user/sven/linux.git/include/linux/bvec.h, branch v6.6.17

block: add a bvec_set_virt helper

2023-02-03T15:20:55Z

A small wrapper around bvec_set_page for callers that have a virtual address. Signed-off-by: Christoph Hellwig Reviewed-by: Chaitanya Kulkarni Reviewed-by: Johannes Thumshirn Link: https://lore.kernel.org/r/20230203150634.3199647-4-hch@lst.de Signed-off-by: Jens Axboe

block: add a bvec_set_folio helper

2023-02-03T15:20:55Z

A smaller wrapper around bvec_set_page that takes a folio instead. There are only two potential users for this in the tree, but the number will grow in the future. Signed-off-by: Christoph Hellwig Reviewed-by: Chaitanya Kulkarni Reviewed-by: Johannes Thumshirn Link: https://lore.kernel.org/r/20230203150634.3199647-3-hch@lst.de Signed-off-by: Jens Axboe

block: factor out a bvec_set_page helper

2023-02-03T15:20:54Z

Add a helper to initialize a bvec based of a page pointer. This will help removing various open code bvec initializations. Signed-off-by: Christoph Hellwig Reviewed-by: Chaitanya Kulkarni Reviewed-by: Johannes Thumshirn Link: https://lore.kernel.org/r/20230203150634.3199647-2-hch@lst.de Signed-off-by: Jens Axboe

block: Remove mm.h from bvec.h

2023-01-31T16:21:50Z

This was originally added for the definition of nth_page(), but we no longer use nth_page() in this header, so we can drop the heavyweight mm.h now. Signed-off-by: Matthew Wilcox (Oracle) Link: https://lore.kernel.org/r/20230131050132.2627124-1-willy@infradead.org Signed-off-by: Jens Axboe

block: define 'struct bvec_iter' as packed

2021-10-18T12:17:36Z

'struct bvec_iter' is embedded into 'struct bio', define it as packed so that we can get one extra 4bytes for other uses without expanding bio. 'struct bvec_iter' is often allocated on stack, so making it packed doesn't affect performance. Also I have run io_uring on both nvme/null_blk, and not observe performance effect in this way. Suggested-by: Christoph Hellwig Signed-off-by: Ming Lei Reviewed-by: Sagi Grimberg Reviewed-by: Hannes Reinecke Signed-off-by: Christoph Hellwig Tested-by: Mark Wunderlich Link: https://lore.kernel.org/r/20211012111226.760968-14-hch@lst.de Signed-off-by: Jens Axboe

bvec: add a bvec_virt helper

2021-08-16T16:50:32Z

Add a helper to get the virtual address for a bvec. This avoids that all callers need to know about the page + offset representation. Signed-off-by: Christoph Hellwig Reviewed-by: Chaitanya Kulkarni Reviewed-by: Martin K. Petersen Link: https://lore.kernel.org/r/20210804095634.460779-2-hch@lst.de Signed-off-by: Jens Axboe

bvec: add memcpy_{from,to}_bvec and memzero_bvec helper

2021-08-02T19:37:27Z

Add helpers to perform common memory operation on a bvec. Signed-off-by: Christoph Hellwig Reviewed-by: Chaitanya Kulkarni Reviewed-by: Martin K. Petersen Reviewed-by: Ira Weiny Link: https://lore.kernel.org/r/20210727055646.118787-5-hch@lst.de Signed-off-by: Jens Axboe

bvec: add a bvec_kmap_local helper

2021-08-02T19:37:27Z

Add a helper to call kmap_local_page on a bvec. There is no need for an unmap helper given that kunmap_local accept any address in the mapped page. Signed-off-by: Christoph Hellwig Reviewed-by: Chaitanya Kulkarni Reviewed-by: Martin K. Petersen Reviewed-by: Ira Weiny Link: https://lore.kernel.org/r/20210727055646.118787-4-hch@lst.de Signed-off-by: Jens Axboe

bvec: fix the include guards for bvec.h

2021-08-02T19:37:27Z

Fix the include guards to match the file naming. Signed-off-by: Christoph Hellwig Reviewed-by: Bart Van Assche Reviewed-by: Chaitanya Kulkarni Reviewed-by: Martin K. Petersen Reviewed-by: Ira Weiny Link: https://lore.kernel.org/r/20210727055646.118787-3-hch@lst.de Signed-off-by: Jens Axboe

block: optimise for_each_bvec() advance

2020-12-02T16:46:55Z

Because of how for_each_bvec() works it never advances across multiple entries at a time, so bvec_iter_advance() is an overkill. Add specialised bvec_iter_advance_single() that is faster. It also handles zero-len bvecs, so can kill bvec_iter_skip_zero_bvec(). text data bss dec hex filename before: 23977 805 0 24782 60ce lib/iov_iter.o before, bvec_iter_advance() w/o WARN_ONCE() 22886 600 0 23486 5bbe ./lib/iov_iter.o after: 21862 600 0 22462 57be lib/iov_iter.o Signed-off-by: Pavel Begunkov Reviewed-by: Ming Lei Reviewed-by: Christoph Hellwig Signed-off-by: Jens Axboe