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bcache: allocate meta data pages as compound pages

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commit 5fe4886785 upstream.

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: stable@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Coly Li
2020-07-25 20:00:16 +08:00
committed by Chris
parent f09cb5fe1a
commit f155eb0fa3
4 changed files with 5 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/md/bcache/bset.c
View File

@@ -317,7 +317,7 @@ int bch_btree_keys_alloc(struct btree_keys *b, unsigned page_order, gfp_t gfp)
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;

2
drivers/md/bcache/btree.c
View File

@@ -790,7 +790,7 @@ 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);

4
drivers/md/bcache/journal.c
View File

@@ -839,8 +839,8 @@ 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;

2
drivers/md/bcache/super.c
View File

@@ -1468,7 +1468,7 @@ 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)
{