Date: Tue, 3 May 2016 08:27:52 -0600 From: Scott Long <scott4long@yahoo.com> To: Mark Johnston <markj@FreeBSD.org> Cc: Steve Wills <swills@FreeBSD.org>, FreeBSD PowerPC ML <freebsd-ppc@freebsd.org>, freebsd-current@freebsd.org, scottl@FreeBSD.org, Warner Losh <imp@bsdimp.com> Subject: Re: wired memory leak at r298785 Message-ID: <E7308871-DC4F-4DB2-867C-271AF01F8DD6@yahoo.com> In-Reply-To: <20160503062031.GA2209@raichu> References: <572756DF.1010809@FreeBSD.org> <5727F71E.20101@FreeBSD.org> <20160503062031.GA2209@raichu>
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> On May 3, 2016, at 12:20 AM, Mark Johnston <markj@FreeBSD.org> wrote: > > On Mon, May 02, 2016 at 08:55:58PM -0400, Steve Wills wrote: >> Hi, >> >> On 05/ 2/16 09:32 AM, Steve Wills wrote: >>> Hi, >>> >>> Just did my monthly update and r298785 seems to be leaking wired memory >>> rather rapidly. My system has 8gb of RAM and the amount of wired memory >>> just goes up and up continuously. It takes about 12 hours before it >>> exhausts all the RAM and sort of locks up (though shutdown still works). >>> >>> I also made one other change to the system at the same time as updating, >>> which was to add another disk and configure it using ZFS. Perhaps this >>> is a ZFS on PowerPC64 issue? My amd64 box running the same rev of >>> CURRENT doesn't have the issue. >>> >> >> I've rebooted the box and started repeatedly logging the output of >> vmstat -m. It seems to show CAM CCB using a lot of memory and growing >> rather rapidly. For example, here's a few lines of diff output: >> >> - CAM CCB 91418 182836K - 187149 2048 >> + CAM CCB 447070 894140K - 900292 2048 >> >> from two samples that are 60 minutes apart. >> >> The box is isn't terribly busy, it's just running the monitoring daemons >> running (snmpd, collectd), whatever web requests are hitting it (very >> few if any), this logging process, and my shell, etc. > > This was causing problems on one of my amd64 systems, so it's not > specific to powerpc64. It turns out to be due to r298004: the CCB > allocated in cam_periph_devctl_notify() never gets freed. The patch > below seems to fix it. Thanks Mark, that looks like the right fix. I’ll put it in today. Scott
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