tag

#syscalls

2 posts

LinuxDeep Dive October 3, 2026 8 min read

Linux Futexes in Practice: Compare-and-Block, Wakeups, and Lost-Wake Prevention

Understand Linux futex wait and wake contracts, private versus shared keys, spurious returns, memory ordering, and safe synchronization tests.

#linux#futex#synchronization

LinuxDeep Dive October 2, 2026 5 min read

Learn what Linux memfd_secret protects, how its file-descriptor and mapping lifecycle works, and where its security guarantees stop.

#linux#memory#security