branch master updated (46b8676 -> d310632)

[Christopher Baines]

cbaines pushed a change to branch master
in repository data-service.

    from 46b8676  Fix free-disk-space call
     new f1071cb  Use a dedicated fiber for heap size monitoring
     new b655184  Increase parallelism when loading revisions
     new d53b91d  Fix extract-information-from message
     new 38e5282  Add fibers-promise-reset
     new 052cf75  Ensure the guix derivations are stored prior to attempting to 
substitute
     new ff32aa8  Include the package version in the "error when computing" 
messages
     new 38d5501  Add placeholder derivation source file nar procedures
     new 1e0407e  Use a common derivation-ids-hash-table
     new c650fc6  Rework inserting derivations
     new 1782a33  Add a comment
     new f8ac6e3  Add make-queueing-channel
     new 55af7c8  Add new fibers utilities
     new 2d7100e  Add call-with-default-io-waiters
     new de5e036  Ensure that call-with-resource-from-pool doesn't get stuck
     new af93bdc  Tweak the resource pool return behaviour
     new e67edf5  Finish chasing the call-with-resource-pool bug
     new 6265c37  Increase the sleep-operation time for telling waiters to retry
     new ed6a4b1  Use a separate db connection in 
channel-derivations-by-system-promise
     new cee8868  Refactor
     new d310632  Move the inferior cleanup to the end of each system+target

The 20 revisions listed above as "new" are entirely new to this
repository and will be described in separate emails.  The revisions
listed as "add" were already present in the repository and have only
been added to this reference.


Summary of changes:
 guix-data-service/jobs/load-new-guix-revision.scm | 1092 ++++++++++++---------
 guix-data-service/model/derivation.scm            |   34 +
 guix-data-service/utils.scm                       |  381 +++++--
 3 files changed, 941 insertions(+), 566 deletions(-)