1. 20 4月, 2005 3 次提交
    • H
      [PATCH] freepgt: free_pgtables use vma list · e0da382c
      Hugh Dickins 提交于
      Recent woes with some arches needing their own pgd_addr_end macro; and 4-level
      clear_page_range regression since 2.6.10's clear_page_tables; and its
      long-standing well-known inefficiency in searching throughout the higher-level
      page tables for those few entries to clear and free: all can be blamed on
      ignoring the list of vmas when we free page tables.
      
      Replace exit_mmap's clear_page_range of the total user address space by
      free_pgtables operating on the mm's vma list; unmap_region use it in the same
      way, giving floor and ceiling beyond which it may not free tables.  This
      brings lmbench fork/exec/sh numbers back to 2.6.10 (unless preempt is enabled,
      in which case latency fixes spoil unmap_vmas throughput).
      
      Beware: the do_mmap_pgoff driver failure case must now use unmap_region
      instead of zap_page_range, since a page table might have been allocated, and
      can only be freed while it is touched by some vma.
      
      Move free_pgtables from mmap.c to memory.c, where its lower levels are adapted
      from the clear_page_range levels.  (Most of free_pgtables' old code was
      actually for a non-existent case, prev not properly set up, dating from before
      hch gave us split_vma.) Pass mmu_gather** in the public interfaces, since we
      might want to add latency lockdrops later; but no attempt to do so yet, going
      by vma should itself reduce latency.
      
      But what if is_hugepage_only_range?  Those ia64 and ppc64 cases need careful
      examination: put that off until a later patch of the series.
      
      What of x86_64's 32bit vdso page __map_syscall32 maps outside any vma?
      
      And the range to sparc64's flush_tlb_pgtables?  It's less clear to me now that
      we need to do more than is done here - every PMD_SIZE ever occupied will be
      flushed, do we really have to flush every PGDIR_SIZE ever partially occupied? 
      A shame to complicate it unnecessarily.
      
      Special thanks to David Miller for time spent repairing my ceilings.
      Signed-off-by: NHugh Dickins <hugh@veritas.com>
      Signed-off-by: NAndrew Morton <akpm@osdl.org>
      Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      e0da382c
    • L
      Merge with kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6.git/ · 9f6c6fc5
      Linus Torvalds 提交于
      for 13 driver core, sysfs, and debugfs fixes.
      9f6c6fc5
    • L
      Merge with kernel.org:/pub/scm/linux/kernel/git/gregkh/aoe-2.6.git/ · c3c66193
      Linus Torvalds 提交于
      for 11 aoe bugfix patches.
      c3c66193
  2. 19 4月, 2005 37 次提交