Re: [PATCH] GOP_ALLOC and fallocate for PUFFS

To: hannken%eis.cs.tu-bs.de@localhost (J. Hannken-Illjes)
Subject: Re: [PATCH] GOP_ALLOC and fallocate for PUFFS
From: manu%netbsd.org@localhost (Emmanuel Dreyfus)
Date: Thu, 2 Oct 2014 19:09:56 +0200

J. Hannken-Illjes <hannken%eis.cs.tu-bs.de@localhost> wrote:

> Please describe "cached write operation" in terms of vnode operations.

A write on a mount that uses page cache, without direct I/O.

> Which vnode operation finally calls GOP_ALLOC()?

From genfs, only VOP_GETPAGES, but I understand we should call it on our
own. For instance, UFS calls it through ufs_balloc_range() in VOP_WRITE.

-- 
Emmanuel Dreyfus
http://hcpnet.free.fr/pubz
manu%netbsd.org@localhost

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