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Howlett [230414 13:26]: > * Edgecombe, Rick P [230414 12:27]: > > On Fri, 2023-04-14 at 10:57 -0400, Liam R. Howlett wrote:
> > > +=A0=A0=A0=A0=A0=A0=A0tmp =3D mas_next(&mas, ULONG_MAX); > > > +=A0=A0=A0=A0=A0=A0=A0if (tmp && (tmp->vm_flags & VM_GROWSDOWN)) { > >=20 > > Why also check VM_GROWSDOWN here (and VM_GROWSUP below)? > > vm_start/end_gap() already have checks inside. >=20 > An artifact of a plan that was later abandoned. >=20 > >=20 > > > +=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0if (vm_start_gap(tmp) <= gap + length - 1) { > > > +=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0low_limit =3D tmp->vm_end; > > > +=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0mas_reset(&mas); > > > +=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0goto retry; > > > +=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0} > > > +=A0=A0=A0=A0=A0=A0=A0} else { > > > +=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0tmp =3D mas_prev(&mas, = 0); > > > +=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0if (tmp && (tmp->vm_fla= gs & VM_GROWSUP) && > > > +=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 vm_end_gap(tm= p) > gap) { > > > +=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0low_limit =3D vm_end_gap(tmp);=20 > > > +=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0mas_reset(&mas); > > > +=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0goto retry;=20 > > > +=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0} > > > +=A0=A0=A0=A0=A0=A0=A0}=20 > > > + > >=20 > > Could it be like this? >=20 > Yes, I'll make this change. Thanks for the suggestion. Wait, I like how it is. In my version, if there is a stack that is VM_GROWSDOWN there, but does not intercept the gap, then I won't check the prev.. in yours, we will never avoid checking prev. >=20 > >=20 > > tmp =3D mas_next(&mas, ULONG_MAX); > > if (tmp && vm_start_gap(tmp) < gap + length - 1) { > > low_limit =3D tmp->vm_end; > > mas_reset(&mas); > > goto retry; > > } > > } else { > > tmp =3D mas_prev(&mas, 0); > > if (tmp && vm_end_gap(tmp) > gap) { > > low_limit =3D vm_end_gap(tmp); > > mas_reset(&mas); > > goto retry; > > } > > } > >=20