[ploxiln]

• Retry fallocate() when it fails with EINTR.
• Retry the fallback ftruncate() path when it fails with EINTR.
• Preserve existing EOPNOTSUPP fallback and permanent-error handling.
• Add a deterministic regression test using one-shot EINTR syscall hooks.
• Bound KAIO truncate EINTR retries and isolate regression tests

---

backport of #14081

[ploxiln]

100k joshua test:

{
  "id": "20261020-024757-pierce-8cc81f52825c226f",
  "duration": 3752267,
  "ended": 101000,
  "fail": 1,
  "pass": 100999,
  "started": 101000,
  "compressed": true,
  "data_size": 40930129,
  "fail_fast": 10,
  "max_runs": 101000,
  "priority": 100,
  "runtime": "0:53:49",
  "sanity": false,
  "stopped": "20261020-034146",
  "submitted": "20261020-024757",
  "timeout": 5400,
  "username": "pierce",
  "remaining": "0"
}

One failure seemingly unrelated:

fdbserver -r simulation --crash --logsize 1024MB -f src/foundationdb/tests/fast/NativeCdcLargeVersionBatching.toml --buggify off --seed 2876491692

running test (NativeCdcLargeVersionBatching)...
NativeCdcEndToEnd complete
NativeCdcEndToEnd complete
NativeCdcEndToEnd complete
Assertion sawBatchedPrimingReply failed @ /root/src/foundationdb/fdbserver/workloads/NativeCdcEndToEnd.cpp 2474:
  /usr/local/bin/llvm-addr2line -e ./build_output/bin/fdbserver -p -C -f -i 0x57aa9cb 0x1ff4482 0x1fa6061 0x2056f48 0x2056e2d 0x449fa51 0x1ff7591 0x1ff70e1 0x20d3458 0x20d3341 0x20d4188 0x20d3f4a 0x4fb42a9 0x4fc198c 0x17e9fd8 0x50dcd87 0x50dc8b0 0x181012e 0x7fe8166fc610
SIGNAL: Aborted (6)

That addr2line backtrace is a bit hard for me to decipher, it's a bunch of promise resolution functions inlined in coroutine .resume methods ... but it's this assertion:

foundationdb/fdbserver/workloads/NativeCdcEndToEnd.cpp

Line 2474 in 457bc22

ASSERT(sawBatchedPrimingReply);

[foundationdb-ci]

Result of foundationdb-pr-macos-m1 on macOS 14.x

• Commit ID: d38968f
• Duration 0:33:05
• Result: ✅ SUCCEEDED
• Error: N/A
• Build Log terminal output (available for 30 days)
• Build Workspace zip file of the working directory (available for 30 days)

[foundationdb-ci]

Result of foundationdb-pr-clang on Linux RHEL 9

• Commit ID: d38968f
• Duration 0:39:23
• Result: ✅ SUCCEEDED
• Error: N/A
• Build Log terminal output (available for 30 days)
• Build Workspace zip file of the working directory (available for 30 days)

[foundationdb-ci]

Result of foundationdb-pr on Linux RHEL 9

• Commit ID: d38968f
• Duration 0:46:50
• Result: ✅ SUCCEEDED
• Error: N/A
• Build Log terminal output (available for 30 days)
• Build Workspace zip file of the working directory (available for 30 days)

[foundationdb-ci]

Result of foundationdb-pr-clang-arm on Linux RHEL 9

• Commit ID: d38968f
• Duration 0:47:15
• Result: ✅ SUCCEEDED
• Error: N/A
• Build Log terminal output (available for 30 days)
• Build Workspace zip file of the working directory (available for 30 days)

[foundationdb-ci]

Result of foundationdb-pr-cluster-tests on Linux RHEL 9

• Commit ID: d38968f
• Duration 1:38:07
• Result: ✅ SUCCEEDED
• Error: N/A
• Build Log terminal output (available for 30 days)
• Build Workspace zip file of the working directory (available for 30 days)
• Cluster Test Logs zip file of the test logs (available for 30 days)

[foundationdb-ci]

Result of foundationdb-pr-macos on macOS 14.x

• Commit ID: d38968f
• Duration 2:10:09
• Result: ✅ SUCCEEDED
• Error: N/A
• Build Log terminal output (available for 30 days)
• Build Workspace zip file of the working directory (available for 30 days)