Date: Thu, 28 Sep 2006 14:29:00 +0400 From: Ruslan Ermilov <ru@freebsd.org> To: Danny Braniss <danny@cs.huji.ac.il> Cc: Maxim Sobolev <sobomax@freebsd.org>, freebsd-stable@freebsd.org, John Baldwin <jhb@freebsd.org> Subject: Re: 6.2-PRERELEASE/amd64 boot kernel.gz failes Message-ID: <20060928102900.GC4708@rambler-co.ru> In-Reply-To: <20060927223310.GB35467@rambler-co.ru> References: <E1GSa68-000Bym-C1@cs1.cs.huji.ac.il> <20060927223310.GB35467@rambler-co.ru>
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On Thu, Sep 28, 2006 at 02:33:10AM +0400, Ruslan Ermilov wrote:
> I can confirm this: RELENG_6 doesn't pxeboot when /boot/kernel/kernel
> is gzipped. In my case, it hangs just after loading a loader.conf file.
> I've also verified that loading gzipped kernels/modules works on
> 7-CURRENT/i386. So it's either loader vs. pxeboot issue (unlikely,
> since pxeboot reuses the loader binary), or i386 vs. amd64 issue
> (unlikely as well as amd64 reuses the i386 boot code), or more likely
> because some changes were not MFCed. Perhaps this one:
>=20
> : sobomax 2005-12-19 09:00:11 UTC
> :=20
> : FreeBSD src repository
> :=20
> : Modified files:
> : sys/boot/i386/libi386 Makefile biosdisk.c biospnp.c biossmap.c=20
> : i386_copy.c=20
> : Log:
> : Long-long time ago, when the trees were large and memory expensive am=
ount of
> : memory directly available to loader(8) and friends was limited to 640=
K on i386.
> : Those times have passed long time ago and now loader(8) can directly =
access
> : up to 4GB of RAM at least theoretically. At the same time, there are =
several
> : places where it's assumed that malloc() will only allocate memory wit=
hin
> : first megabyte.
> : =20
> : Remove that assumption by allocating appropriate bounce buffers for B=
IOS
> : calls on stack where necessary.
> : =20
> : This allows using memory above first megabyte for heap if necessary.
> : =20
> : Revision Changes Path
> : 1.39 +3 -0 src/sys/boot/i386/libi386/Makefile
> : 1.46 +10 -17 src/sys/boot/i386/libi386/biosdisk.c
> : 1.10 +1 -1 src/sys/boot/i386/libi386/biospnp.c
> : 1.4 +3 -2 src/sys/boot/i386/libi386/biossmap.c
> : 1.11 +6 -22 src/sys/boot/i386/libi386/i386_copy.c
>=20
> I'll narrow this down tomorrow if noone bites me while I sleep. :-)
>=20
Yes, this and the follow-up commit plus the following diff make
pxeboot work with gzipped files.
%%%
Index: i386/loader/main.c
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
RCS file: /home/ncvs/src/sys/boot/i386/loader/main.c,v
retrieving revision 1.37
diff -u -r1.37 main.c
--- i386/loader/main.c 4 Aug 2006 07:56:32 -0000 1.37
+++ i386/loader/main.c 28 Sep 2006 09:06:02 -0000
@@ -91,7 +91,7 @@
*/
bios_getmem();
=20
-#ifdef LOADER_BZIP2_SUPPORT
+#if 1
heap_top =3D PTOV(memtop_copyin);
memtop_copyin -=3D 0x300000;
heap_bottom =3D PTOV(memtop_copyin);
%%%
Here's the loader "heap" command output on the same machine:
: 6.x /boot/loader (unpatched):
: OK heap
: Active Allocations: 803/2173
: 274432 bytes reserved 194432 bytes allocated
: 65 fragments (30016 bytes fragmented)
: heap base at 0x404c0, top at 0x834c0
:=20
: 7.x pxeboot loader (unpatched):
: OK heap
: Active Allocations: 896/2209
: 229376 bytes reserved 196728 bytes allocated
: 71 fragments (18992 bytes fragmented)
: heap base at 0x404c0, top at 0x784c0, upper limit at 0x9fc00
:=20
: 7.x pxeboot loader (patched):
: OK heap
: Active Allocations: 896/2209
: 229376 bytes reserved 196728 bytes allocated
: 71 fragments (18992 bytes fragmented)
: heap base at 0xfbce6000, top at 0xfbd1e000, upper limit at 0xfbfe6000
Cheers,
--=20
Ruslan Ermilov
ru@FreeBSD.org
FreeBSD committer
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