[PATCH] splice: call handle_ra_miss() on failure to lookup page
Notify the readahead logic of the missing page. Suggested by Oleg Nesterov. Signed-off-by: Jens Axboe <axboe@suse.de>
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@ -301,6 +301,12 @@ __generic_file_splice_read(struct file *in, loff_t *ppos,
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*/
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*/
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page = find_get_page(mapping, index);
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page = find_get_page(mapping, index);
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if (!page) {
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if (!page) {
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/*
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* Make sure the read-ahead engine is notified
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* about this failure.
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*/
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handle_ra_miss(mapping, &in->f_ra, index);
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/*
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/*
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* page didn't exist, allocate one.
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* page didn't exist, allocate one.
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*/
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*/
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