There are some meta data of bcache are allocated by multiple pages, and they are used as bio bv_page for I/Os to the cache device. for example cache_set->uuids, cache->disk_buckets, journal_write->data, bset_tree->data.
For such meta data memory, all the allocated pages should be treated as a single memory block. Then the memory management and underlying I/O code can treat them more clearly.
This patch adds __GFP_COMP flag to all the location allocating >0 order pages for the above mentioned meta data. Then their pages are treated as compound pages now.
Signed-off-by: Coly Li colyli@suse.de Cc: Chaitanya Kulkarni chaitanya.kulkarni@wdc.com Cc: Christoph Hellwig hch@lst.de Cc: Hannes Reinecke hare@suse.de Cc: Jan Kara jack@suse.com Cc: Jens Axboe axboe@kernel.dk Cc: Mikhail Skorzhinskii mskorzhinskiy@solarflare.com Cc: Philipp Reisner philipp.reisner@linbit.com Cc: Sagi Grimberg sagi@grimberg.me Cc: Vlastimil Babka vbabka@suse.com Cc: stable@vger.kernel.org --- drivers/md/bcache/bset.c | 2 +- drivers/md/bcache/btree.c | 2 +- drivers/md/bcache/journal.c | 4 ++-- drivers/md/bcache/super.c | 2 +- 4 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/md/bcache/bset.c b/drivers/md/bcache/bset.c index 4995fcaefe29..67a2c47f4201 100644 --- a/drivers/md/bcache/bset.c +++ b/drivers/md/bcache/bset.c @@ -322,7 +322,7 @@ int bch_btree_keys_alloc(struct btree_keys *b,
b->page_order = page_order;
- t->data = (void *) __get_free_pages(gfp, b->page_order); + t->data = (void *) __get_free_pages(__GFP_COMP|gfp, b->page_order); if (!t->data) goto err;
diff --git a/drivers/md/bcache/btree.c b/drivers/md/bcache/btree.c index 6548a601edf0..dd116c83de80 100644 --- a/drivers/md/bcache/btree.c +++ b/drivers/md/bcache/btree.c @@ -785,7 +785,7 @@ int bch_btree_cache_alloc(struct cache_set *c) mutex_init(&c->verify_lock);
c->verify_ondisk = (void *) - __get_free_pages(GFP_KERNEL, ilog2(bucket_pages(c))); + __get_free_pages(GFP_KERNEL|__GFP_COMP, ilog2(bucket_pages(c)));
c->verify_data = mca_bucket_alloc(c, &ZERO_KEY, GFP_KERNEL);
diff --git a/drivers/md/bcache/journal.c b/drivers/md/bcache/journal.c index 90aac4e2333f..d8586b6ccb76 100644 --- a/drivers/md/bcache/journal.c +++ b/drivers/md/bcache/journal.c @@ -999,8 +999,8 @@ int bch_journal_alloc(struct cache_set *c) j->w[1].c = c;
if (!(init_fifo(&j->pin, JOURNAL_PIN, GFP_KERNEL)) || - !(j->w[0].data = (void *) __get_free_pages(GFP_KERNEL, JSET_BITS)) || - !(j->w[1].data = (void *) __get_free_pages(GFP_KERNEL, JSET_BITS))) + !(j->w[0].data = (void *) __get_free_pages(GFP_KERNEL|__GFP_COMP, JSET_BITS)) || + !(j->w[1].data = (void *) __get_free_pages(GFP_KERNEL|__GFP_COMP, JSET_BITS))) return -ENOMEM;
return 0; diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c index 2014016f9a60..daa4626024a2 100644 --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -1776,7 +1776,7 @@ void bch_cache_set_unregister(struct cache_set *c) }
#define alloc_bucket_pages(gfp, c) \ - ((void *) __get_free_pages(__GFP_ZERO|gfp, ilog2(bucket_pages(c)))) + ((void *) __get_free_pages(__GFP_ZERO|__GFP_COMP|gfp, ilog2(bucket_pages(c))))
struct cache_set *bch_cache_set_alloc(struct cache_sb *sb) {