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  1. 15 3月, 2011 30 次提交
  3. 14 3月, 2011 1 次提交
  5. 12 3月, 2011 7 次提交
    • C
      Btrfs: break out of shrink_delalloc earlier · 36e39c40
      由 Chris Mason 提交于 
      Josef had changed shrink_delalloc to exit after three shrink
attempts, which wasn't quite enough because new writers could
race in and steal free space.

But it also fixed deadlocks and stalls as we tried to recover
delalloc reservations.  The code was tweaked to loop 1024
times, and would reset the counter any time a small amount
of progress was made.  This was too drastic, and with a
lot of writers we can end up stuck in shrink_delalloc forever.

The shrink_delalloc loop is fairly complex because the caller is looping
too, and the caller will go ahead and force a transaction commit to make
sure we reclaim space.

This reworks things to exit shrink_delalloc when we've forced some
writeback and the delalloc reservations have gone down.  This means
the writeback has not just started but has also finished at
least some of the metadata changes required to reclaim delalloc
space.

If we've got this wrong, we're returning ENOSPC too early, which
is a big improvement over the current behavior of hanging the machine.

Test 224 in xfstests hammers on this nicely, and with 1000 writers
trying to fill a 1GB drive we get our first ENOSPC at 93% full.  The
other writers are able to continue until we get 100%.

This is a worst case test for btrfs because the 1000 writers are doing
small IO, and the small FS size means we don't have a lot of room
for metadata chunks.
Signed-off-by: NChris Mason <chris.mason@oracle.com>
      36e39c40
    • C
      NFS: NFSROOT should default to "proto=udp" · 53d47375
      由 Chuck Lever 提交于 
      There have been a number of recent reports that NFSROOT is no longer
working with default mount options, but fails only with certain NICs.

Brian Downing <bdowning@lavos.net> bisected to commit 56463e50 "NFS:
Use super.c for NFSROOT mount option parsing".  Among other things,
this commit changes the default mount options for NFSROOT to use TCP
instead of UDP as the underlying transport.

TCP seems less able to deal with NICs that are slow to initialize.
The system logs that have accompanied reports of problems all show
that NFSROOT attempts to establish a TCP connection before the NIC is
fully initialized, and thus the TCP connection attempt fails.

When a TCP connection attempt fails during a mount operation, the
NFS stack needs to fail the operation.  Usually user space knows how
and when to retry it.  The network layer does not report a distinct
error code for this particular failure mode.  Thus, there isn't a
clean way for the RPC client to see that it needs to retry in this
case, but not in others.

Because NFSROOT is used in some environments where it is not possible
to update the kernel command line to specify "udp", the proper thing
to do is change NFSROOT to use UDP by default, as it did before commit
56463e50.

To make it easier to see how to change default mount options for
NFSROOT and to distinguish default settings from mandatory settings,
I've adjusted a couple of areas to document the specifics.

root_nfs_cat() is also modified to deal with commas properly when
concatenating strings containing mount option lists.  This keeps
root_nfs_cat() call sites simpler, now that we may be concatenating
multiple mount option strings.
Tested-by: NBrian Downing <bdowning@lavos.net>
Tested-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NChuck Lever <chuck.lever@oracle.com>
Cc: <stable@kernel.org> # 2.6.37
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
      53d47375
    • H
      nfs4: remove duplicated #include · 57df216b
      由 Huang Weiyi 提交于 
      Remove duplicated #include('s) in
  fs/nfs/nfs4proc.c
Signed-off-by: NHuang Weiyi <weiyi.huang@gmail.com>
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
      57df216b
    • T
      NFSv4: nfs4_state_mark_reclaim_nograce() should be static · f9feab1e
      由 Trond Myklebust 提交于 
      There are no more external users of nfs4_state_mark_reclaim_nograce() or
nfs4_state_mark_reclaim_reboot(), so mark them as static.
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
      f9feab1e
    • T
      NFSv4: Fix the setlk error handler · ecac799a
      由 Trond Myklebust 提交于 
      Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
      ecac799a
    • T
      NFSv4.1: Fix the handling of the SEQUENCE status bits · b4410c2f
      由 Trond Myklebust 提交于 
      We want SEQUENCE status bits to be handled by the state manager in order
to avoid threading issues.
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
      b4410c2f
    • T
      NFSv4/4.1: Fix nfs4_schedule_state_recovery abuses · 0400a6b0
      由 Trond Myklebust 提交于 
      nfs4_schedule_state_recovery() should only be used when we need to force
the state manager to check the lease. If we just want to start the
state manager in order to handle a state recovery situation, we should be
using nfs4_schedule_state_manager().

This patch fixes the abuses of nfs4_schedule_state_recovery() by replacing
its use with a set of helper functions that do the right thing.
Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
      0400a6b0
  7. 11 3月, 2011 2 次提交