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 12:45:51 -0700 (PDT) [thread overview]
Message-ID: <alpine.LFD.1.10.0806241243570.2926@woody.linux-foundation.org> (raw)
In-Reply-To: <E1KBE7p-0002eT-CJ@pomaz-ex.szeredi.hu>
On Tue, 24 Jun 2008, Miklos Szeredi wrote:
>
> Right. But what if it's invalidated *before* becoming uptodate (if
> you'd read my mail further, I discussed this).
>
> Why does invalidate_complete_page2() do ClearPageUptodate()? Dunno,
> maybe it shoulnd't. But that would need a rather thorough audit of
> all code checking PageUptodate()...
Quite frankly, that shouldn't happen in the first place. Nothing should
clear up-to-date on a page that is locked. Doesn't
invalidate_complete_page() wait for the page to be unlocked already?
That said, the VM people already discussed (I think for other reasons),
removing the ClearPageUptodate(), because it has problems. There's talk
about just unhashing the page or moving it to another radix tree or
something.
Linus
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next prev parent reply other threads:[~2008-06-24 19:45 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
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 [this message]
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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