1. 10 1月, 2006 4 次提交
  2. 09 1月, 2006 2 次提交
    • E
      [PATCH] shrink dentry struct · 5160ee6f
      Eric Dumazet 提交于
      Some long time ago, dentry struct was carefully tuned so that on 32 bits
      UP, sizeof(struct dentry) was exactly 128, ie a power of 2, and a multiple
      of memory cache lines.
      
      Then RCU was added and dentry struct enlarged by two pointers, with nice
      results for SMP, but not so good on UP, because breaking the above tuning
      (128 + 8 = 136 bytes)
      
      This patch reverts this unwanted side effect, by using an union (d_u),
      where d_rcu and d_child are placed so that these two fields can share their
      memory needs.
      
      At the time d_free() is called (and d_rcu is really used), d_child is known
      to be empty and not touched by the dentry freeing.
      
      Lockless lookups only access d_name, d_parent, d_lock, d_op, d_flags (so
      the previous content of d_child is not needed if said dentry was unhashed
      but still accessed by a CPU because of RCU constraints)
      
      As dentry cache easily contains millions of entries, a size reduction is
      worth the extra complexity of the ugly C union.
      Signed-off-by: NEric Dumazet <dada1@cosmosbay.com>
      Cc: Dipankar Sarma <dipankar@in.ibm.com>
      Cc: Maneesh Soni <maneesh@in.ibm.com>
      Cc: Miklos Szeredi <miklos@szeredi.hu>
      Cc: "Paul E. McKenney" <paulmck@us.ibm.com>
      Cc: Ian Kent <raven@themaw.net>
      Cc: Paul Jackson <pj@sgi.com>
      Cc: Al Viro <viro@ftp.linux.org.uk>
      Cc: Christoph Hellwig <hch@lst.de>
      Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
      Cc: Neil Brown <neilb@cse.unsw.edu.au>
      Cc: James Morris <jmorris@namei.org>
      Cc: Stephen Smalley <sds@epoch.ncsc.mil>
      Signed-off-by: NAndrew Morton <akpm@osdl.org>
      Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      5160ee6f
    • T
      [PATCH] fix more missing includes · de25968c
      Tim Schmielau 提交于
      Include fixes for 2.6.14-git11.  Should allow to remove sched.h from
      module.h on i386, x86_64, arm, ia64, ppc, ppc64, and s390.  Probably more
      to come since I haven't yet checked the other archs.
      Signed-off-by: NTim Schmielau <tim@physik3.uni-rostock.de>
      Signed-off-by: NAndrew Morton <akpm@osdl.org>
      Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      de25968c
  3. 08 1月, 2006 1 次提交
  4. 06 1月, 2006 6 次提交
  5. 05 1月, 2006 27 次提交