pgsql: Rearrange mdsync() looping logic to avoid the problem that a

From: tgl(at)postgresql(dot)org (Tom Lane)
To: pgsql-committers(at)postgresql(dot)org
Subject: pgsql: Rearrange mdsync() looping logic to avoid the problem that a
Date: 2007-04-12 17:11:00
Message-ID: 20070412171100.96B3B9FA399@postgresql.org
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-committers

Log Message:
-----------
Rearrange mdsync() looping logic to avoid the problem that a sufficiently
fast flow of new fsync requests can prevent mdsync() from ever completing.
This was an unforeseen consequence of a patch added in Mar 2006 to prevent
the fsync request queue from overflowing. Problem identified by Heikki
Linnakangas and independently by ITAGAKI Takahiro; fix based on ideas from
Takahiro-san, Heikki, and Tom.

Back-patch as far as 8.1 because a previous back-patch introduced the problem
into 8.1 ...

Tags:
----
REL8_2_STABLE

Modified Files:
--------------
pgsql/src/backend/storage/smgr:
md.c (r1.123.2.1 -> r1.123.2.2)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/storage/smgr/md.c.diff?r1=1.123.2.1&r2=1.123.2.2)

Browse pgsql-committers by date

  From Date Subject
Next Message Tom Lane 2007-04-12 17:11:07 pgsql: Rearrange mdsync() looping logic to avoid the problem that a
Previous Message Tom Lane 2007-04-12 17:10:55 pgsql: Rearrange mdsync() looping logic to avoid the problem that a