[31.x] Finalise 31.2 #36661

1. 
   fanquake commented at 12:52 PM on October 26, 2026: member

   Backports:

   • #36665
   • #36667
   • #36669
2. fanquake added this to the milestone 31.2 on Oct 26, 2026
3. DrahtBot added the label Backport on Oct 26, 2026
4. 
   DrahtBot commented at 12:52 PM on October 26, 2026: contributor

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   External sites

   • Code coverage & benchmarks: https://corecheck.dev/bitcoin/bitcoin/pulls/36661
   • Ralph review <img src=https://review.fish.foo/assets/bitcoin/bitcoin/36661.png alt="Ralph review status"> https://git.fish.foo/bitcoin/bitcoin/pulls/36661#author-ralph

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5. fanquake force-pushed on Oct 26, 2026
6. build: bump version to v31.2 cfde8285f9
7. doc: update manual pages for v31.2 30ce1db0b4
8. doc: update example bitcoin.conf for v31.2 a48dd277ed
9. sock: align exception monitoring between poll() and select() backends

   Github-Pull: #36665
   Rebased-From: 1e0c407377034e9cbb4d52f1f534c06cdf202a36

   9918ecdc06
10. fanquake force-pushed on Oct 26, 2026
11. net: enforce timeout interval for paused send peers

    No need to waste a connection slot on a peer that is so slow to read as to not
    drain our send buffer down to the 1MB threshold within 20 minutes.
    
    Github-Pull: #36667
    Rebased-From: cc2534cdf7b14d0f1a18928ebaab7f7fdd7e839e

    18f8c1695e
12. flatfile: store position as a 64 bits integer

    This is the last field that is only bounded by the usage callers make of it
    (unlike the file number, for instance). Promoting it to a 64 bits integer also
    does not change on-disk representation since we serialize positions as varints.
    Therefore, widen them to prevent any possible future misuse.
    
    Github-Pull: #36669
    Rebased-From: 17556cb1f52fcbc807f65245101f72e8ec1573d8

    d47e0d7e24
13. flatfile: use 64-bit file positioning syscalls in Windows

    Github-Pull: #36669
    Rebased-From: 48092a9042d8fcfd6bb7ae5911a1d53b8746d546

    307fbeeaf4
14. doc: update release notes for v31.2 de4a5e34b1
15. fanquake force-pushed on Oct 26, 2026
16. DrahtBot added the label CI failed on Oct 26, 2026
17. fanquake marked this as ready for review on Oct 26, 2026
18. 
    instagibbs commented at 5:57 PM on October 26, 2026: member

    ACK https://github.com/bitcoin/bitcoin/pull/36661/commits/de4a5e34b1a421a4c78873ae657b27d7ab835293

19. l0rinc approved
20. 
    l0rinc commented at 5:59 PM on October 26, 2026: contributor

    ACK de4a5e34b1a421a4c78873ae657b27d7ab835293

    Reviewed all four cherry-picks manually and checked the remaining commits automatically. The differences from upstream are the older socket event names, clock and logging APIs, and keeping the existing rounding arithmetic.

Milestone
31.2