Amir More 9e2eb8cb51 blobstore: Swap cluster maps on snapshot instead of copying ... Previously, when creating a snapshot in blobstore the snapshot's cluster map was copied from the "original" blob, with the original's map zeroed. These operations are both O(num_clusters*cluster_size/page_size) while io operations are frozen. This change replaces the linear operation with an O(1) pointer swap at the critical moment that io is frozen, while doing the zeroing before the freeze when preparing the snapshot to minimize freeze time. Change-Id: I1e468bc97623f5da161a8ddba1393c271acd3aed Signed-off-by: Amir More <habeanf@gmail.com> Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/451486 Reviewed-by: Maciej Szwed <maciej.szwed@intel.com> Reviewed-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com> Reviewed-by: Ben Walker <benjamin.walker@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com> Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>		2019-04-22 18:49:21 +00:00
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bdev	blobstore: Add support for bdev_blob_queue_io in blobstore	2018-09-11 21:19:34 +00:00
blob_bs_dev.c	blobstore: allow I/O operations to use io unit size smaller than page size.	2018-10-04 21:35:24 +00:00
blobstore.c	blobstore: Swap cluster maps on snapshot instead of copying	2019-04-22 18:49:21 +00:00
blobstore.h	blobstore: rename resize_in_progress to locked_operation_in_progress	2019-04-08 21:39:08 +00:00
Makefile	blobstore: Add a blob_bs_dev that provides back_bs_dev for clones	2018-03-08 11:34:15 -05:00
request.c	blob: pass NULL or SPDK_BLOBID_INVALID when bserrno != 0	2019-02-25 07:06:04 +00:00
request.h	blob: remove unused internal functions	2018-08-30 03:41:01 +00:00
zeroes.c	blobstore: allow I/O operations to use io unit size smaller than page size.	2018-10-04 21:35:24 +00:00