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writeback: use the folio_batch queue iterator

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Instead of keeping our own local iterator variable, use the one just added
to folio_batch.

Link: https://lkml.kernel.org/r/20240215063649.2164017-12-hch@lst.de
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Acked-by: Dave Chinner <dchinner@redhat.com>
Cc: Christian Brauner <brauner@kernel.org>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2024-02-15 07:36:46 +01:00 committed by Andrew Morton
parent 535c5d9dad
commit e6d0ab87c8
1 changed files with 15 additions and 13 deletions
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28
mm/page-writeback.c
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@ -2406,13 +2406,21 @@ static pgoff_t wbc_end(struct writeback_control *wbc)
return wbc->range_end >> PAGE_SHIFT;
}
static void writeback_get_batch(struct address_space *mapping,
static struct folio *writeback_get_folio(struct address_space *mapping,
struct writeback_control *wbc)
{
folio_batch_release(&wbc->fbatch);
cond_resched();
filemap_get_folios_tag(mapping, &wbc->index, wbc_end(wbc),
wbc_to_tag(wbc), &wbc->fbatch);
struct folio *folio;
folio = folio_batch_next(&wbc->fbatch);
if (!folio) {
folio_batch_release(&wbc->fbatch);
cond_resched();
filemap_get_folios_tag(mapping, &wbc->index, wbc_end(wbc),
wbc_to_tag(wbc), &wbc->fbatch);
folio = folio_batch_next(&wbc->fbatch);
}
return folio;
}
/**
@ -2454,7 +2462,6 @@ int write_cache_pages(struct address_space *mapping,
int error;
struct folio *folio;
pgoff_t end; /* Inclusive */
int i = 0;
if (wbc->range_cyclic) {
wbc->index = mapping->writeback_index; /* prev offset */
@ -2469,15 +2476,10 @@ int write_cache_pages(struct address_space *mapping,
folio_batch_init(&wbc->fbatch);
for (;;) {
if (i == wbc->fbatch.nr) {
writeback_get_batch(mapping, wbc);
i = 0;
}
if (wbc->fbatch.nr == 0)
folio = writeback_get_folio(mapping, wbc);
if (!folio)
break;
folio = wbc->fbatch.folios[i++];
folio_lock(folio);
if (!folio_prepare_writeback(mapping, wbc, folio)) {
folio_unlock(folio);