1. 11 Jan, 2003 5 commits
    • Andrew Morton's avatar
      [PATCH] Don't reverse the VMA list in touched_by_munmap() · 670fe925
      Andrew Morton authored
      touched_by_munmap() returns a reversed list of VMA's.  That makes things
      harder in the low-latency-page-zapping patch.
      
      So change touched_by_munmap() to return a VMA list which is in the original
      order - ascending virtual addresses.
      
      Oh, and rename it to <hugh>detach_vmas_to_be_unmapped()</hugh>.  It now
      returns nothing, because we know that the VMA we passed in is the head of the
      to-be-unmapped list.
      670fe925
    • Andrew Morton's avatar
      [PATCH] replace `typedef mmu_gather_t' with `struct mmu_gather' · 0c17b328
      Andrew Morton authored
      In the next patch I wish to add to mm.h prototypes of functions which take an
      mmu_gather_t* argument.   To do this I must either:
      
      a) include tlb.h in mm.h
      
         Not good - more nested includes when a simple forward decl is sufficient.
      
      b) Add `typedef struct free_pte_ctx mmu_gather_t;' to mm.h.
      
         That's silly - it's supposed to be an opaque type.
      
         or
      
      c) Remove the pesky typedef.
      
         Bingo.
      0c17b328
    • Andrew Morton's avatar
      [PATCH] simplify and generalise cond_resched_lock · ab706391
      Andrew Morton authored
      cond_resched_lock() _used_ to be "if this is the only lock which I am holding
      then drop it and schedule if needed".
      
      However with the i_shared_lock->i_shared_sem change, neither of its two
      callsites now need those semantics.  So this patch changes it to mean just
      "if needed, drop this lock and reschedule".
      
      This allows us to also schedule if CONFIG_PREEMPT=n, which is useful -
      zap_page_range() can run for an awfully long time.
      
      The preempt and non-preempt versions of cond_resched_lock() have been
      unified.
      ab706391
    • Andrew Morton's avatar
      [PATCH] turn i_shared_lock into a semaphore · d9be9136
      Andrew Morton authored
      i_shared_lock is held for a very long time during vmtruncate() and causes
      high scheduling latencies when truncating a file which is mmapped.  I've seen
      100 milliseconds.
      
      So turn it into a semaphore.  It nests inside mmap_sem.
      
      This change is also needed by the shared pagetable patch, which needs to
      unshare pte's on the vmtruncate path - lots of pagetable pages need to
      be allocated and they are using __GFP_WAIT.
      
      The patch also makes unmap_vma() static.
      d9be9136
    • Ingo Molnar's avatar
      [PATCH] ptrace-fix-2.5.56-A0 · b473e48b
      Ingo Molnar authored
      This patch from Roland McGrath fixes a threading related ptrace bug:
      PTRACE_ATTACH should not stop everybody for each thread attached.
      b473e48b
  2. 10 Jan, 2003 35 commits