Fix race in prefetch where the same page is selected by two threads

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      format-stress-test-2 on ubuntu2004-stress-tests-arm64

      Host: i-043eb49ff62ef17ef
      Project: wiredtiger
      Commit: 19193476
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      Task Logs:

      format-stress-test-2 task_log

      Logs:

          [1756240504:780520][81484:0xffff881d8c40], t, file:T00001.wt, WT_CURSOR.next: [WT_VERB_DEFAULT][ERROR]: __wt_conn_prefetch_queue_push, 197: WiredTiger assertion failed: '!(__wt_atomic_load8(&((ref)->flags_atomic)) & (uint8_t)(0x1u))'. Expression returned false
    [1756240504:780550][81484:0xffff881d8c40], t, file:T00001.wt, WT_CURSOR.next: [WT_VERB_DEFAULT][ERROR]: __wt_abort, 29: aborting WiredTiger library

      logs

      format-stress-test-2 task_log

      Logs:

      test/format run configuration highlights

      logs

      format-stress-test-2 task_log

      Logs:

      #0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#1  0x0000ffff9958caac in __GI_abort () at abort.c:79
#2  0x0000ffff99901ac0 in __wt_abort (session=session@entry=0x30c43f615f00) at /data/mci/5c8115327ad96a4075a851e5b1d5077b/wiredtiger/src/os_common/os_abort.c:31
#3  0x0000ffff99860960 in __wt_conn_prefetch_queue_push (session=session@entry=0x30c43f615f00, ref=0x30c4233c1f40) at /data/mci/5c8115327ad96a4075a851e5b1d5077b/wiredtiger/src/conn/conn_prefetch.c:197
#4  0x0000ffff997e45e4 in __wti_btree_prefetch (session=session@entry=0x30c43f615f00, ref=0x30c436d70e60) at /data/mci/5c8115327ad96a4075a851e5b1d5077b/wiredtiger/src/btree/bt_prefetch.c:81
#5  0x0000ffff99819850 in __tree_walk_internal (session=session@entry=0x30c43f615f00, refp=refp@entry=0x30c4308f1fe0, walkcntp=walkcntp@entry=0x0, skip_func=skip_func@entry=0xffff997ad340 <__wt_btcur_skip_page>, func_cookie=func_cookie@entry=0xffff881d7b30, flags=3088, flags@entry=2064) at /data/mci/5c8115327ad96a4075a851e5b1d5077b/wiredtiger/src/btree/bt_walk.c:342
#6  0x0000ffff99819af0 in __wt_tree_walk_custom_skip (session=session@entry=0x30c43f615f00, refp=refp@entry=0x30c4308f1fe0, skip_func=skip_func@entry=0xffff997ad340 <__wt_btcur_skip_page>, func_cookie=func_cookie@entry=0xffff881d7b30, flags=flags@entry=2064) at /data/mci/5c8115327ad96a4075a851e5b1d5077b/wiredtiger/src/btree/bt_walk.c:431
#7  0x0000ffff997b12c4 in __wt_btcur_next (cbt=cbt@entry=0x30c4308f1e00, truncating=truncating@entry=false) at /data/mci/5c8115327ad96a4075a851e5b1d5077b/wiredtiger/src/btree/bt_curnext.c:951
#8  0x0000ffff99881e2c in __curfile_next (cursor=0x30c4308f1e00) at /data/mci/5c8115327ad96a4075a851e5b1d5077b/wiredtiger/src/cursor/cur_file.c:185
#9  0x000000000041b038 in read_op (cursor=cursor@entry=0x30c4308f1e00, op=op@entry=NEXT, exactp=exactp@entry=0x0) at /data/mci/5c8115327ad96a4075a851e5b1d5077b/wiredtiger/test/format/format_inline.h:45
#10 0x000000000041b3dc in table_mirror_row_next (table=table@entry=0x30c43fe32000, cursor=0x30c4308f1e00, key=key@entry=0xffff881d82e0, keynop=keynop@entry=0xffff881d8258) at /data/mci/5c8115327ad96a4075a851e5b1d5077b/wiredtiger/test/format/verify.c:68
#11 0x000000000041ba6c in table_verify_mirror (conn=conn@entry=0x30c43fe42f00, base=0x30c43fe32000, table=0x30c43fe36000, checkpoint=checkpoint@entry=0x0, tinfo=tinfo@entry=0x30c4223fbc00) at /data/mci/5c8115327ad96a4075a851e5b1d5077b/wiredtiger/test/format/verify.c:290
#12 0x000000000041c438 in wts_verify_mirrors (conn=0x30c43fe42f00, checkpoint=checkpoint@entry=0x0, tinfo=tinfo@entry=0x30c4223fbc00) at /data/mci/5c8115327ad96a4075a851e5b1d5077b/wiredtiger/test/format/verify.c:504
#13 0x000000000041c4b4 in wts_verify_mirrored_truncate (tinfo=tinfo@entry=0x30c4223fbc00) at /data/mci/5c8115327ad96a4075a851e5b1d5077b/wiredtiger/test/format/verify.c:481
#14 0x00000000004154e4 in ops (arg=0x30c4223fbc00) at /data/mci/5c8115327ad96a4075a851e5b1d5077b/wiredtiger/test/format/ops.c:1443
#15 0x0000ffff99712624 in start_thread (arg=0x414758 <ops>) at pthread_create.c:477
#16 0x0000ffff9963d66c in thread_start () at ../sysdeps/unix/sysv/linux/aarch64/clone.S:78

      logs

      Repro Artifacts:

            Assignee:
            Chenhao Qu
            Reporter:
            xgen-buildbaron-user
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              Created:
              Updated:
              Resolved: