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pgsql: Add a check to prevent overwriting valid data if smgrnblocks() - Mailing list pgsql-committers

From tgl@postgresql.org (Tom Lane)
Subject pgsql: Add a check to prevent overwriting valid data if smgrnblocks()
Date
Msg-id 20060925220110.76B6A9FB251@postgresql.org
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Log Message:
-----------
Add a check to prevent overwriting valid data if smgrnblocks() gives a
wrong answer, as has been seen to occur with a buggy Linux kernel.  Not
really our bug, but it's a simple test in a seldom-used control path,
so might as well have a defense.

Modified Files:
--------------
    pgsql/src/backend/storage/buffer:
        bufmgr.c (r1.210 -> r1.211)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/storage/buffer/bufmgr.c.diff?r1=1.210&r2=1.211)

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