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Commits on Apr 19, 2010
  1. HAMMER VFS - Fix probable corruption case when filesystem becomes nea…

    Matthew Dillon committed Apr 19, 2010
    …rly full
    * The reblocking code was incorrectly assuming the cursor would be pointing
      at a valid node element after an unlock/relock sequence, when it could
      actually be pointing at the EOF of a node.  This case can occur when
      the filesystem is nearly full (possibly due to the reblocking operation
      itself), when the filesystem is also under load from unrelated
    * This can result in the creation of a corrupted B-Tree leaf node or
      data record.
    * Corruption can be checked with hammer checkmap and hammer show
      (as of this rev):
      hammer -f device checkmap
    	Should output no B-Tree node records or free space mismatches.
    	You will still get the initial volume summary.
      hammer -f device show | egrep '^B' | egrep -v '^BM'
    	Should output no records.
    * Currently the only recourse if corruption is found is to copy off the
      filesystem, newfs_hammer, and copy it back.
      Full history and snapshots can be retained by using 'hammer -B mirror-read'
      to copy off the filesystem and mirror-write to copy it back.  However,
      pleaes remember you must do this for each PFS individually.  Make sure
      you have a viable backup before newfsing anything.
    Reported-by: Francois Tigeot <>, Jan Lentfer <>
  2. HAMMER VFS - Fix assertion panic related to record flush state

    Matthew Dillon committed Apr 17, 2010
    * This assertion can occur under certain circumstances if a rename
      operation moves a file or directory to a parent directory, due to
      a circular loop in the dependency chain.
    * Fix the problem by allowing the case.
    Reported-by: Sascha Wildner, Alex Hornung, Venkatesh Srinivas, others
  3. HAMMER Util - Add 'checkmap', adjust hammer show

    Matthew Dillon committed Apr 16, 2010
    * Add a checkmap function which scans the B-Tree, collects byte usage,
      and checks it against the blockmap.  This is still experimental.
    * Adjust hammer show to flag zone mismatches instead of asserting.
  4. HAMMER VFS - Fix hammer lock assertion panic when REDO recovery fails

    Matthew Dillon committed Apr 14, 2010
    * REDO recovery failed to release a buffer in its error path, resulting
      in a panic later on.  This patch adds the proper release.
    Reported-by: Venkatesh Srinivas <>
Commits on Apr 13, 2010
  1. nata - Drop pending requests on dump

    bwalex committed Apr 13, 2010
    * Drop all pending requests in the ata queue when we are about to dump.
    * This should solve issues that have been appearing lately causing a
      TAILQ_NEXT panic on dumps with nata under heavy I/O.
    Reported-by: Jan Lentfer (lentferj@), Antonio Huete (tuxillo@)
    Obtained-from: FreeBSD
  2. ata - Fix dumping of old ata driver

    bwalex committed Apr 13, 2010
    * While we still have ata(4) around, make addump work properly again
      with the new dumping infrastructure.
Commits on Apr 10, 2010
  1. Fix LINT build.

    Sascha Wildner committed Apr 10, 2010

    YONETANI Tomokazu committed Apr 10, 2010
    It's incomplete and an undocumented option in acpiconf can trigger
    a kernel panic (only as root, though).
  3. Install the boot(8) manual page too during 64 bit install.

    Sascha Wildner committed Apr 10, 2010
Commits on Apr 9, 2010
  1. linux emu - Refactor open code

    bwalex committed Apr 9, 2010
    * Factor out a linux_open_common that both open() and openat() use.
    * While here, also use CACHE_*MPLOCK*, as is done in vfs_syscalls.c.
  2. linux emu - support O_DIRECTORY for open syscall

    bwalex committed Apr 9, 2010
    * Linux opendir seems to rely on O_DIRECTORY to avoid certain race
      conditions, so introduce O_DIRECTORY support which just returns
      ENOTDIR even if the open is successful, if the opened path is not a
    * This fixes Ant's directory scanner.
    Submitted-by: Johannes Hofmann
Commits on Apr 8, 2010
  1. look(1): Fix my previous commit.

    Sascha Wildner committed Apr 8, 2010
    I broke i386 behavior. Instead, take a nicer fix from NetBSD.
  2. Fix look(1) on x86_64.

    Sascha Wildner committed Apr 8, 2010
    SIZE_T_MAX, being ULONG_MAX, was -1 when cast to off_t (int64_t).
    Reported-by: Urmas Reinsalu <>
Commits on Apr 7, 2010
  1. mqueues: selwakeup() needs the MP lock to be held

    Stathis Kamperis committed Apr 6, 2010
    Briefly-discussed-with: sjg@
Commits on Apr 5, 2010
  1. Sync zoneinfo database with tzdata2010h from

    Sascha Wildner committed Apr 5, 2010
    africa:         8.23 -> 8.24
    asia:           8.58 -> 8.59
    Both Tunisia and Pakistan have decided to abandon DST.
Commits on Apr 4, 2010
  1. nrelease: Remove unused variable.

    Sascha Wildner committed Apr 4, 2010
  2. HAMMER Utility - Change default split size from 100MB to 4G

    Matthew Dillon committed Apr 4, 2010
    * Change the default split size for mirroring from 100MB to 4G.  For very
      large filesystems a small split size can result in very high meta-data
      overheads with very little actual incremental data.
    * Adjust the manual page for the split changes.
    * Adjust the manual page to clarify limitations of the bandwidth option.
  3. nrelease: Add back the creation of the /usr/local hierarchy on the Li…

    Sascha Wildner committed Apr 4, 2010
    Even though nothing in base uses it, it's more convenient to have the
    hierarchy already in place in case the user wants to install some stuff
    the traditional way.
    While doing this, remove the documentation of the 'fetch' target from
    release.7 since this target no longer exists now that cvsup has been
    removed from the LiveCD.
    In-discussion-with: dillon
  4. installer: Fix the LiveCD's /etc/fstab regarding /usr/local.

    Sascha Wildner committed Apr 4, 2010
    /usr/local/etc was mounted read/write (a remnant from the FreeBSD ports
    era). Instead, mount /usr/pkg/etc in order to give the user a chance to
    tweak the settings of the packages which come on the LiveCD.
Commits on Apr 3, 2010
  1. include/Makefile: Add vers.txt to CLEANFILES.

    Sascha Wildner committed Apr 3, 2010
Commits on Apr 1, 2010
  1. kernel - Address excessive stall in pageout during deadlock avoidance

    Matthew Dillon committed Apr 1, 2010
    * The pageout daemon uses LK_TIMELOCK to avoid deadlocking on a vnode
      that might be held locked during a pfault, which waits up to 1/10 of
      a second.
      If the vnode has a large number of pageable pages each page may go
      through the timeout.  This can result in the pageout daemon stalling
      for an excessive amount of time.
      Reduce instances of the problem by remembering the last vnode which
      failed its timelock and using LK_NOWAIT for later pages.  A single
      vnode is remembered for now.
    Reported-by: Francois Tigeot <>
  2. devfs - Fix incorrect st_size reporting

    Matthew Dillon committed Apr 1, 2010
    * The default reported st_size should be 0 and not sizeof(devfs_node).
    * Fixes incorrect reporting for /dev/null and other devices.
    Reported-by: marino2, numerous others (it slipped through the cracks)
  3. HAMMER VFS - Fix insufficient cursor change test

    Matthew Dillon committed Apr 1, 2010
    * The reblocking code tests whether a cursor has changed after being
      unlocked.  This test was insufficient and resulted in an assertion
      panic.  Beef up the test.
    Reported-by: Jan Lentfer <>
Commits on Mar 31, 2010
  1. vinum - change drive parsing

    bwalex committed Mar 31, 2010
    * When calling init_drive() from read_drive_label() change the static 0
      with the verbose var that is passed to read_drive_label().
    * Changed the way the drives are parsed in vinum_scandisk() and removed
      the second iteration of detecting vinum partitions
    Submitted-by: Rumko
    Dragonfly-bug: http//
  2. man - Add .Dx entries for 2.6 and 2.7

    Matthew Dillon committed Mar 31, 2010
    * Add .Dx entries for 2.6 and 2.7 so nroff -mandoc doesn't complain.
  3. HAMMER - Adjust documentation and change default fsync_mode to 3

    Matthew Dillon committed Mar 31, 2010
    * The default fsync_mode is 3 (REDO heuristic with no disk flush).
      This mode is contemporary with what a UFS fsync() does.
  4. devfs - remove obsolete KKASSERT

    bwalex committed Mar 31, 2010
    * remove an obsolete KKASSERT checking namlen in allocp, as one was able
      to trigger it from userland by adding a sufficiently large link rule.
    Reported-by: Sascha Wildner
  5. vkernel - remove stale lwbuf fields in globaldata

    Matthew Dillon committed Mar 31, 2010
    * Remove stale lwbuf fields that are no longer used from the
      vkernel's globaldata.
    * Remove a now-unnecessary #include line from globaldata.h
  6. kernel - lwbuf - Remove dead code

    Matthew Dillon committed Mar 31, 2010
    * Remove dead code.  objcache_get() can't return NULL in this case.
    Submitted-by: sjg
  7. kernel - more lwbuf followup work

    Matthew Dillon committed Mar 31, 2010
    * Make lwbuf objcache only, removing all the manual per-cpu allocation
      tracking.  Keep the cpumask stuff.  We will deal with the KVM
      fragmentation issue inside objcache later on.
    * This basically takes us back to Sam's original objcache implementation.
    * Remove unnecessary assembly symbols (assembly didn't use those globaldata
      fields).  Remove related globaldata fields now that we are back to the
      objcache-only implementation.
  8. kernel - lwbuf, don't rely on gcc auto-arrays

    thesjg committed with Matthew Dillon Mar 31, 2010
  9. kernel - make lwbuf use objcache for ephemeral mappings

    thesjg committed with Matthew Dillon Mar 31, 2010
    * Introduce ephemeral-tagged mappings to lwbuf, these are serviced directly
    from objcache.
    * Add kern.ipc.lwbuf_reserve, a boot-time tuneable that controls the number
    of per-cpu lwbuf's reserved by the subsystem.
    * Add kern.ipw.lwbuf_count, which prints the per-cpu number of lwbufs
    available for allocation.
  10. vkernel - Fix kernel build after recent lwbuf work.

    Joe Talbott committed Mar 31, 2010
    Reviewed-By: sjg
  11. Fix UP kernel build.

    Sascha Wildner committed Mar 31, 2010