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  1. 01 1月, 2009 31 次提交
  3. 31 12月, 2008 1 次提交
  5. 29 12月, 2008 8 次提交
    • J
      bio: get rid of bio_vec clearing · d3f76110
      由 Jens Axboe 提交于 
      We don't need to clear the memory used for adding bio_vec entries,
since nobody should be looking at members unitialized. Any valid
use should be below bio->bi_vcnt, and that members up until that count
must be valid since they were added through bio_add_page().
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
      d3f76110
    • J
      Get rid of CONFIG_LSF · b3a6ffe1
      由 Jens Axboe 提交于 
      We have two seperate config entries for large devices/files. One
is CONFIG_LBD that guards just the devices, the other is CONFIG_LSF
that handles large files. This doesn't make a lot of sense, you typically
want both or none. So get rid of CONFIG_LSF and change CONFIG_LBD wording
to indicate that it covers both.
Acked-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
      b3a6ffe1
    • J
      aio: make the lookup_ioctx() lockless · abf137dd
      由 Jens Axboe 提交于 
      The mm->ioctx_list is currently protected by a reader-writer lock,
so we always grab that lock on the read side for doing ioctx
lookups. As the workload is extremely reader biased, turn this into
an rcu hlist so we can make lookup_ioctx() lockless. Get rid of
the rwlock and use a spinlock for providing update side exclusion.

There's usually only 1 entry on this list, so it doesn't make sense
to look into fancier data structures.
Reviewed-by: NJeff Moyer <jmoyer@redhat.com>
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
      abf137dd
    • J
      bio: add support for inlining a number of bio_vecs inside the bio · 392ddc32
      由 Jens Axboe 提交于 
      When we go and allocate a bio for IO, we actually do two allocations.
One for the bio itself, and one for the bi_io_vec that holds the
actual pages we are interested in.

This feature inlines a definable amount of io vecs inside the bio
itself, so we eliminate the bio_vec array allocation for IO's up
to a certain size. It defaults to 4 vecs, which is typically 16k
of IO.
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
      392ddc32
    • J
      bio: allow individual slabs in the bio_set · bb799ca0
      由 Jens Axboe 提交于 
      Instead of having a global bio slab cache, add a reference to one
in each bio_set that is created. This allows for personalized slabs
in each bio_set, so that they can have bios of different sizes.

This means we can personalize the bios we return. File systems may
want to embed the bio inside another structure, to avoid allocation
more items (and stuffing them in ->bi_private) after the get a bio.
Or we may want to embed a number of bio_vecs directly at the end
of a bio, to avoid doing two allocations to return a bio. This is now
possible.
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
      bb799ca0
    • J
      bio: move the slab pointer inside the bio_set · 1b434498
      由 Jens Axboe 提交于 
      In preparation for adding differently sized bios.
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
      1b434498
    • J
      bio: only mempool back the largest bio_vec slab cache · 7ff9345f
      由 Jens Axboe 提交于 
      We only very rarely need the mempool backing, so it makes sense to
get rid of all but one of the mempool in a bio_set. So keep the
largest bio_vec count mempool so we can always honor the largest
allocation, and "upgrade" callers that fail.
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
      7ff9345f
    • K
      block: Supress Buffer I/O errors when SCSI REQ_QUIET flag set · 08bafc03
      由 Keith Mannthey 提交于 
      Allow the scsi request REQ_QUIET flag to be propagated to the buffer
file system layer. The basic ideas is to pass the flag from the scsi
request to the bio (block IO) and then to the buffer layer.  The buffer
layer can then suppress needless printks.

This patch declutters the kernel log by removed the 40-50 (per lun)
buffer io error messages seen during a boot in my multipath setup . It
is a good chance any real errors will be missed in the "noise" it the
logs without this patch.

During boot I see blocks of messages like
"
__ratelimit: 211 callbacks suppressed
Buffer I/O error on device sdm, logical block 5242879
Buffer I/O error on device sdm, logical block 5242879
Buffer I/O error on device sdm, logical block 5242847
Buffer I/O error on device sdm, logical block 1
Buffer I/O error on device sdm, logical block 5242878
Buffer I/O error on device sdm, logical block 5242879
Buffer I/O error on device sdm, logical block 5242879
Buffer I/O error on device sdm, logical block 5242879
Buffer I/O error on device sdm, logical block 5242879
Buffer I/O error on device sdm, logical block 5242872
"
in my logs.

My disk environment is multipath fiber channel using the SCSI_DH_RDAC
code and multipathd.  This topology includes an "active" and "ghost"
path for each lun. IO's to the "ghost" path will never complete and the
SCSI layer, via the scsi device handler rdac code, quick returns the IOs
to theses paths and sets the REQ_QUIET scsi flag to suppress the scsi
layer messages.

 I am wanting to extend the QUIET behavior to include the buffer file
system layer to deal with these errors as well. I have been running this
patch for a while now on several boxes without issue.  A few runs of
bonnie++ show no noticeable difference in performance in my setup.

Thanks for John Stultz for the quiet_error finalization.
Submitted-by: NKeith Mannthey <kmannth@us.ibm.com>
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
      08bafc03