build failure with generic debug pagealloc:
      
        mm/debug-pagealloc.c: In function 'set_page_poison':
        mm/debug-pagealloc.c:8: error: 'struct page' has no member named 'debug_flags'
        mm/debug-pagealloc.c: In function 'clear_page_poison':
        mm/debug-pagealloc.c:13: error: 'struct page' has no member named 'debug_flags'
        mm/debug-pagealloc.c: In function 'page_poison':
        mm/debug-pagealloc.c:18: error: 'struct page' has no member named 'debug_flags'
        mm/debug-pagealloc.c: At top level:
        mm/debug-pagealloc.c:120: error: redefinition of 'kernel_map_pages'
        include/linux/mm.h:1278: error: previous definition of 'kernel_map_pages' was here
        mm/debug-pagealloc.c: In function 'kernel_map_pages':
        mm/debug-pagealloc.c:122: error: 'debug_pagealloc_enabled' undeclared (first use in this function)
      
      by fixing
      
       - debug_flags should be in struct page
       - define DEBUG_PAGEALLOC config option for all architectures
      Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com>
      Reported-by: NAlexander Beregalov <a.beregalov@gmail.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      ee3b4290
  2. 02 4月, 2009 17 次提交
  3. 01 4月, 2009 19 次提交