On Sun, Oct 02, 2016 at 10:28:31PM -0400, James Simmons wrote: > From: Henri Doreau <henri.doreau@xxxxxx> > > Implement non-blocking migration based on exclusive open instead of > group lock. Implemented exclusive close operation to atomically put > a lease, swap two layouts and close a file. This allows race-free > migrations. > > Make the caller responsible for retrying on failure (EBUSY, EAGAIN) > in non-blocking mode. > > In blocking mode, allow applications to trigger layout swaps using a > grouplock they already own, to prevent race conditions between the > actual data copy and the layout swap. Updated lfs accordingly. File > leases are also taken in blocking mode, so that lfs migrate can issue > a warning if an application attempts to open a file that is being > migrated and gets blocked. > > Timestamps (atime/mtime) are set from userland, after the layout swap > is performed, to prevent conflicts with the grouplock. > > lli_trunc_sem is taken/released in the vvp_io layer, under the DLM > lock. This re-ordering fixes the original issue between truncate and > migrate. > > Signed-off-by: Henri Doreau <henri.doreau@xxxxxx> > Signed-off-by: Jinshan Xiong <jinshan.xiong@xxxxxxxxx> > Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-4840 > Reviewed-on: http://review.whamcloud.com/10013 > Reviewed-by: John L. Hammond <john.hammond@xxxxxxxxx> > Reviewed-by: frank zago <fzago@xxxxxxxx> > Reviewed-by: Oleg Drokin <oleg.drokin@xxxxxxxxx> > Signed-off-by: James Simmons <jsimmons@xxxxxxxxxxxxx> > --- > .../lustre/lustre/include/lustre/lustre_idl.h | 5 +- > .../lustre/lustre/include/lustre/lustre_user.h | 1 + > .../lustre/lustre/include/lustre_req_layout.h | 2 +- > drivers/staging/lustre/lustre/llite/file.c | 231 ++++++++++++-------- > drivers/staging/lustre/lustre/llite/llite_lib.c | 4 - > drivers/staging/lustre/lustre/llite/vvp_io.c | 82 +++++--- > drivers/staging/lustre/lustre/mdc/mdc_lib.c | 34 ++-- > drivers/staging/lustre/lustre/mdc/mdc_request.c | 7 +- > drivers/staging/lustre/lustre/ptlrpc/layout.c | 10 +- > 9 files changed, 235 insertions(+), 141 deletions(-) This patch also failed to apply :( _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
