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Subject: Re: [9front] stats(1) suicide
From: arisawa <arisawa@ar.aichi-u.ac.jp>
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Date: Sun, 10 Aug 2014 07:46:23 +0900
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thanks cinap, that works.

Kenji Arisawa

On 2014/08/10, at 0:42, cinap_lenrek@felloff.net wrote:

> many thanks kenji. i see whats wrong now. the bug is in iobufinit().
>=20
> 	xiop =3D ialloc(niob * RBUFSIZE, 0);
>=20
> niob is uint so we get 32bit result.
>=20
> iobufinit+0x114 0x000000000021ecd2	MOVL	niob(SB),BP
> iobufinit+0x11b 0x000000000021ecd9	SHLL	$0xe,BP				=
/* multiplication by shift */
> iobufinit+0x11e 0x000000000021ecdc	MOVL	BP,BP
> iobufinit+0x120 0x000000000021ecde	MOVL	$0x0,0x8(SP)
> iobufinit+0x128 0x000000000021ece6	CALL	ialloc(SB)
>=20
> you must have raised fsmempercent so that it used more than 4g
> for buffers causing the overflow.
>=20
> i pushed fix now that does 64bit multiplications on amd64 so it
> should work now after pull and recompiling cwfs and kernel.
>=20
> --
> cinap