1. 03 Apr, 2003 3 commits
    • Andrew Morton's avatar
      [PATCH] monotonic clock source for hangcheck timer · 92525be5
      Andrew Morton authored
      From: john stultz <johnstul@us.ibm.com>
      
      This patch, written with the advice of Joel Becker, addresses a problem with
      the hangcheck-timer.
      
      The basic problem is that the hangcheck-timer code (Required for Oracle)
      needs a accurate hard clock which can be used to detect OS stalls (due to
      udelay() or pci bus hangs) that would cause system time to skew (its sort of
      a sanity check that insures the system's notion of time is accurate).
      However, currently they are using get_cycles() to fetch the cpu's TSC
      register, thus this does not work on systems w/o a synced TSC.
      
      As suggested by Andi Kleen (see thread here:
      http://www.uwsg.iu.edu/hypermail/linux/kernel/0302.0/1234.html ) I've worked
      with Joel and others to implement the monotonic_clock() interface.  Some of
      the major considerations made when writing this patch were
      
      o Needs to be able to return accurate time in the absence of multiple timer
        interrupts
      
      o Needs to be abstracted out from the hardware
      
      o Avoids impacting gettimeofday() performance
      
      This interface returns a unsigned long long representing the number of
      nanoseconds that has passed since time_init().
      92525be5
    • Andrew Morton's avatar
      [PATCH] handle bad inodes in put_inode · 68fa8120
      Andrew Morton authored
      From: "J. Bruce Fields" <bfields@fieldses.org>
      
      If the NFS daemon is presented with a filehandle for a file that has
      been deleted, it does an iget() in fs/exportfs/expfs.c:export_iget() and
      gets a bad inode back.  When it subsequently iput()s the inode, the
      result is:
      
      Mar 27 12:53:40 snoopy kernel: EXT2-fs error (device ide0(3,3)): ext2_free_blocks: Freeing blocks not in datazone - block = 1802201963, count = 27499
      Mar 27 12:53:40 snoopy kernel: Remounting filesystem read-only
      
      The same can happen if ext2_get_inode() returns an error - ext2_read_inode()
      will return an uninitialised inode and ext2_put_inode() is not allowed to go
      looking inside the bad inode.
      68fa8120
    • Andrew Morton's avatar
      [PATCH] tmpfs blk_congestion_wait fix · 505f7dd2
      Andrew Morton authored
      From: Hugh Dickins <hugh@veritas.com>
      
      The blk_congestion_waits in shmem_getpage are appropriate when the error is
      -ENOMEM, but not when the error is -EEXIST.  So add that test in the first
      instance, but omit it all in the second instance.
      505f7dd2
  2. 02 Apr, 2003 19 commits
  3. 01 Apr, 2003 18 commits