From edf24e7afc2417ecf9b496ef672a0447e8723e23 Mon Sep 17 00:00:00 2001
From: Christian Schwarz <me@cschwarz.com>
Date: Wed, 4 Oct 2023 15:54:57 +0000
Subject: [PATCH] Revert "yield to executor every time we move backwards"

This reverts commit 49bf66a467492f05d40b57c428cbe0f521917502.
---
 pageserver/src/page_cache.rs | 14 +-------------
 1 file changed, 1 insertion(+), 13 deletions(-)

diff --git a/pageserver/src/page_cache.rs b/pageserver/src/page_cache.rs
index c5c85aa5cb..8e25fe04cf 100644
--- a/pageserver/src/page_cache.rs
+++ b/pageserver/src/page_cache.rs
@@ -884,21 +884,9 @@ impl PageCache {
     ) -> anyhow::Result<(usize, tokio::sync::RwLockWriteGuard<SlotInner>)> {
         let iter_limit = self.slots.len() * 10;
         let mut iters = 0;
-        let mut last_slot_idx = None;
         loop {
             iters += 1;
-            let slot_idx = {
-                let next_idx =
-                    self.next_evict_slot.fetch_add(1, Ordering::Relaxed) % self.slots.len();
-                match (last_slot_idx, next_idx) {
-                    (Some(x), y) if x > y => {
-                        tokio::task::yield_now().await;
-                    }
-                    (None | Some(_), _) => {}
-                }
-                last_slot_idx = Some(next_idx);
-                next_idx
-            };
+            let slot_idx = self.next_evict_slot.fetch_add(1, Ordering::Relaxed) % self.slots.len();
 
             let slot = &self.slots[slot_idx];