Date: Sun, 15 Jun 2008 14:12:52 +0300 From: Kostik Belousov <kostikbel@gmail.com> To: Dmitry Morozovsky <marck@rinet.ru> Cc: delphij@freebsd.org, current@freebsd.org Subject: Re: tmpfs panic Message-ID: <20080615111252.GC94309@deviant.kiev.zoral.com.ua> In-Reply-To: <20080615145943.X43777@woozle.rinet.ru> References: <20080615130037.J43777@woozle.rinet.ru> <20080615101918.GA94309@deviant.kiev.zoral.com.ua> <20080615145943.X43777@woozle.rinet.ru>
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--JeObzbN4jAL/QUby Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sun, Jun 15, 2008 at 03:05:45PM +0400, Dmitry Morozovsky wrote: > On Sun, 15 Jun 2008, Kostik Belousov wrote: >=20 > KB> On Sun, Jun 15, 2008 at 01:06:24PM +0400, Dmitry Morozovsky wrote: > KB> > Hi there, > KB> >=20 > KB> > at contemporary RELENG_7/amd64 >=20 > [snip] >=20 >=20 > KB> I suspect this may be my mistake. > KB> IN case you can reproduce it, please, try the patch below. >=20 > Will try, thank you.=20 >=20 > KB> > Also, active tmpfs usage easy leads to "swap zone exhausted, increa= se > KB> > kern.maxswzone", even with 2G RAM + 4G swap and approx 2-3G of tmpfs > KB> > in use -- any hints? > KB>=20 > KB> I think the message is pretty much self-explanatory. Kernel tried to > KB> allocate the meatadata to track the swap metadata, and zone appears > KB> exhausted. It is not the swap space shortage. Instead, this is kernel > KB> zone used to track swap allocation shortage. > KB>=20 > KB> It is quite non-obvious how to automatically tune this limit, since z= one > KB> is allocated before swap is configured. >=20 > Well, but loader(8) man page said: > The default of 32MB allows the kernel to support a maximum of ~7GB of s= wap.=20 >=20 > and I have only 4G, and system freezes with maxswzone exaustion well befo= re=20 > that... I suspect that the estimation both outdated and arch-specific (i.e. at least divide it by two for amd64). --JeObzbN4jAL/QUby Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (FreeBSD) iEYEARECAAYFAkhU+TMACgkQC3+MBN1Mb4jDfwCfWz7wlbfPVmNyO0dC1NIDMfGt OLMAoJhreFqt4MBNd/45z9AXevXBzdL2 =NX87 -----END PGP SIGNATURE----- --JeObzbN4jAL/QUby--
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