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ae55fa3153
We were setting sk_allocation on the quorum UDP sockets to prevent entering reclaim while using sockets but we missed setting it on the regular messaging TCP sockets. This could create deadlocks where the sending socket could enter scoutfs reclaim and wait for server messages while holding the socket lock, preventing the receive thread from receiving messages while it blocked on the socket lock. The fix is to prevent entering the FS to reclaim during socket allocations. Signed-off-by: Zach Brown <zab@versity.com>
Introduction
scoutfs is a clustered in-kernel Linux filesystem designed to support large archival systems. It features additional interfaces and metadata so that archive agents can perform their maintenance workflows without walking all the files in the namespace. Its cluster support lets deployments add nodes to satisfy archival tier bandwidth targets.
The design goal is to reach file populations in the trillions, with the archival bandwidth to match, while remaining operational and responsive.
Highlights of the design and implementation include:
- Fully consistent POSIX semantics between nodes
- Atomic transactions to maintain consistent persistent structures
- Integrated archival metadata replaces syncing to external databases
- Dynamic seperation of resources lets nodes write in parallel
- 64bit throughout; no limits on file or directory sizes or counts
- Open GPLv2 implementation
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