From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: To: 9fans@cse.psu.edu Subject: Re: [9fans] plan 9 overcommits memory? From: erik quanstrom Date: Mon, 3 Sep 2007 16:16:31 -0400 In-Reply-To: <14907977b9922655ca04fb969bab2297@terzarima.net> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Topicbox-Message-UUID: b66dee30-ead2-11e9-9d60-3106f5b1d025 >> The current swap just frustrates people who expect it to work, and >> then have their systems freeze randomly. Maybe by disabling/remove >> swap support, then if someone really needs swap he will fix it first >> and then we can add it back. > > i'm not sure all the random freezes are caused by swap. > in a way, it would be nice if they were, but i wonder... probablly not. i am currently tracking down a problem on my amd system at home. the fault seems paging related, but i don't have any configured "swap" partition. this fault is during demand loading. - erik cpu0: registers for smtpd 36123 FLAGS=10206 TRAP=E ECODE=0 PC=F018BF4C SS=5C88 USP=F025194C AX F0059E1C BX F0059018 CX 00827424 DX 0000F000 SI 0000F000 DI 00010000 BP 00000000 CS 0010 DS 0008 ES 0008 FS 001B GS 001B CR0 80010039 CR2 00827458 CR3 08e5c000 CR4 000000d0 MCA 177e882776 MCT 00000000 ur f367e4c0 up f02d1ab8 panic: fault: 0x827458 ktrace -> src(0xf0108b6e); // dumpstack+0x10 src(0xf014ddb6); // panic+0xfe src(0xf0108d8c); // fault386+0x17d src(0xf010832f); // trap+0x15d src(0xf010062a); // forkret //passing interrupt frame; last pc found at sp=0xf367e4b8 src(0xf018bf4c); // lookpage+0x2f src(0xf018ab7e); // pio+0x34 src(0xf018aaaf); // fixfault+0x337 src(0xf018a663); // fault+0xc8 src(0xf0108d52); // fault386+0x143 src(0xf010832f); // trap+0x15d src(0xf010062a); // forkret acid: src(0xf018bf4c); // lookpage+0x2f /sys/src/9/port/page.c:441 4 439 lock(&palloc.hashlock); 440 for(f = pghash(daddr); f; f = f->hash) { >441 if(f->image == i && f->daddr == daddr) { /sys/src/9/port/fault.c:198 196 if(loadrec == 0) { /* from a text/data image */ 197 daddr = s->fstart+soff; >198 new = lookpage(s->image, daddr); 199 if(new != nil) { /sys/src/9/port/fault.c:90 88 case SG_TEXT: /* Demand load */ 89 if(pagedout(*pg)) >90 pio(s, addr, soff, pg);