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Reword some unclear comments

This commit is contained in:
Alvaro Herrera 2017-08-08 18:46:16 -04:00
parent f5d54ef97a
commit 77d2c00af7
1 changed files with 4 additions and 3 deletions
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7
src/backend/access/heap/heapam.c
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@ -3983,7 +3983,7 @@ l2:
/*
* To prevent concurrent sessions from updating the tuple, we have to
* temporarily mark it locked, while we release the lock.
* temporarily mark it locked, while we release the page-level lock.
*
* To satisfy the rule that any xid potentially appearing in a buffer
* written out to disk, we unfortunately have to WAL log this
@ -3995,8 +3995,9 @@ l2:
/*
* Compute xmax / infomask appropriate for locking the tuple. This has
* to be done separately from the lock, because the potentially
* created multixact would otherwise be wrong.
* to be done separately from the combo that's going to be used for
* updating, because the potentially created multixact would otherwise
* be wrong.
*/
compute_new_xmax_infomask(HeapTupleHeaderGetRawXmax(oldtup.t_data),
oldtup.t_data->t_infomask,