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LWN.net

[$] Tracking when BPF programs may sleep

BPF programs can run in both sleepable and non-sleepable (atomic) contexts. Currently, sleepable BPF programs are not allowed to enter an atomic context. Puranjay Mohan has a new patch set that changes that. The patch set would let BPF programs called in sleepable contexts temporarily acquire locks that cause the programs to transition to an atomic context. BPF maintainer Alexei Starovoitov objected to parts of the implementation, however, so acceptance of the patch depends on whether Mohan is willing and able to straighten it out.

LWN.net

Kernel prepatch 7.0-rc5

Linus has released 7.0-rc5 for testing. "It looks like things are starting to calm down - rc5 is smaller than the previous rc's this merge window, although it still tracks a bit larger than rc5s historically do."