mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-08-25 17:27:19 +02:00
459 lines
17 KiB
Plaintext
459 lines
17 KiB
Plaintext
From pgsql-bugs-owner+M14436@postgresql.org Tue Feb 21 22:21:37 2006
|
|
Return-path: <pgsql-bugs-owner+M14436@postgresql.org>
|
|
Received: from ams.hub.org (ams.hub.org [200.46.204.13])
|
|
by candle.pha.pa.us (8.11.6/8.11.6) with ESMTP id k1M3La514372
|
|
for <pgman@candle.pha.pa.us>; Tue, 21 Feb 2006 22:21:37 -0500 (EST)
|
|
Received: from postgresql.org (postgresql.org [200.46.204.71])
|
|
by ams.hub.org (Postfix) with ESMTP id 3F65267B6A8
|
|
for <pgman@candle.pha.pa.us>; Tue, 21 Feb 2006 23:21:32 -0400 (AST)
|
|
X-Original-To: pgsql-bugs-postgresql.org@localhost.postgresql.org
|
|
Received: from localhost (av.hub.org [200.46.204.144])
|
|
by postgresql.org (Postfix) with ESMTP id 39FB99DCBE3
|
|
for <pgsql-bugs-postgresql.org@localhost.postgresql.org>; Tue, 21 Feb 2006 23:21:08 -0400 (AST)
|
|
Received: from postgresql.org ([200.46.204.71])
|
|
by localhost (av.hub.org [200.46.204.144]) (amavisd-new, port 10024)
|
|
with ESMTP id 11699-01
|
|
for <pgsql-bugs-postgresql.org@localhost.postgresql.org>;
|
|
Tue, 21 Feb 2006 23:21:12 -0400 (AST)
|
|
X-Greylist: from auto-whitelisted by SQLgrey-
|
|
Received: from floppy.pyrenet.fr (news.pyrenet.fr [194.116.145.2])
|
|
by postgresql.org (Postfix) with ESMTP id 271CB9DCABD
|
|
for <pgsql-bugs@postgresql.org>; Tue, 21 Feb 2006 23:21:05 -0400 (AST)
|
|
Received: by floppy.pyrenet.fr (Postfix, from userid 106)
|
|
id 90AFD30BB2; Wed, 22 Feb 2006 04:21:09 +0100 (MET)
|
|
From: "Qingqing Zhou" <zhouqq@cs.toronto.edu>
|
|
X-Newsgroups: pgsql.bugs
|
|
Subject: [BUGS] FATAL: semctl(1672698088, 12, SETVAL, 0) failed
|
|
Date: Wed, 22 Feb 2006 11:17:51 +0800
|
|
Organization: Hub.Org Networking Services
|
|
Lines: 50
|
|
Message-ID: <dtglar$15tv$1@news.hub.org>
|
|
X-Complaints-To: usenet@news.hub.org
|
|
X-Priority: 3
|
|
X-MSMail-Priority: Normal
|
|
X-Newsreader: Microsoft Outlook Express 6.00.2800.1506
|
|
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1506
|
|
To: pgsql-bugs@postgresql.org
|
|
X-Virus-Scanned: by amavisd-new at hub.org
|
|
X-Spam-Status: No, score=0.16 required=5 tests=[AWL=0.160]
|
|
X-Spam-Score: 0.16
|
|
X-Mailing-List: pgsql-bugs
|
|
List-Archive: <http://archives.postgresql.org/pgsql-bugs>
|
|
List-Help: <mailto:majordomo@postgresql.org?body=help>
|
|
List-Id: <pgsql-bugs.postgresql.org>
|
|
List-Owner: <mailto:pgsql-bugs-owner@postgresql.org>
|
|
List-Post: <mailto:pgsql-bugs@postgresql.org>
|
|
List-Subscribe: <mailto:majordomo@postgresql.org?body=sub%20pgsql-bugs>
|
|
List-Unsubscribe: <mailto:majordomo@postgresql.org?body=unsub%20pgsql-bugs>
|
|
Precedence: bulk
|
|
Sender: pgsql-bugs-owner@postgresql.org
|
|
Status: ROr
|
|
|
|
I encountered an error when I fast shutdown 8.1.1 on Win2k:
|
|
|
|
FATAL: semctl(1672698088, 12, SETVAL, 0) failed: A blocking operation
|
|
was interrupted by a call to WSACancelBlockingCall.
|
|
|
|
A similar error on 8.1/win2003 was reported on pgsql-general (sorry, I can't
|
|
dig out the
|
|
original post from our web archives):
|
|
|
|
From: Niederland
|
|
Date: Tues, Dec 13 2005 9:49 am
|
|
|
|
2005-12-12 20:30:00 FATAL: semctl(50884184, 15, SETVAL, 0) failed: A
|
|
non-blocking socket operation could not be completed immediately.
|
|
|
|
---
|
|
|
|
There are two problems here:
|
|
|
|
(1) Why a socket error?
|
|
In port/win32.h, we have
|
|
|
|
#undef EAGAIN
|
|
#undef EINTR
|
|
#define EINTR WSAEINTR
|
|
#define EAGAIN WSAEWOULDBLOCK
|
|
|
|
What's the rationale of doing so?
|
|
|
|
(2) What's happened here?
|
|
It may come from PGSemaphoreReset(), and win32 semop() looks like this:
|
|
|
|
ret = WaitForMultipleObjectsEx(2, wh, FALSE, (sops[0].sem_flg &
|
|
IPC_NOWAIT) ? 0 : INFINITE, TRUE);
|
|
...
|
|
else if (ret == WAIT_OBJECT_0 + 1 || ret == WAIT_IO_COMPLETION)
|
|
{
|
|
pgwin32_dispatch_queued_signals();
|
|
errno = EINTR;
|
|
}
|
|
else if (ret == WAIT_TIMEOUT)
|
|
errno = EAGAIN;
|
|
|
|
So it seems the EINTR is caused by an incoming signal, the EAGAIN is caused
|
|
by a TIMEOUT ... any ideas?
|
|
|
|
Regards,
|
|
Qingqing
|
|
|
|
|
|
|
|
---------------------------(end of broadcast)---------------------------
|
|
TIP 9: In versions below 8.0, the planner will ignore your desire to
|
|
choose an index scan if your joining column's datatypes do not
|
|
match
|
|
|
|
From pgsql-bugs-owner+M14482@postgresql.org Tue Feb 28 14:05:23 2006
|
|
Return-path: <pgsql-bugs-owner+M14482@postgresql.org>
|
|
Received: from ams.hub.org (ams.hub.org [200.46.204.13])
|
|
by candle.pha.pa.us (8.11.6/8.11.6) with ESMTP id k1SJ5Mk19122
|
|
for <pgman@candle.pha.pa.us>; Tue, 28 Feb 2006 14:05:22 -0500 (EST)
|
|
Received: from postgresql.org (postgresql.org [200.46.204.71])
|
|
by ams.hub.org (Postfix) with ESMTP id A3FB567B7BF
|
|
for <pgman@candle.pha.pa.us>; Tue, 28 Feb 2006 15:05:20 -0400 (AST)
|
|
X-Original-To: pgsql-bugs-postgresql.org@localhost.postgresql.org
|
|
Received: from localhost (av.hub.org [200.46.204.144])
|
|
by postgresql.org (Postfix) with ESMTP id DB1559DCB49
|
|
for <pgsql-bugs-postgresql.org@localhost.postgresql.org>; Tue, 28 Feb 2006 15:05:04 -0400 (AST)
|
|
Received: from postgresql.org ([200.46.204.71])
|
|
by localhost (av.hub.org [200.46.204.144]) (amavisd-new, port 10024)
|
|
with ESMTP id 86421-08
|
|
for <pgsql-bugs-postgresql.org@localhost.postgresql.org>;
|
|
Tue, 28 Feb 2006 15:05:04 -0400 (AST)
|
|
X-Greylist: from auto-whitelisted by SQLgrey-
|
|
Received: from candle.pha.pa.us (candle.pha.pa.us [70.90.9.53])
|
|
by postgresql.org (Postfix) with ESMTP id 16D669DCAA8
|
|
for <pgsql-bugs@postgresql.org>; Tue, 28 Feb 2006 15:05:01 -0400 (AST)
|
|
Received: (from pgman@localhost)
|
|
by candle.pha.pa.us (8.11.6/8.11.6) id k1SJ52b19021;
|
|
Tue, 28 Feb 2006 14:05:02 -0500 (EST)
|
|
From: Bruce Momjian <pgman@candle.pha.pa.us>
|
|
Message-ID: <200602281905.k1SJ52b19021@candle.pha.pa.us>
|
|
Subject: Re: [BUGS] FATAL: semctl(1672698088, 12, SETVAL, 0) failed
|
|
In-Reply-To: <dtglar$15tv$1@news.hub.org>
|
|
To: Qingqing Zhou <zhouqq@cs.toronto.edu>
|
|
Date: Tue, 28 Feb 2006 14:05:02 -0500 (EST)
|
|
cc: pgsql-bugs@postgresql.org
|
|
X-Mailer: ELM [version 2.4ME+ PL121 (25)]
|
|
MIME-Version: 1.0
|
|
Content-Transfer-Encoding: 7bit
|
|
Content-Type: text/plain; charset=US-ASCII
|
|
X-Virus-Scanned: by amavisd-new at hub.org
|
|
X-Spam-Status: No, score=0.4 required=5 tests=[AWL=-0.100, RAZOR2_CHECK=0.5]
|
|
X-Spam-Score: 0.4
|
|
X-Mailing-List: pgsql-bugs
|
|
List-Archive: <http://archives.postgresql.org/pgsql-bugs>
|
|
List-Help: <mailto:majordomo@postgresql.org?body=help>
|
|
List-Id: <pgsql-bugs.postgresql.org>
|
|
List-Owner: <mailto:pgsql-bugs-owner@postgresql.org>
|
|
List-Post: <mailto:pgsql-bugs@postgresql.org>
|
|
List-Subscribe: <mailto:majordomo@postgresql.org?body=sub%20pgsql-bugs>
|
|
List-Unsubscribe: <mailto:majordomo@postgresql.org?body=unsub%20pgsql-bugs>
|
|
Precedence: bulk
|
|
Sender: pgsql-bugs-owner@postgresql.org
|
|
Status: RO
|
|
|
|
Qingqing Zhou wrote:
|
|
> I encountered an error when I fast shutdown 8.1.1 on Win2k:
|
|
>
|
|
> FATAL: semctl(1672698088, 12, SETVAL, 0) failed: A blocking operation
|
|
> was interrupted by a call to WSACancelBlockingCall.
|
|
>
|
|
> A similar error on 8.1/win2003 was reported on pgsql-general (sorry, I can't
|
|
> dig out the
|
|
> original post from our web archives):
|
|
>
|
|
> From: Niederland
|
|
> Date: Tues, Dec 13 2005 9:49 am
|
|
>
|
|
> 2005-12-12 20:30:00 FATAL: semctl(50884184, 15, SETVAL, 0) failed: A
|
|
> non-blocking socket operation could not be completed immediately.
|
|
>
|
|
> ---
|
|
>
|
|
> There are two problems here:
|
|
>
|
|
> (1) Why a socket error?
|
|
> In port/win32.h, we have
|
|
>
|
|
> #undef EAGAIN
|
|
> #undef EINTR
|
|
> #define EINTR WSAEINTR
|
|
> #define EAGAIN WSAEWOULDBLOCK
|
|
>
|
|
> What's the rationale of doing so?
|
|
|
|
We did this so that our code could refer to EINTR/EAGAIN without
|
|
port-specific tests.
|
|
|
|
> (2) What's happened here?
|
|
> It may come from PGSemaphoreReset(), and win32 semop() looks like this:
|
|
>
|
|
> ret = WaitForMultipleObjectsEx(2, wh, FALSE, (sops[0].sem_flg &
|
|
> IPC_NOWAIT) ? 0 : INFINITE, TRUE);
|
|
> ...
|
|
> else if (ret == WAIT_OBJECT_0 + 1 || ret == WAIT_IO_COMPLETION)
|
|
> {
|
|
> pgwin32_dispatch_queued_signals();
|
|
> errno = EINTR;
|
|
> }
|
|
> else if (ret == WAIT_TIMEOUT)
|
|
> errno = EAGAIN;
|
|
>
|
|
> So it seems the EINTR is caused by an incoming signal, the EAGAIN is caused
|
|
> by a TIMEOUT ... any ideas?
|
|
|
|
I looked at the documentation for the function:
|
|
|
|
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dllproc/base/waitformultipleobjectsex.asp
|
|
|
|
and it isn't clear what return failure values it has. We certainly
|
|
could loop on WSAEINTR. Can you test it?
|
|
|
|
--
|
|
Bruce Momjian http://candle.pha.pa.us
|
|
SRA OSS, Inc. http://www.sraoss.com
|
|
|
|
+ If your life is a hard drive, Christ can be your backup. +
|
|
|
|
---------------------------(end of broadcast)---------------------------
|
|
TIP 3: Have you checked our extensive FAQ?
|
|
|
|
http://www.postgresql.org/docs/faq
|
|
|
|
From pgsql-bugs-owner+M14483@postgresql.org Tue Feb 28 21:12:39 2006
|
|
Return-path: <pgsql-bugs-owner+M14483@postgresql.org>
|
|
Received: from ams.hub.org (ams.hub.org [200.46.204.13])
|
|
by candle.pha.pa.us (8.11.6/8.11.6) with ESMTP id k212Cdk24423
|
|
for <pgman@candle.pha.pa.us>; Tue, 28 Feb 2006 21:12:39 -0500 (EST)
|
|
Received: from postgresql.org (postgresql.org [200.46.204.71])
|
|
by ams.hub.org (Postfix) with ESMTP id 2D9CF67B7CA
|
|
for <pgman@candle.pha.pa.us>; Tue, 28 Feb 2006 22:12:36 -0400 (AST)
|
|
X-Original-To: pgsql-bugs-postgresql.org@localhost.postgresql.org
|
|
Received: from localhost (av.hub.org [200.46.204.144])
|
|
by postgresql.org (Postfix) with ESMTP id D8B0B9DC837
|
|
for <pgsql-bugs-postgresql.org@localhost.postgresql.org>; Tue, 28 Feb 2006 22:12:17 -0400 (AST)
|
|
Received: from postgresql.org ([200.46.204.71])
|
|
by localhost (av.hub.org [200.46.204.144]) (amavisd-new, port 10024)
|
|
with ESMTP id 65124-06
|
|
for <pgsql-bugs-postgresql.org@localhost.postgresql.org>;
|
|
Tue, 28 Feb 2006 22:12:21 -0400 (AST)
|
|
X-Greylist: from auto-whitelisted by SQLgrey-
|
|
Received: from floppy.pyrenet.fr (news.pyrenet.fr [194.116.145.2])
|
|
by postgresql.org (Postfix) with ESMTP id 7C5729DC81D
|
|
for <pgsql-bugs@postgresql.org>; Tue, 28 Feb 2006 22:12:15 -0400 (AST)
|
|
Received: by floppy.pyrenet.fr (Postfix, from userid 106)
|
|
id 6A8CA30BA5; Wed, 1 Mar 2006 03:12:19 +0100 (MET)
|
|
From: "Qingqing Zhou" <zhouqq@cs.toronto.edu>
|
|
X-Newsgroups: pgsql.bugs
|
|
Subject: Re: [BUGS] FATAL: semctl(1672698088, 12, SETVAL, 0) failed
|
|
Date: Wed, 1 Mar 2006 10:08:58 +0800
|
|
Organization: Hub.Org Networking Services
|
|
Lines: 68
|
|
Message-ID: <du2vtq$eu3$1@news.hub.org>
|
|
References: <dtglar$15tv$1@news.hub.org> <200602281905.k1SJ52b19021@candle.pha.pa.us>
|
|
X-Complaints-To: usenet@news.hub.org
|
|
X-Priority: 3
|
|
X-MSMail-Priority: Normal
|
|
X-Newsreader: Microsoft Outlook Express 6.00.2800.1506
|
|
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1506
|
|
To: pgsql-bugs@postgresql.org
|
|
X-Virus-Scanned: by amavisd-new at hub.org
|
|
X-Spam-Status: No, score=0.169 required=5 tests=[AWL=0.169]
|
|
X-Spam-Score: 0.169
|
|
X-Mailing-List: pgsql-bugs
|
|
List-Archive: <http://archives.postgresql.org/pgsql-bugs>
|
|
List-Help: <mailto:majordomo@postgresql.org?body=help>
|
|
List-Id: <pgsql-bugs.postgresql.org>
|
|
List-Owner: <mailto:pgsql-bugs-owner@postgresql.org>
|
|
List-Post: <mailto:pgsql-bugs@postgresql.org>
|
|
List-Subscribe: <mailto:majordomo@postgresql.org?body=sub%20pgsql-bugs>
|
|
List-Unsubscribe: <mailto:majordomo@postgresql.org?body=unsub%20pgsql-bugs>
|
|
Precedence: bulk
|
|
Sender: pgsql-bugs-owner@postgresql.org
|
|
Status: ROr
|
|
|
|
|
|
"Bruce Momjian" <pgman@candle.pha.pa.us> wrote
|
|
> > In port/win32.h, we have
|
|
> >
|
|
> > #undef EAGAIN
|
|
> > #undef EINTR
|
|
> > #define EINTR WSAEINTR
|
|
> > #define EAGAIN WSAEWOULDBLOCK
|
|
> >
|
|
> > What's the rationale of doing so?
|
|
>
|
|
> We did this so that our code could refer to EINTR/EAGAIN without
|
|
> port-specific tests.
|
|
>
|
|
|
|
AFAICS, by doing so, the EINTR/EAGAIN will be translated into
|
|
WSAINTR/WSAEWOULDBLOCK through *all* the backend code. That's seems not
|
|
appropriate for the code not involving any socket stuff ... I think we need
|
|
a fix here.
|
|
|
|
> > (2) What's happened here?
|
|
> > It may come from PGSemaphoreReset(), and win32 semop() looks like this:
|
|
> >
|
|
> > ret = WaitForMultipleObjectsEx(2, wh, FALSE, (sops[0].sem_flg &
|
|
> > IPC_NOWAIT) ? 0 : INFINITE, TRUE);
|
|
> > ...
|
|
> > else if (ret == WAIT_OBJECT_0 + 1 || ret == WAIT_IO_COMPLETION)
|
|
> > {
|
|
> > pgwin32_dispatch_queued_signals();
|
|
> > errno = EINTR;
|
|
> > }
|
|
> > else if (ret == WAIT_TIMEOUT)
|
|
> > errno = EAGAIN;
|
|
> >
|
|
> > So it seems the EINTR is caused by an incoming signal, the EAGAIN is
|
|
caused
|
|
> > by a TIMEOUT ... any ideas?
|
|
>
|
|
> I looked at the documentation for the function:
|
|
>
|
|
>
|
|
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dllproc/base/waitformultipleobjectsex.asp
|
|
>
|
|
> and it isn't clear what return failure values it has. We certainly
|
|
> could loop on WSAEINTR. Can you test it?
|
|
>
|
|
|
|
Yeah, looking at other code of using semop(), we could plug in a loop in the
|
|
win32 semctl():
|
|
|
|
/* Quickly lock/unlock the semaphore (if we can) */
|
|
+ do
|
|
+ {
|
|
+ errStatus = semop(semId, &sops, 1);
|
|
+ } while (errStatus < 0 && errno == EINTR);
|
|
|
|
if (semop(semId, &sops, 1) < 0)
|
|
return -1;
|
|
|
|
But:
|
|
(1) The EINTR problem happens rather rare, so testing it is difficult;
|
|
(2) I would rather not doing the above changes before we understand what's
|
|
happened here, especially when we have seen a EAGAIN reported here.
|
|
|
|
Regards,
|
|
Qingqing
|
|
|
|
|
|
|
|
---------------------------(end of broadcast)---------------------------
|
|
TIP 1: if posting/reading through Usenet, please send an appropriate
|
|
subscribe-nomail command to majordomo@postgresql.org so that your
|
|
message can get through to the mailing list cleanly
|
|
|
|
From pgsql-bugs-owner+M14485@postgresql.org Tue Feb 28 22:08:57 2006
|
|
Return-path: <pgsql-bugs-owner+M14485@postgresql.org>
|
|
Received: from ams.hub.org (ams.hub.org [200.46.204.13])
|
|
by candle.pha.pa.us (8.11.6/8.11.6) with ESMTP id k2138uk09057
|
|
for <pgman@candle.pha.pa.us>; Tue, 28 Feb 2006 22:08:56 -0500 (EST)
|
|
Received: from postgresql.org (postgresql.org [200.46.204.71])
|
|
by ams.hub.org (Postfix) with ESMTP id B4EFF67B7CA
|
|
for <pgman@candle.pha.pa.us>; Tue, 28 Feb 2006 23:08:53 -0400 (AST)
|
|
X-Original-To: pgsql-bugs-postgresql.org@localhost.postgresql.org
|
|
Received: from localhost (av.hub.org [200.46.204.144])
|
|
by postgresql.org (Postfix) with ESMTP id 4A2B39DCB5D
|
|
for <pgsql-bugs-postgresql.org@localhost.postgresql.org>; Tue, 28 Feb 2006 23:08:34 -0400 (AST)
|
|
Received: from postgresql.org ([200.46.204.71])
|
|
by localhost (av.hub.org [200.46.204.144]) (amavisd-new, port 10024)
|
|
with ESMTP id 77300-07
|
|
for <pgsql-bugs-postgresql.org@localhost.postgresql.org>;
|
|
Tue, 28 Feb 2006 23:08:38 -0400 (AST)
|
|
X-Greylist: from auto-whitelisted by SQLgrey-
|
|
Received: from candle.pha.pa.us (candle.pha.pa.us [70.90.9.53])
|
|
by postgresql.org (Postfix) with ESMTP id E8B109DCB0D
|
|
for <pgsql-bugs@postgresql.org>; Tue, 28 Feb 2006 23:08:31 -0400 (AST)
|
|
Received: (from pgman@localhost)
|
|
by candle.pha.pa.us (8.11.6/8.11.6) id k2138bO09022;
|
|
Tue, 28 Feb 2006 22:08:37 -0500 (EST)
|
|
From: Bruce Momjian <pgman@candle.pha.pa.us>
|
|
Message-ID: <200603010308.k2138bO09022@candle.pha.pa.us>
|
|
Subject: Re: [BUGS] FATAL: semctl(1672698088, 12, SETVAL, 0) failed
|
|
In-Reply-To: <du2vtq$eu3$1@news.hub.org>
|
|
To: Qingqing Zhou <zhouqq@cs.toronto.edu>
|
|
Date: Tue, 28 Feb 2006 22:08:37 -0500 (EST)
|
|
cc: pgsql-bugs@postgresql.org
|
|
X-Mailer: ELM [version 2.4ME+ PL121 (25)]
|
|
MIME-Version: 1.0
|
|
Content-Transfer-Encoding: 7bit
|
|
Content-Type: text/plain; charset=US-ASCII
|
|
X-Virus-Scanned: by amavisd-new at hub.org
|
|
X-Spam-Status: No, score=0.404 required=5 tests=[AWL=-0.096, RAZOR2_CHECK=0.5]
|
|
X-Spam-Score: 0.404
|
|
X-Mailing-List: pgsql-bugs
|
|
List-Archive: <http://archives.postgresql.org/pgsql-bugs>
|
|
List-Help: <mailto:majordomo@postgresql.org?body=help>
|
|
List-Id: <pgsql-bugs.postgresql.org>
|
|
List-Owner: <mailto:pgsql-bugs-owner@postgresql.org>
|
|
List-Post: <mailto:pgsql-bugs@postgresql.org>
|
|
List-Subscribe: <mailto:majordomo@postgresql.org?body=sub%20pgsql-bugs>
|
|
List-Unsubscribe: <mailto:majordomo@postgresql.org?body=unsub%20pgsql-bugs>
|
|
Precedence: bulk
|
|
Sender: pgsql-bugs-owner@postgresql.org
|
|
Status: RO
|
|
|
|
Qingqing Zhou wrote:
|
|
>
|
|
> "Bruce Momjian" <pgman@candle.pha.pa.us> wrote
|
|
> > > In port/win32.h, we have
|
|
> > >
|
|
> > > #undef EAGAIN
|
|
> > > #undef EINTR
|
|
> > > #define EINTR WSAEINTR
|
|
> > > #define EAGAIN WSAEWOULDBLOCK
|
|
> > >
|
|
> > > What's the rationale of doing so?
|
|
> >
|
|
> > We did this so that our code could refer to EINTR/EAGAIN without
|
|
> > port-specific tests.
|
|
> >
|
|
>
|
|
> AFAICS, by doing so, the EINTR/EAGAIN will be translated into
|
|
> WSAINTR/WSAEWOULDBLOCK through *all* the backend code. That's seems not
|
|
> appropriate for the code not involving any socket stuff ... I think we need
|
|
> a fix here.
|
|
|
|
Uh, how do we handle it now? I thought we did just that.
|
|
|
|
> http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dllproc/base/waitformultipleobjectsex.asp
|
|
> >
|
|
> > and it isn't clear what return failure values it has. We certainly
|
|
> > could loop on WSAEINTR. Can you test it?
|
|
> >
|
|
>
|
|
> Yeah, looking at other code of using semop(), we could plug in a loop in the
|
|
> win32 semctl():
|
|
>
|
|
> /* Quickly lock/unlock the semaphore (if we can) */
|
|
> + do
|
|
> + {
|
|
> + errStatus = semop(semId, &sops, 1);
|
|
> + } while (errStatus < 0 && errno == EINTR);
|
|
>
|
|
> if (semop(semId, &sops, 1) < 0)
|
|
> return -1;
|
|
>
|
|
> But:
|
|
> (1) The EINTR problem happens rather rare, so testing it is difficult;
|
|
> (2) I would rather not doing the above changes before we understand what's
|
|
> happened here, especially when we have seen a EAGAIN reported here.
|
|
|
|
OK, so how do we find the answer?
|
|
|
|
--
|
|
Bruce Momjian http://candle.pha.pa.us
|
|
SRA OSS, Inc. http://www.sraoss.com
|
|
|
|
+ If your life is a hard drive, Christ can be your backup. +
|
|
|
|
---------------------------(end of broadcast)---------------------------
|
|
TIP 2: Don't 'kill -9' the postmaster
|
|
|