bcache: allocate meta data pages as compound pages
commit 5fe48867 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:
Paul Gortmaker <paul.gortmaker@windriver.com>
parent
96ef36af
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