Re: [PATCH v13 03/12] splice: Do splice read from a buffered file without using ITER_PIPE

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To: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Subject: Re: [PATCH v13 03/12] splice: Do splice read from a buffered file without using ITER_PIPE
From: David Howells <dhowells@xxxxxxxxxx>
Date: Mon, 13 Feb 2023 11:15:37 +0000
Cc: dhowells@xxxxxxxxxx, Jens Axboe <axboe@xxxxxxxxx>, Al Viro <viro@xxxxxxxxxxxxxxxxxx>, Matthew Wilcox <willy@xxxxxxxxxxxxx>, Jan Kara <jack@xxxxxxx>, Jeff Layton <jlayton@xxxxxxxxxx>, David Hildenbrand <david@xxxxxxxxxx>, Jason Gunthorpe <jgg@xxxxxxxxxx>, Logan Gunthorpe <logang@xxxxxxxxxxxx>, Hillf Danton <hdanton@xxxxxxxx>, linux-fsdevel@xxxxxxxxxxxxxxx, linux-block@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, Christoph Hellwig <hch@xxxxxx>, John Hubbard <jhubbard@xxxxxxxxxx>
In-reply-to: <Y+oOa3bbJZallKtl@infradead.org>
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References: <Y+oOa3bbJZallKtl@infradead.org> <Y+n0n2UE8BQa/OwW@infradead.org> <20230209102954.528942-1-dhowells@redhat.com> <20230209102954.528942-4-dhowells@redhat.com> <1753989.1676283061@warthog.procyon.org.uk>

Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote:

> > > Also why doesn't this use init_sync_kiocb?
> > 
> > I'm not sure I want ki_flags.
> 
> Why?

I'm not sure I want ki_flags setting from f_iocb_flags I should've said.  I'm
not sure how the IOCB_* flags that I import from there will affect the
operation of the synchronous read splice.  IOCB_NOWAIT, for example, or, for
that matter, IOCB_APPEND.

David

Follow-Ups:
- Re: [PATCH v13 03/12] splice: Do splice read from a buffered file without using ITER_PIPE
  - From: Christoph Hellwig

References:
- Re: [PATCH v13 03/12] splice: Do splice read from a buffered file without using ITER_PIPE
  - From: Christoph Hellwig
- Re: [PATCH v13 03/12] splice: Do splice read from a buffered file without using ITER_PIPE
  - From: Christoph Hellwig
- [PATCH v13 00/12] iov_iter: Improve page extraction (pin or just list)
  - From: David Howells
- [PATCH v13 03/12] splice: Do splice read from a buffered file without using ITER_PIPE
  - From: David Howells
- Re: [PATCH v13 03/12] splice: Do splice read from a buffered file without using ITER_PIPE
  - From: David Howells

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