Date: Wed, 14 May 2003 15:39:58 -0400 From: Michael Edenfield <kutulu@kutulu.org> To: peter.edwards@openet-telecom.com Cc: current@freebsd.org Subject: Re: vm_page_max_wired and gpg... Message-ID: <20030514193958.GA12881@basement.kutulu.org> In-Reply-To: <3E82B245000009F1@mail.openet-telecom.com> References: <20030513182738.GA17766@basement.kutulu.org> <3E82B245000009F1@mail.openet-telecom.com>
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--2oS5YaxWCcQjTEyO Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable * peter.edwards@openet-telecom.com <peter.edwards@openet-telecom.com> [0305= 14 15:23]: > >For some time now, gpg has been having issues on my -CURRENT system=20 > >with being unable to mlock() the ~8k buffer it uses to hold the=20 > >decrypted secret key. A ktrace shows that it's being returned an=20 > >EAGAIN from mlock(), which my peeking around has shown could be: > > > >1) I hit the RLIMIT_MLOCK limit on memory locking, or > >2) I hit the system-wide "wired pages" limit. > The kernel has a "max wired pages" limit, that's set when the swapper > starts up to be one third of physical memory. You can see this in > src/sys/vm_pageout.c, on about line 1414: >=20 > > if (vm_page_max_wired =3D=3D 0) > > vm_page_max_wired =3D cnt.v_free_count / 3; >=20 > This is pretty much a third of what you see at boot time (and in > /var/log/messages or dmesg) for "avail memory =3D " Duh, I looked right at this code and somehow it didn't hit me. It=20 makes sense, I've got roughly 22M out of 64M wired at any given time,=20 which is right at the 1/3 limit. Now it's just a matter of finding=20 out what else I'm running that's locking down pages and stop it. --Mike --2oS5YaxWCcQjTEyO Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.2 (FreeBSD) iD8DBQE+wpuNCczNhKRsh48RApcEAKCeFdb2O5hUl8R8L3Wnyh9QuhBwRgCaAlFU GWKQbENzP/NZjKElOzQxEHc= =EdNC -----END PGP SIGNATURE----- --2oS5YaxWCcQjTEyO--
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