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From: Nick Piggin <npiggin@suse.de>
To: Andrew Morton <akpm@osdl.org>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>,
	Linux Filesystems <linux-fsdevel@vger.kernel.org>,
	Linux Memory Management <linux-mm@kvack.org>
Subject: Re: [patch 9/9] mm: fix pagecache write deadlocks
Date: Mon, 29 Jan 2007 12:11:15 +0100	[thread overview]
Message-ID: <20070129111115.GA14504@wotan.suse.de> (raw)
In-Reply-To: <20070129082030.23584.72376.sendpatchset@linux.site>

On Mon, Jan 29, 2007 at 11:33:03AM +0100, Nick Piggin wrote:
> +		} else {
> +			char *src, *dst;
> +			src = kmap(src_page);
> +			dst = kmap(page);
> +			memcpy(dst + offset,
> +				src + ((unsigned long)buf & ~PAGE_CACHE_MASK),
> +				bytes);
> +			kunmap(page);
> +			kunmap(src_page);
> +			copied = bytes;
> +		}
>  		flush_dcache_page(page);

Hmm, I guess these should use kmap_atomic with KM_USER[01]?

The kmap is from an earlier iteration that wanted to sleep
with the page mapped into kernel.

  reply	other threads:[~2007-01-29 11:11 UTC|newest]

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-01-29 10:31 [patch 0/9] buffered write deadlock fix Nick Piggin
2007-01-29 10:31 ` [patch 1/9] fs: libfs buffered write leak fix Nick Piggin
2007-02-02 23:52   ` Andrew Morton
2007-02-03  1:33     ` Nick Piggin
2007-02-03  1:58       ` Andrew Morton
2007-02-03  2:09         ` Nick Piggin
2007-02-03  2:19           ` Andrew Morton
2007-02-03  2:28             ` Nick Piggin
2007-02-03 17:49       ` Jörn Engel
2007-02-04  3:55         ` Nick Piggin
2007-01-29 10:31 ` [patch 2/9] mm: revert "generic_file_buffered_write(): handle zero length iovec segments" Nick Piggin
2007-01-29 10:32 ` [patch 3/9] mm: revert "generic_file_buffered_write(): deadlock on vectored write" Nick Piggin
2007-01-29 10:32 ` [patch 4/9] mm: generic_file_buffered_write cleanup Nick Piggin
2007-01-29 10:32 ` [patch 5/9] mm: debug write deadlocks Nick Piggin
2007-01-29 10:32 ` [patch 6/9] mm: be sure to trim blocks Nick Piggin
2007-01-29 10:32 ` [patch 7/9] mm: cleanup pagecache insertion operations Nick Piggin
2007-01-29 10:32 ` [patch 8/9] mm: generic_file_buffered_write iovec cleanup Nick Piggin
2007-01-29 10:33 ` [patch 9/9] mm: fix pagecache write deadlocks Nick Piggin
2007-01-29 11:11   ` Nick Piggin [this message]
2007-02-02 23:53   ` Andrew Morton
2007-02-03  1:38     ` Nick Piggin
2007-01-30 20:55 ` [patch 0/9] buffered write deadlock fix Andrew Morton
2007-01-30 23:21   ` Andrew Morton
2007-01-31  1:31     ` Nick Piggin
2007-01-31  0:32   ` Nick Piggin
2007-02-02 23:52 ` Andrew Morton
2007-02-03  1:22   ` Nick Piggin
2007-02-03  6:43   ` Suparna Bhattacharya
     [not found]   ` <370516630.03363@ustc.edu.cn>
2007-02-03 15:31     ` Fengguang Wu
2007-02-04  8:49 Nick Piggin
2007-02-04  8:51 ` [patch 9/9] mm: fix pagecache write deadlocks Nick Piggin
2007-02-04  9:44   ` Andrew Morton
2007-02-04 10:15     ` Nick Piggin
2007-02-04 10:26       ` Christoph Hellwig
2007-02-04 10:30       ` Andrew Morton
2007-02-04 10:46         ` Nick Piggin
2007-02-04 10:50           ` Nick Piggin
2007-02-04 10:56           ` Andrew Morton
2007-02-04 11:03             ` Nick Piggin
2007-02-04 11:15               ` Andrew Morton
2007-02-04 15:10                 ` Nick Piggin
2007-02-04 18:36                   ` Andrew Morton
2007-02-06  2:25                     ` Nick Piggin
2007-02-06  4:41                       ` Nick Piggin
2007-02-06  5:30                         ` Andrew Morton
2007-02-06  5:49                           ` Nick Piggin
2007-02-06  5:53                             ` Nick Piggin
2007-02-04 10:59     ` Anton Altaparmakov
2007-02-04 11:10       ` Andrew Morton
2007-02-04 11:22         ` Nick Piggin
2007-02-04 17:40         ` Anton Altaparmakov
2007-02-06  2:09           ` Nick Piggin
2007-02-06 13:13             ` Anton Altaparmakov

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