From mboxrd@z Thu Jan 1 00:00:00 1970 From: Zan Lynx Subject: Question about memory pressure freezes Date: Thu, 26 Jul 2007 16:25:57 -0600 Message-ID: <1185488757.33588.6.camel@localhost> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-gWQngKWDIAwniOoDG8Qk" Return-path: Sender: reiserfs-devel-owner@vger.kernel.org List-Id: To: ReiserFS Mailing List --=-gWQngKWDIAwniOoDG8Qk Content-Type: text/plain Content-Transfer-Encoding: quoted-printable I have often experienced nearly full system freezes for up to five seconds at a time while memory is being flushed to disk. I'm not sure if this is a general Linux problem or a Reiser4 problem, so I thought I'd ask. A sysrq-T during the freeze shows many processes trying to acquire a memory page, and Reiser4 flushing atoms and doing sync things. My working theory right now is that Reiser4 spends time flushing a lot of data at once before returning. If I am right about that, would it not make more sense to flush a few pages, return to the kernel, flush a few more pages, return to the kernel, etc, etc? That way programs could get a bit of RAM and make some progress. Of course I could be completely off about what's going on. --=20 Zan Lynx --=-gWQngKWDIAwniOoDG8Qk Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.5 (GNU/Linux) iD8DBQBGqR91G8fHaOLTWwgRAoQhAJ4yHfeMog/dSZhMR2PladZQ7l94zACfQIf2 30fiDTmlN3U1AJ32GOb0NZg= =WH8f -----END PGP SIGNATURE----- --=-gWQngKWDIAwniOoDG8Qk--