DataDog/datadog-agent
Jan 2025 – Feb 2026
12 Months active
Languages Used
CGoJSONShellAssemblyMarkdown
Technical Skills
C DevelopmentGo DevelopmentLinux KernelNetwork ProgrammingObservabilitySecurity Monitoring
Márcio Kovags
PROFILE
Márcio Kovags
Over twelve months, Marcio Kovags engineered advanced security and observability features for the DataDog/datadog-agent repository, focusing on kernel-level event monitoring and mountpoint management. He implemented syscall instrumentation and eBPF-based event capture in C and Go, enabling detailed tracking of network and filesystem operations. Marcio addressed complex issues such as race conditions, memory optimization, and test flakiness, refining data serialization and error handling for robust telemetry. His work modernized mount resolution, improved DNS event fidelity, and enhanced performance under high load, demonstrating depth in Linux kernel programming, concurrent programming, and backend development while ensuring reliable, scalable monitoring for production environments.
Overall Statistics
Feature vs Bugs
52%Features
Repository Contributions
36Total
Bugs
11
Commits
36
Features
12
Lines of code
12,065
Activity Months12
Your Network
1100 people
Work History
February 2026
1 Commits
Feb 1, 2026February 2026: Delivered a focused bug fix in datadog-agent that corrects Mount Resolver Path Invalidation during procfs insertions, improving mountpoint synchronization accuracy across platforms. The change reduces edge-case path invalidations and enhances agent reliability. Implemented as a targeted patch aligned with the [CWS] Fix mount resolver (#45750) (commit 305406c9a85d63b1de8b2420e1e522b71335e5d2). This work strengthens system correctness and stability in the mount management and data collection pipeline, delivering measurable improvements in data fidelity and uptime for customers.
1 Commits
Feb 1, 2026February 2026: Delivered a focused bug fix in datadog-agent that corrects Mount Resolver Path Invalidation during procfs insertions, improving mountpoint synchronization accuracy across platforms. The change reduces edge-case path invalidations and enhances agent reliability. Implemented as a targeted patch aligned with the [CWS] Fix mount resolver (#45750) (commit 305406c9a85d63b1de8b2420e1e522b71335e5d2). This work strengthens system correctness and stability in the mount management and data collection pipeline, delivering measurable improvements in data fidelity and uptime for customers.
February 2026
January 2026
7 Commits • 2 Features
Jan 1, 2026January 2026 (2026-01) – Datadog agent delivered targeted performance improvements in event processing and mount management, with enhanced observability to support capacity planning and troubleshooting at scale. The work focused on reducing CPU load under high event volumes, minimizing kernel-to-userspace traffic, and improving mount resolution performance, backed by new metrics for visibility.
January 2026
7 Commits • 2 Features
Jan 1, 2026January 2026 (2026-01) – Datadog agent delivered targeted performance improvements in event processing and mount management, with enhanced observability to support capacity planning and troubleshooting at scale. The work focused on reducing CPU load under high event volumes, minimizing kernel-to-userspace traffic, and improving mount resolution performance, backed by new metrics for visibility.
December 2025
2 Commits
Dec 1, 2025December 2025 (DataDog/datadog-agent) focused on stabilizing core mount-related functionality by resolving two critical bugs, improving test reliability, and strengthening overall code quality. Deliverables center on correctness of inode namespace retrieval in the Listmount Snapshotter and complete propagation of updates in the Mount Resolver after loop detection, with targeted test fixes to validate changes. These fixes reduce flakiness, support more reliable telemetry, and lower incident risk in production deployments.
2 Commits
Dec 1, 2025December 2025 (DataDog/datadog-agent) focused on stabilizing core mount-related functionality by resolving two critical bugs, improving test reliability, and strengthening overall code quality. Deliverables center on correctness of inode namespace retrieval in the Listmount Snapshotter and complete propagation of updates in the Mount Resolver after loop detection, with targeted test fixes to validate changes. These fixes reduce flakiness, support more reliable telemetry, and lower incident risk in production deployments.
December 2025
November 2025
3 Commits • 1 Features
Nov 1, 2025November 2025 delivered targeted reliability and scalability improvements for the Datadog Agent (DataDog/datadog-agent). Key work included fixing a data race in the raw packet unmarshaller to ensure safe concurrent JSON serialization, stabilizing the MoveMount recursive propagation test to eliminate flaky behavior, and overhauling the mount resolver to introduce unique mount IDs, namespace tracking, and improved event handling with optimized listing. These changes reduce runtime risk in concurrent paths, improve test stability, and provide a more robust foundation for scalable mount management.
November 2025
3 Commits • 1 Features
Nov 1, 2025November 2025 delivered targeted reliability and scalability improvements for the Datadog Agent (DataDog/datadog-agent). Key work included fixing a data race in the raw packet unmarshaller to ensure safe concurrent JSON serialization, stabilizing the MoveMount recursive propagation test to eliminate flaky behavior, and overhauling the mount resolver to introduce unique mount IDs, namespace tracking, and improved event handling with optimized listing. These changes reduce runtime risk in concurrent paths, improve test stability, and provide a more robust foundation for scalable mount management.
October 2025
5 Commits • 1 Features
Oct 1, 2025Summary for 2025-10: Delivered stability, visibility, and reliability improvements for the DataDog/datadog-agent. Key outcomes include memory and performance gains from the Mountlister OOM fix, enhanced DNS observability with a new FAILED_DNS event and safer data handling, and increased reliability of mount-related tests through MoveMountRecursivePropagation stabilization. These changes reduce memory pressure on nodes with many mounts, improve security auditing and data quality for DNS events, and lower CI flakiness, accelerating issue detection and resolution.
5 Commits • 1 Features
Oct 1, 2025Summary for 2025-10: Delivered stability, visibility, and reliability improvements for the DataDog/datadog-agent. Key outcomes include memory and performance gains from the Mountlister OOM fix, enhanced DNS observability with a new FAILED_DNS event and safer data handling, and increased reliability of mount-related tests through MoveMountRecursivePropagation stabilization. These changes reduce memory pressure on nodes with many mounts, improve security auditing and data quality for DNS events, and lower CI flakiness, accelerating issue detection and resolution.
October 2025
September 2025
2 Commits • 1 Features
Sep 1, 2025September 2025: Focused on expanding mountpoint visibility and monitoring capabilities for DataDog/datadog-agent. Delivered new mountpoint coverage with move_mount support and modernized mount resolution via listmount and statmount, replacing the procfs-based resolver to improve visibility, accuracy, and synchronization speed. The changes increase coverage and reliability of mount monitoring across hosts and containers, enabling faster detection and alerting on mount-related issues. No major bugs fixed were documented this month.
September 2025
2 Commits • 1 Features
Sep 1, 2025September 2025: Focused on expanding mountpoint visibility and monitoring capabilities for DataDog/datadog-agent. Delivered new mountpoint coverage with move_mount support and modernized mount resolution via listmount and statmount, replacing the procfs-based resolver to improve visibility, accuracy, and synchronization speed. The changes increase coverage and reliability of mount monitoring across hosts and containers, enabling faster detection and alerting on mount-related issues. No major bugs fixed were documented this month.
July 2025
3 Commits • 1 Features
Jul 1, 2025In July 2025, contributions to the DataDog/datadog-agent focused on improving filesystem monitoring, test reliability, and error visibility. Delivered the open_tree syscall-based mount monitoring feature, hardened tests for ebpfless scenarios, and improved error handling/logging for mount attribute resolution, with corresponding docs and tests.
3 Commits • 1 Features
Jul 1, 2025In July 2025, contributions to the DataDog/datadog-agent focused on improving filesystem monitoring, test reliability, and error visibility. Delivered the open_tree syscall-based mount monitoring feature, hardened tests for ebpfless scenarios, and improved error handling/logging for mount attribute resolution, with corresponding docs and tests.
July 2025
June 2025
1 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for DataDog/datadog-agent. Key feature delivered: Cloud Workload Security (CWS) fsmount syscall support, enabling accurate monitoring and enforcement of mount operations by capturing detailed information about new mount points. This work includes documentation and test coverage updates to ensure proper integration and reliability. A notable bug fix addressed an issue with runc init path resolution during the fsmount integration. Impact: Improves security visibility and control over containerized workloads, enabling quicker detection and response to mount-related risks. This contributes to stronger policy enforcement, better compliance telemetry, and reduced blast radius in production environments. Accomplishments: Implemented the fsmount syscall in CWS for DataDog-agent (commit 8a2382d4193d04848a297bb3e229a78d94320df8), fixed runc init path resolution as part of the feature, expanded test coverage, and updated documentation to reflect new observability and usage. Technologies/skills demonstrated: syscall instrumentation, Cloud Workload Security integration, secure telemetry, end-to-end validation (development, tests, docs), code quality improvements, and cross-functional collaboration to ensure proper ground-truth data and test scenarios.
June 2025
1 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for DataDog/datadog-agent. Key feature delivered: Cloud Workload Security (CWS) fsmount syscall support, enabling accurate monitoring and enforcement of mount operations by capturing detailed information about new mount points. This work includes documentation and test coverage updates to ensure proper integration and reliability. A notable bug fix addressed an issue with runc init path resolution during the fsmount integration. Impact: Improves security visibility and control over containerized workloads, enabling quicker detection and response to mount-related risks. This contributes to stronger policy enforcement, better compliance telemetry, and reduced blast radius in production environments. Accomplishments: Implemented the fsmount syscall in CWS for DataDog-agent (commit 8a2382d4193d04848a297bb3e229a78d94320df8), fixed runc init path resolution as part of the feature, expanded test coverage, and updated documentation to reflect new observability and usage. Technologies/skills demonstrated: syscall instrumentation, Cloud Workload Security integration, secure telemetry, end-to-end validation (development, tests, docs), code quality improvements, and cross-functional collaboration to ensure proper ground-truth data and test scenarios.
May 2025
4 Commits • 1 Features
May 1, 2025May 2025 monthly summary for DataDog/datadog-agent: Delivered DNS Response Events and Processing Enhancements and fixed non-blocking connect event recording (EINPROGRESS), improving observability, reliability, and data quality for DNS and network instrumentation. Implementations included NXDOMAIN capture, improved packet processing (discard truncated messages, handle oversized packets), updated data structures and docs, and added tests to validate behavior.
4 Commits • 1 Features
May 1, 2025May 2025 monthly summary for DataDog/datadog-agent: Delivered DNS Response Events and Processing Enhancements and fixed non-blocking connect event recording (EINPROGRESS), improving observability, reliability, and data quality for DNS and network instrumentation. Implementations included NXDOMAIN capture, improved packet processing (discard truncated messages, handle oversized packets), updated data structures and docs, and added tests to validate behavior.
May 2025
March 2025
5 Commits • 1 Features
Mar 1, 2025Concise monthly summary for 2025-03: Delivered targeted DNS processing enhancements and hostname resolution within DataDog/datadog-agent's Cloud Workload Security (CWS), enriching network event data with hostname context and improving DNS packet handling reliability. Implemented testing for CNAME resolution and reduced noisy DNS error messages to boost data quality and signal clarity. Fixed hostname data source in AcceptEventSerializer to ensure Hostnames are serialized from e.Accept.Hostnames (not e.Connect.Hostnames), eliminating data origin ambiguity. These changes collectively improve security analytics fidelity, incident response speed, and overall reliability of DNS-related telemetry.
March 2025
5 Commits • 1 Features
Mar 1, 2025Concise monthly summary for 2025-03: Delivered targeted DNS processing enhancements and hostname resolution within DataDog/datadog-agent's Cloud Workload Security (CWS), enriching network event data with hostname context and improving DNS packet handling reliability. Implemented testing for CNAME resolution and reduced noisy DNS error messages to boost data quality and signal clarity. Fixed hostname data source in AcceptEventSerializer to ensure Hostnames are serialized from e.Accept.Hostnames (not e.Connect.Hostnames), eliminating data origin ambiguity. These changes collectively improve security analytics fidelity, incident response speed, and overall reliability of DNS-related telemetry.
February 2025
1 Commits • 1 Features
Feb 1, 2025February 2025 monthly summary for DataDog/datadog-agent: Delivered System Probe: Network Ingress Enablement by toggling the system probe configuration from false to true, activating a previously defined network ingress feature. This enables network ingress processing, improving visibility, control, and observability of ingress traffic. The change is tracked in a focused commit and aligns with the roadmap to provide toggle-driven enablement for critical network features.
1 Commits • 1 Features
Feb 1, 2025February 2025 monthly summary for DataDog/datadog-agent: Delivered System Probe: Network Ingress Enablement by toggling the system probe configuration from false to true, activating a previously defined network ingress feature. This enables network ingress processing, improving visibility, control, and observability of ingress traffic. The change is tracked in a focused commit and aligns with the roadmap to provide toggle-driven enablement for critical network features.
February 2025
January 2025
2 Commits • 2 Features
Jan 1, 2025January 2025 monthly summary for DataDog/datadog-agent: Delivered two major features enhancing security observability and network visibility. (1) Cloud Workload Security: Accept syscall event monitoring added, with capture of accept syscall events and corresponding updates to EBPF probes, event models, tests, and documentation. (2) Network event handling in EBPF-less mode added, covering socket, accept, connect, and bind syscalls, with model definitions, probe handling, network-specific handlers, and tests. No major bugs fixed this month; feature work included necessary test and docs refinements. Impact: improved visibility into network connections and bindings across kernel-trace and ebpfless environments, enabling earlier threat detection and stronger security posture. Technologies/skills demonstrated: CWS, EBPF, ebpfless architecture, network syscall/event modeling, probe development, test automation, and documentation.
January 2025
2 Commits • 2 Features
Jan 1, 2025January 2025 monthly summary for DataDog/datadog-agent: Delivered two major features enhancing security observability and network visibility. (1) Cloud Workload Security: Accept syscall event monitoring added, with capture of accept syscall events and corresponding updates to EBPF probes, event models, tests, and documentation. (2) Network event handling in EBPF-less mode added, covering socket, accept, connect, and bind syscalls, with model definitions, probe handling, network-specific handlers, and tests. No major bugs fixed this month; feature work included necessary test and docs refinements. Impact: improved visibility into network connections and bindings across kernel-trace and ebpfless environments, enabling earlier threat detection and stronger security posture. Technologies/skills demonstrated: CWS, EBPF, ebpfless architecture, network syscall/event modeling, probe development, test automation, and documentation.
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Quality Metrics
Correctness90.6%
Maintainability85.8%
Architecture84.8%
Performance81.4%
AI Usage21.0%
Skills & Technologies
Programming Languages
AssemblyCGoJSONMarkdownShell
Technical Skills
Backend DevelopmentBug FixCC DevelopmentC programmingConfiguration ManagementData SerializationDebuggingDocumentationError HandlingEvent HandlingGoGo DevelopmentGo programmingKernel Development
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