From: Linus Torvalds <torvalds@linux-foundation.org>
To: Miklos Szeredi <miklos@szeredi.hu>
Cc: jens.axboe@oracle.com, linux-fsdevel@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [rfc patch 3/4] splice: remove confirm from pipe_buf_operations
Date: Tue, 24 Jun 2008 12:17:44 -0700 (PDT) [thread overview]
Message-ID: <alpine.LFD.1.10.0806241216350.2926@woody.linux-foundation.org> (raw)
In-Reply-To: <E1KBDpg-0002bR-3X@pomaz-ex.szeredi.hu>
On Tue, 24 Jun 2008, Miklos Szeredi wrote:
>
> Let's start with page_cache_pipe_buf_confirm(). How should we deal
> with finding an invalidated page (!PageUptodate(page) &&
> !page->mapping)?
I suspect we just have to use it. After all, it was valid when the read
was done. The fact that it got invalidated later is kind of immaterial.
splice() is an optimized read+write. The read reads it into a temporary
buffer. The fact that it's a zero-copy buffer and basically just re-uses
the source doesn't really change that.
Linus
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next prev parent reply other threads:[~2008-06-24 19:17 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-21 15:46 [rfc patch 0/4] splice: cleanups and fixes Miklos Szeredi
2008-06-21 15:46 ` [rfc patch 1/4] splice: fix comment Miklos Szeredi, Miklos Szeredi
2008-06-21 15:46 ` [rfc patch 2/4] splice: remove steal from pipe_buf_operations Miklos Szeredi, Miklos Szeredi
2008-06-24 8:01 ` Jens Axboe
2008-06-24 8:50 ` Miklos Szeredi
2008-06-24 12:21 ` Nick Piggin
2008-06-21 15:46 ` [rfc patch 3/4] splice: remove confirm " Miklos Szeredi, Miklos Szeredi
2008-06-24 8:04 ` Jens Axboe
2008-06-24 8:54 ` Miklos Szeredi
2008-06-24 11:19 ` Jens Axboe
2008-06-24 11:36 ` Miklos Szeredi
2008-06-24 11:46 ` Evgeniy Polyakov
2008-06-24 12:02 ` Miklos Szeredi
2008-06-24 12:15 ` Evgeniy Polyakov
2008-06-24 12:16 ` Nick Piggin
2008-06-24 12:22 ` Jens Axboe
2008-06-24 13:00 ` Miklos Szeredi
2008-06-24 17:30 ` Linus Torvalds
2008-06-24 18:24 ` Miklos Szeredi
2008-06-24 18:31 ` Linus Torvalds
2008-06-24 19:05 ` Miklos Szeredi
2008-06-24 19:17 ` Linus Torvalds [this message]
2008-06-24 19:24 ` Miklos Szeredi
2008-06-24 19:26 ` Miklos Szeredi
2008-06-24 19:32 ` Miklos Szeredi
2008-06-24 19:47 ` Linus Torvalds
2008-06-24 20:06 ` Miklos Szeredi
2008-06-24 19:45 ` Linus Torvalds
2008-06-21 15:46 ` [rfc patch 4/4] splice: use do_generic_file_read() Miklos Szeredi, Miklos Szeredi
2008-06-24 8:05 ` Jens Axboe
2008-06-24 11:11 ` Miklos Szeredi
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