From: "Pankaj Raghav (Samsung)" <kernel@pankajraghav.com>
To: Matthew Wilcox <willy@infradead.org>
Cc: linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-kernel@vger.kernel.org, david@fromorbit.com,
chandan.babu@oracle.com, akpm@linux-foundation.org,
mcgrof@kernel.org, ziy@nvidia.com, hare@suse.de,
djwong@kernel.org, gost.dev@samsung.com, linux-mm@kvack.org,
Pankaj Raghav <p.raghav@samsung.com>
Subject: Re: [PATCH 05/13] readahead: set file_ra_state->ra_pages to be at least mapping_min_order
Date: Tue, 27 Feb 2024 13:42:51 +0100 [thread overview]
Message-ID: <ea3lppsqtgc6u7o4boj4j72mq5xp74o3csegvd5inkhll4nbpb@d6qcj4vem5ao> (raw)
In-Reply-To: <Zdyk4ErGQHc1q-1W@casper.infradead.org>
On Mon, Feb 26, 2024 at 02:49:04PM +0000, Matthew Wilcox wrote:
> On Mon, Feb 26, 2024 at 10:49:28AM +0100, Pankaj Raghav (Samsung) wrote:
> > From: Luis Chamberlain <mcgrof@kernel.org>
> >
> > Set the file_ra_state->ra_pages in file_ra_state_init() to be at least
> > mapping_min_order of pages if the bdi->ra_pages is less than that.
>
> Don't we rather want to round up to a multiple of mapping_min_nrpages?
Hmm. That will definitely be more explicit. We might be doing
multiple of min_nrpages now anyway, going beyond the ra_pages(if it
is not a multiple of min_nrpages).
I will do this instead:
diff --git a/mm/readahead.c b/mm/readahead.c
index 73aef3f080ba..4e3a6f763f5c 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -138,11 +138,8 @@
void
file_ra_state_init(struct file_ra_state *ra, struct address_space *mapping)
{
- unsigned int min_nrpages = mapping_min_folio_nrpages(mapping);
-
- ra->ra_pages = inode_to_bdi(mapping->host)->ra_pages;
- if (ra->ra_pages < min_nrpages)
- ra->ra_pages = min_nrpages;
+ ra->ra_pages = round_up(inode_to_bdi(mapping->host)->ra_pages,
+ mapping_min_folio_nrpages(mapping));
ra->prev_pos = -1;
}
>
> > file_ra_state_init(struct file_ra_state *ra, struct address_space *mapping)
> > {
> > + unsigned int min_nrpages = mapping_min_folio_nrpages(mapping);
> > +
> > ra->ra_pages = inode_to_bdi(mapping->host)->ra_pages;
> > + if (ra->ra_pages < min_nrpages)
> > + ra->ra_pages = min_nrpages;
> > ra->prev_pos = -1;
next prev parent reply other threads:[~2024-02-27 12:43 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-26 9:49 [PATCH 00/13] enable bs > ps in XFS Pankaj Raghav (Samsung)
2024-02-26 9:49 ` [PATCH 01/13] mm: Support order-1 folios in the page cache Pankaj Raghav (Samsung)
2024-02-26 9:49 ` [PATCH 02/13] fs: Allow fine-grained control of folio sizes Pankaj Raghav (Samsung)
2024-02-26 9:49 ` [PATCH 03/13] filemap: align the index to mapping_min_order in the page cache Pankaj Raghav (Samsung)
2024-02-26 14:40 ` Matthew Wilcox
2024-02-27 10:06 ` Pankaj Raghav (Samsung)
2024-02-27 16:22 ` Kent Overstreet
2024-02-27 16:36 ` Pankaj Raghav (Samsung)
2024-02-27 16:40 ` Kent Overstreet
2024-02-27 16:55 ` Pankaj Raghav (Samsung)
2024-02-27 17:02 ` Kent Overstreet
2024-02-27 17:09 ` Pankaj Raghav (Samsung)
2024-02-26 9:49 ` [PATCH 04/13] filemap: use mapping_min_order while allocating folios Pankaj Raghav (Samsung)
2024-02-26 14:47 ` Matthew Wilcox
2024-02-27 12:09 ` Pankaj Raghav (Samsung)
2024-02-26 9:49 ` [PATCH 05/13] readahead: set file_ra_state->ra_pages to be at least mapping_min_order Pankaj Raghav (Samsung)
2024-02-26 14:49 ` Matthew Wilcox
2024-02-27 12:42 ` Pankaj Raghav (Samsung) [this message]
2024-02-26 9:49 ` [PATCH 06/13] readahead: align index to mapping_min_order in ondemand_ra and force_ra Pankaj Raghav (Samsung)
2024-02-26 9:49 ` [PATCH 07/13] readahead: rework loop in page_cache_ra_unbounded() Pankaj Raghav (Samsung)
2024-02-26 9:49 ` [PATCH 08/13] readahead: allocate folios with mapping_min_order in ra_(unbounded|order) Pankaj Raghav (Samsung)
2024-02-26 9:49 ` [PATCH 09/13] mm: do not split a folio if it has minimum folio order requirement Pankaj Raghav (Samsung)
2024-02-26 9:49 ` [PATCH 10/13] iomap: fix iomap_dio_zero() for fs bs > system page size Pankaj Raghav (Samsung)
2024-02-26 17:58 ` Matthew Wilcox
2024-02-27 9:33 ` Pankaj Raghav (Samsung)
2024-02-26 9:49 ` [PATCH 11/13] xfs: expose block size in stat Pankaj Raghav (Samsung)
2024-02-26 12:44 ` Dave Chinner
2024-02-27 8:53 ` Pankaj Raghav (Samsung)
2024-02-26 9:49 ` [PATCH 12/13] xfs: make the calculation generic in xfs_sb_validate_fsb_count() Pankaj Raghav (Samsung)
2024-02-26 12:47 ` Dave Chinner
2024-02-26 13:21 ` Matthew Wilcox
2024-02-27 8:44 ` Pankaj Raghav (Samsung)
2024-02-26 9:49 ` [PATCH 13/13] xfs: enable block size larger than page size support Pankaj Raghav (Samsung)
2024-02-26 13:26 ` Matthew Wilcox
2024-02-26 21:18 ` Dave Chinner
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