[WIP] Use fetch_max instead of bump_atomic_lsn

[Yam76]

The relevant part of issue rust-lang/rust#48655 was resolved in rust-lang/rust#72324 so this PR should eventually fix the corresponding TODO in pagecache.

This initial PR does some of the grind work of replacing bump_atomic_lsn.

NOTE: I'm not familiar with Rust's atomics, so I don't know if SeqCst is actually what you want.

For cargo test, my OS (Windows 10, WSL) couldn't hole punch the heap, and I got a lot of 60 second timeouts. Also, the tests got stuck on my end at around tree_bug_39, so I had to kill the process. It might be better on your end.

[spacejam]

Hey @Yam76, this is explicitly avoiding fetch_max which did not stabilize until Rust 1.45. sled is currently targeting 1.39 as the minimum supported rust version (MSRV).

[Yam76]

D'oh, that's what I get for not reading the full README. Thank you for the response.

[spacejam]

Thanks for putting in the effort anyway! :)

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On Sat, Jan 2, 2021, 06:53 Yam76 ***@***.***> wrote: D'oh, that's what I get for not reading the full README. Thanks for the response. — You are receiving this because you modified the open/close state. Reply to this email directly, view it on GitHub <#1233 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AALPRUAGHNNJHHFDCZ6NZTTSX2YHNANCNFSM4VP4MZ5Q> .