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  1. 27 Mar, 2012 1 commit
    • Josef Bacik's avatar
      Btrfs: deal with read errors on extent buffers differently · ea466794
      Josef Bacik authored 
      Since we need to read and write extent buffers in their entirety we can't use
the normal bio_readpage_error stuff since it only works on a per page basis.  So
instead make it so that if we see an io error in endio we just mark the eb as
having an IO error and then in btree_read_extent_buffer_pages we will manually
try other mirrors and then overwrite the bad mirror if we find a good copy.
This works with larger than page size blocks.  Thanks,
Signed-off-by: default avatarJosef Bacik <josef@redhat.com>
Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
      ea466794
  3. 26 Mar, 2012 12 commits
    • Chris Mason's avatar
      Btrfs: don't use threaded IO completion helpers for metadata writes · f3f266ab
      Chris Mason authored 
      The metadata write IO completion code is now simple enough that we
don't need the threaded helpers anymore.
Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
      f3f266ab
    • Chris Mason's avatar
      Btrfs: adjust the write_lock_level as we unlock · f7c79f30
      Chris Mason authored 
      btrfs_search_slot sometimes needs write locks on high levels of
the tree.  It remembers the highest level that needs a write lock
and will use that for all future searches through the tree in a given
call.

But, very often we'll just cow the top level or the level below and we
won't really need write locks on the root again after that.  This patch
changes things to adjust the write lock requirement as it unlocks
levels.
Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
      f7c79f30
    • Chris Mason's avatar
      Btrfs: loop waiting on writeback · a098d8e8
      Chris Mason authored 
      lock_extent_buffer_for_io needs to loop around and make sure the
writeback bits are not set.
Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
      a098d8e8
    • Chris Mason's avatar
      Btrfs: add the ability to cache a pointer into the eb · cfed81a0
      Chris Mason authored 
      This cuts down on the CPU time used by map_private_extent_buffer
Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
      cfed81a0
    • Josef Bacik's avatar
      Btrfs: ensure an entire eb is written at once · 0b32f4bb
      Josef Bacik authored 
      This patch simplifies how we track our extent buffers.  Previously we could exit
writepages with only having written half of an extent buffer, which meant we had
to track the state of the pages and the state of the extent buffers differently.
Now we only read in entire extent buffers and write out entire extent buffers,
this allows us to simply set bits in our bflags to indicate the state of the eb
and we no longer have to do things like track uptodate with our iotree.  Thanks,
Signed-off-by: default avatarJosef Bacik <josef@redhat.com>
Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
      0b32f4bb
    • Josef Bacik's avatar
      Btrfs: introduce mark_extent_buffer_accessed · 5df4235e
      Josef Bacik authored 
      Because an eb can have multiple pages we need to make sure that all pages within
the eb are markes as accessed, since releasepage can be called against any page
in the eb.  This will keep us from possibly evicting hot eb's when we're doing
larger than pagesize eb's.  Thanks,
Signed-off-by: default avatarJosef Bacik <josef@redhat.com>
      5df4235e
    • Josef Bacik's avatar
      Btrfs: introduce free_extent_buffer_stale · 3083ee2e
      Josef Bacik authored 
      Because btrfs cow's we can end up with extent buffers that are no longer
necessary just sitting around in memory.  So instead of evicting these pages, we
could end up evicting things we actually care about.  Thus we have
free_extent_buffer_stale for use when we are freeing tree blocks.  This will
make it so that the ref for the eb being in the radix tree is dropped as soon as
possible and then is freed when the refcount hits 0 instead of waiting to be
released by releasepage.  Thanks,
Signed-off-by: default avatarJosef Bacik <josef@redhat.com>
      3083ee2e
    • Josef Bacik's avatar
      Btrfs: only use the existing eb if it's count isn't 0 · 115391d2
      Josef Bacik authored 
      We can run into a problem where we find an eb for our existing page already on
the radix tree but it has a ref count of 0.  It hasn't yet been removed by RCU
yet so this can cause issues where we will use the EB after free.  So do
atomic_inc_not_zero on the exists->refs and if it is zero just do
synchronize_rcu() and try again.  We won't have to worry about new allocators
coming in since they will block on the page lock at this point.  Thanks,
Signed-off-by: default avatarJosef Bacik <josef@redhat.com>
      115391d2
    • Josef Bacik's avatar
      Btrfs: set page->private to the eb · 4f2de97a
      Josef Bacik authored 
      We spend a lot of time looking up extent buffers from pages when we could just
store the pointer to the eb the page is associated with in page->private.  This
patch does just that, and it makes things a little simpler and reduces a bit of
CPU overhead involved with doing metadata IO.  Thanks,
Signed-off-by: default avatarJosef Bacik <josef@redhat.com>
      4f2de97a
    • Chris Mason's avatar
      Btrfs: allow metadata blocks larger than the page size · 727011e0
      Chris Mason authored 
      A few years ago the btrfs code to support blocks lager than
the page size was disabled to fix a few corner cases in the
page cache handling.  This fixes the code to properly support
large metadata blocks again.

Since current kernels will crash early and often with larger
metadata blocks, this adds an incompat bit so that older kernels
can't mount it.

This also does away with different blocksizes for nodes and leaves.
You get a single block size for all tree blocks.
Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
      727011e0
    • Josef Bacik's avatar
      Btrfs: remove search_start and search_end from find_free_extent and callers · 81c9ad23
      Josef Bacik authored 
      We have been passing nothing but (u64)-1 to find_free_extent for search_end in
all of the callers, so it's completely useless, and we've always been passing 0
in as search_start, so just remove them as function arguments and move
search_start into find_free_extent.  Thanks,
Signed-off-by: default avatarJosef Bacik <josef@redhat.com>
      81c9ad23
    • Josef Bacik's avatar
      Btrfs: remove the ideal caching code · 285ff5af
      Josef Bacik authored 
      This is a relic from before we had the disk space cache and it was to make
bootup times when you had btrfs as root not be so damned slow.  Now that we have
the disk space cache this isn't a problem anymore and really having this code
casues uneeded fragmentation and complexity, so just remove it.  Thanks,
Signed-off-by: default avatarJosef Bacik <josef@redhat.com>
      285ff5af
  5. 18 Mar, 2012 3 commits
    • Linus Torvalds's avatar
      Linux 3.3 · c16fa4f2
      Linus Torvalds authored
      c16fa4f2
    • Jason Baron's avatar
      Don't limit non-nested epoll paths · 93dc6107
      Jason Baron authored 
      Commit 28d82dc1 ("epoll: limit paths") that I did to limit the
number of possible wakeup paths in epoll is causing a few applications
to longer work (dovecot for one).

The original patch is really about limiting the amount of epoll nesting
(since epoll fds can be attached to other fds). Thus, we probably can
allow an unlimited number of paths of depth 1. My current patch limits
it at 1000. And enforce the limits on paths that have a greater depth.

This is captured in: https://bugzilla.redhat.com/show_bug.cgi?id=681578Signed-off-by: default avatarJason Baron <jbaron@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      93dc6107
    • Linus Torvalds's avatar
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net · c579bc7e
      Linus Torvalds authored 
      Pull networking changes from David Miller:
 "1) icmp6_dst_alloc() returns NULL instead of ERR_PTR() leading to
     crashes, particularly during shutdown.  Reported by Dave Jones and
     fixed by Eric Dumazet.

  2) hyperv and wimax/i2400m return NETDEV_TX_BUSY when they have
     already freed the SKB, which causes crashes as to the caller this
     means requeue the packet.  Fixes from Eric Dumazet.

  3) usbnet driver doesn't allocate the right amount of headroom on
     fresh RX SKBs, fix from Eric Dumazet.

  4) Fix regression in ip6_mc_find_dev_rcu(), as an RCU lookup it
     abolutely should not take a reference to 'dev', this leads to
     leaks.  Fix from RonQing Li.

  5) Fix netfilter ctnetlink race between delete and timeout expiration.
     From Pablo Neira Ayuso.

  6) Revert SFQ change which causes regressions, specifically queueing
     to tail can lead to unavoidable flow starvation.  From Eric
     Dumazet.

  7) Fix a memory leak and a crash on corrupt firmware files in bnx2x,
     from Michal Schmidt."

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
  netfilter: ctnetlink: fix race between delete and timeout expiration
  ipv6: Don't dev_hold(dev) in ip6_mc_find_dev_rcu.
  wimax/i2400m: fix erroneous NETDEV_TX_BUSY use
  net/hyperv: fix erroneous NETDEV_TX_BUSY use
  net/usbnet: reserve headroom on rx skbs
  bnx2x: fix memory leak in bnx2x_init_firmware()
  bnx2x: fix a crash on corrupt firmware file
  sch_sfq: revert dont put new flow at the end of flows
  ipv6: fix icmp6_dst_alloc()
      c579bc7e
  7. 17 Mar, 2012 10 commits
  9. 16 Mar, 2012 14 commits
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