In DAFS, replace uses of the VLockPartition_r partition-level locks with
the approprivate VLockVolume*NB volume-level locks (and sometimes
FSYNC_VerifyCheckout). This allows for greater parallelization of
volserver attachment / volume creation, for volume operations to occur
during salvages, and for multiple salvages on a single partition to
occur simultaneously.
More architectural details of volume-level locks can be found in the
changes to doc/arch/dafs-overview.txt.
Change-Id: I4e8ef4c864002d7e7c976691824c53dfa9cfaf91
Reviewed-on: http://gerrit.openafs.org/1406
Tested-by: Andrew Deason <adeason@sinenomine.net>
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>
Add some developer documentation for DAFS. This isn't comprehensive or
extremely detailed, but is intended to provide a larger-picture overview
of some of the pieces of DAFS. More detailed docs are intended to exist
in source comments (doxygen and such), and should already be there for
the most part.
Change-Id: I167b52c3bfb9e6b4b7111b3548ca8b1dafe305ea
Reviewed-on: http://gerrit.openafs.org/1376
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>
