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From: Andrew Morton <akpm@linux-foundation.org>
To: Jan Kara <jack@suse.cz>
Cc: <linux-mm@kvack.org>, Mel Gorman <mgorman@suse.de>,
	"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
	<linux-fsdevel@vger.kernel.org>
Subject: Re: [PATCH 7/7] mm: Batch radix tree operations when truncating pages
Date: Tue, 17 Oct 2017 16:05:21 -0700	[thread overview]
Message-ID: <20171017160521.33ca85c45431c355833daa63@linux-foundation.org> (raw)
In-Reply-To: <20171010151937.26984-8-jack@suse.cz>

On Tue, 10 Oct 2017 17:19:37 +0200 Jan Kara <jack@suse.cz> wrote:

> --- a/mm/truncate.c
> +++ b/mm/truncate.c
> @@ -294,6 +294,14 @@ void truncate_inode_pages_range(struct address_space *mapping,
>  	while (index < end && pagevec_lookup_entries(&pvec, mapping, index,
>  			min(end - index, (pgoff_t)PAGEVEC_SIZE),
>  			indices)) {
> +		/*
> +		 * Pagevec array has exceptional entries and we may also fail
> +		 * to lock some pages. So we store pages that can be deleted
> +		 * in an extra array.
> +		 */
> +		struct page *pages[PAGEVEC_SIZE];
> +		int batch_count = 0;

OK, but we could still use a new pagevec here.  Then
delete_from_page_cache_batch() and page_cache_tree_delete_batch() would
take one less argument.

--
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WARNING: multiple messages have this Message-ID
From: Andrew Morton <akpm@linux-foundation.org>
To: Jan Kara <jack@suse.cz>
Cc: linux-mm@kvack.org, Mel Gorman <mgorman@suse.de>,
	"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
	linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH 7/7] mm: Batch radix tree operations when truncating pages
Date: Tue, 17 Oct 2017 16:05:21 -0700	[thread overview]
Message-ID: <20171017160521.33ca85c45431c355833daa63@linux-foundation.org> (raw)
In-Reply-To: <20171010151937.26984-8-jack@suse.cz>

On Tue, 10 Oct 2017 17:19:37 +0200 Jan Kara <jack@suse.cz> wrote:

> --- a/mm/truncate.c
> +++ b/mm/truncate.c
> @@ -294,6 +294,14 @@ void truncate_inode_pages_range(struct address_space *mapping,
>  	while (index < end && pagevec_lookup_entries(&pvec, mapping, index,
>  			min(end - index, (pgoff_t)PAGEVEC_SIZE),
>  			indices)) {
> +		/*
> +		 * Pagevec array has exceptional entries and we may also fail
> +		 * to lock some pages. So we store pages that can be deleted
> +		 * in an extra array.
> +		 */
> +		struct page *pages[PAGEVEC_SIZE];
> +		int batch_count = 0;

OK, but we could still use a new pagevec here.  Then
delete_from_page_cache_batch() and page_cache_tree_delete_batch() would
take one less argument.

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>

  parent reply	other threads:[~2017-10-17 23:05 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-10-10 15:19 [PATCH 0/7 v1] Speed up page cache truncation Jan Kara
2017-10-10 15:19 ` Jan Kara
2017-10-10 15:19 ` [PATCH 1/7] mm: Speedup cancel_dirty_page() for clean pages Jan Kara
2017-10-10 15:19   ` Jan Kara
2017-10-10 15:19 ` [PATCH 2/7] mm: Refactor truncate_complete_page() Jan Kara
2017-10-10 15:19   ` Jan Kara
2017-10-10 15:19 ` [PATCH 3/7] mm: Factor out page cache page freeing into a separate function Jan Kara
2017-10-10 15:19   ` Jan Kara
2017-10-10 15:19 ` [PATCH 4/7] mm: Move accounting updates before page_cache_tree_delete() Jan Kara
2017-10-10 15:19   ` Jan Kara
2017-10-10 15:19 ` [PATCH 5/7] mm: Move clearing of page->mapping to page_cache_tree_delete() Jan Kara
2017-10-10 15:19   ` Jan Kara
2017-10-10 15:19 ` [PATCH 6/7] mm: Factor out checks and accounting from __delete_from_page_cache() Jan Kara
2017-10-10 15:19   ` Jan Kara
2017-10-10 15:19 ` [PATCH 7/7] mm: Batch radix tree operations when truncating pages Jan Kara
2017-10-10 15:19   ` Jan Kara
2017-10-11  7:39   ` Mel Gorman
2017-10-17 23:05   ` Andrew Morton [this message]
2017-10-17 23:05     ` Andrew Morton
2017-10-18 10:44     ` Jan Kara
2017-10-10 17:25 ` [PATCH 0/7 v1] Speed up page cache truncation Andi Kleen
2017-10-10 17:25   ` Andi Kleen
2017-10-11  8:06   ` Jan Kara
2017-10-11 16:51     ` Andi Kleen
2017-10-11 17:34     ` Dave Hansen
2017-10-11 17:59       ` Mel Gorman
2017-10-11 18:37         ` Andi Kleen
2017-10-11 21:06       ` Jan Kara
2017-10-11 21:24         ` Dave Chinner
2017-10-12  9:09           ` Mel Gorman
2017-10-12 14:07           ` Jan Kara
2017-10-17 16:21 [PATCH 0/7 v2] " Jan Kara
2017-10-17 16:21 ` [PATCH 7/7] mm: Batch radix tree operations when truncating pages Jan Kara
2017-10-17 16:21   ` Jan Kara

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