Jonah H. Harris wrote: > PG doesn't care because during hint-bits aren't logged and during > normal WAL replay, the old page will be pulled from the WAL. I > believe what Tom is referring to is that the buffer PG sends to > write() can still be modified by way of SetHintBits between the time > smgrwrite is called and the time the actual write takes place, which > is why we can't rely on a checksum of the buffer pointer passed to > smgrwrite and friends. > > If we're double-buffering the write, I don't see where we could be > introducing a torn-page, as we'd actually be writing a copied version > of the buffer. Will look into this.
The torn page is during kernel write to disk, I assume, so it is still possible. -- Bruce Momjian <[EMAIL PROTECTED]> http://momjian.us EnterpriseDB http://enterprisedb.com + If your life is a hard drive, Christ can be your backup. + -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
