Date: Thu, 1 Nov 2001 09:52:45 +0800 From: "David Xu" <davidx@viasoft.com.cn> To: "Peter Wemm" <peter@wemm.org> Cc: <freebsd-hackers@FreeBSD.ORG> Subject: Re: pmap_collect() and PG_UNMANAGED Message-ID: <002f01c16277$e8ac22b0$ef01a8c0@davidwnt> References: <20011101014322.1954A3808@overcee.netplex.com.au>
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----- Original Message -----=20 From: "Peter Wemm" <peter@wemm.org> To: "David Xu" <davidx@viasoft.com.cn> Cc: <freebsd-hackers@FreeBSD.ORG> Sent: Thursday, November 01, 2001 9:43 AM Subject: Re: pmap_collect() and PG_UNMANAGED=20 > "David Xu" wrote: > > This is a multi-part message in MIME format. > >=20 > > ------=3D_NextPart_000_000C_01C162B1.0ECE7770 > > Content-Type: text/plain; > > charset=3D"gb2312" > > Content-Transfer-Encoding: quoted-printable > >=20 > > Hi, > >=20 > > is there any reason why pmap_collect() in /sys/i386/i386/pmap.c = does =3D > > not > > check PG_UNMANAGED flag? unmanaged page does not have pv_entry =3D > > associated, > > so call pmap_remove_all() has side effect, PG_MAPPED and = PG_WRITEABLE =3D > > are=3D20 > > roughly cleared. > >=20 > > -- > > David Xu >=20 > Did you have something like this in mind? >=20 > @@ -1729,7 +1729,7 @@ > for(i =3D 0; i < vm_page_array_size; i++) { > m =3D &vm_page_array[i]; > if (m->wire_count || m->hold_count || m->busy || > - (m->flags & PG_BUSY)) > + (m->flags & (PG_BUSY | PG_UNMANAGED))) > continue; > pmap_remove_all(m); > } >=20 Yes, I have changed and tested it yesterday, I have pushed a memory hog = program into=20 system, run it about half an hour, almost every program was swapped out, = still without cause any problem, it seems it is safe to add this flag. > BTW; please stop posting MIME/HTML onto mailing lists. >=20 Sorry, my MS Outlook express sucks, I will replace it with better one! > Cheers, > -Peter > -- > Peter Wemm - peter@FreeBSD.org; peter@yahoo-inc.com; = peter@netplex.com.au > "All of this is for nothing if we don't go to the stars" - JMS/B5 -- David Xu To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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