Date: Thu, 02 Dec 1999 11:49:19 -0600 From: Jim King <king@sstar.com> To: freebsd-stable@freebsd.org Subject: Re: swap_pager: indefinite wait buffer? Message-ID: <4.2.0.58.19991202114512.00a47948@mail.sstar.com> In-Reply-To: <4.2.0.58.19991202095115.00aa9648@mail.sstar.com>
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At 09:53 AM 12/2/1999 -0600, Jim King wrote: >Sorry if this doesn't belong on -stable, but I didn't get a response on >-questions. > >I got this in my messages file: > >Dec 1 09:10:20 cgi /kernel: swap_pager: indefinite wait buffer: device: >0x20401, blkno: 776, size: 4096 >Dec 1 09:11:31 cgi /kernel: swap_pager: indefinite wait buffer: device: >0x20401, blkno: 776, size: 4096 >Dec 1 09:11:32 cgi last message repeated 2 times > >What exactly does this mean? I'm afraid that it means some disk hardware >is flaking out. If that's the case how do I know which disk had the >problem? (I have swap space on two drives.) OK, call me a doofus for not searching the mailing list archives. To answer my own question, this means that a pageout took longer than 20 seconds on device major 4, minor 0x20001, which happens to be /dev/da0s1b on my system (swap space on the first drive). The usual advice is that this is harmless. It does NOT indicate failing hardware. However, it does indicate a busy disk, and if it happens a lot you should probably add swap space on another drive (already done, unfortunately) and/or more memory. I saw this question a lot in the archives. Would this be a good one for the FAQ? Jim To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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