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Registered in England and Wales under Company Registration No. 3798903 Subject: [RFC PATCH 6/6] mm: Pass a file_ra_state struct into force_page_cache_readahead() [ver #2] From: David Howells To: willy@infradead.org Cc: dhowells@redhat.com, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Date: Wed, 02 Sep 2020 16:45:00 +0100 Message-ID: <159906150036.663183.11566577279669811013.stgit@warthog.procyon.org.uk> In-Reply-To: <159906145700.663183.3678164182141075453.stgit@warthog.procyon.org.uk> References: <159906145700.663183.3678164182141075453.stgit@warthog.procyon.org.uk> User-Agent: StGit/0.23 MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Rspamd-Queue-Id: 1D07E18140B69 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam02 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Pass a file_ra_state struct into force_page_cache_readahead(). One caller has one that should be passed in and the other doesn't, but the former needs to pass its in. Signed-off-by: David Howells --- mm/fadvise.c | 3 ++- mm/internal.h | 3 ++- mm/readahead.c | 5 ++--- 3 files changed, 6 insertions(+), 5 deletions(-) diff --git a/mm/fadvise.c b/mm/fadvise.c index 997f7c16690a..e1b09975caaa 100644 --- a/mm/fadvise.c +++ b/mm/fadvise.c @@ -106,7 +106,8 @@ int generic_fadvise(struct file *file, loff_t offset, loff_t len, int advice) { DEFINE_READAHEAD(rac, file, mapping, start_index); - force_page_cache_readahead(&rac, nrpages); + force_page_cache_readahead(&rac, &rac.file->f_ra, + nrpages); } break; case POSIX_FADV_NOREUSE: diff --git a/mm/internal.h b/mm/internal.h index d62df5559500..ff7b549f6a9d 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -49,7 +49,8 @@ void unmap_page_range(struct mmu_gather *tlb, unsigned long addr, unsigned long end, struct zap_details *details); -void force_page_cache_readahead(struct readahead_control *, unsigned long); +void force_page_cache_readahead(struct readahead_control *, struct file_ra_state *, + unsigned long); void __do_page_cache_readahead(struct readahead_control *, unsigned long nr_to_read, unsigned long lookahead_size); diff --git a/mm/readahead.c b/mm/readahead.c index d8e3e59e4c46..3f3ce65afc64 100644 --- a/mm/readahead.c +++ b/mm/readahead.c @@ -272,11 +272,10 @@ void __do_page_cache_readahead(struct readahead_control *rac, * memory at once. */ void force_page_cache_readahead(struct readahead_control *rac, - unsigned long nr_to_read) + struct file_ra_state *ra, unsigned long nr_to_read) { struct address_space *mapping = rac->mapping; struct backing_dev_info *bdi = inode_to_bdi(mapping->host); - struct file_ra_state *ra = &rac->file->f_ra; unsigned long max_pages, index; if (unlikely(!mapping->a_ops->readpage && !mapping->a_ops->readpages && @@ -655,7 +654,7 @@ void page_cache_sync_readahead(struct readahead_control *rac, /* be dumb */ if (rac->file && (rac->file->f_mode & FMODE_RANDOM)) { - force_page_cache_readahead(rac, req_count); + force_page_cache_readahead(rac, ra, req_count); return; }