user/sven/linux.git/block/bounce.c, branch v5.15.2

block: use memcpy_from_bvec in __blk_queue_bounce

2021-08-02T19:37:28Z

Rewrite the actual bounce buffering loop in __blk_queue_bounce to that the memcpy_to_bvec helper can be used to perform the data copies. Signed-off-by: Christoph Hellwig Reviewed-by: Martin K. Petersen Link: https://lore.kernel.org/r/20210727055646.118787-14-hch@lst.de Signed-off-by: Jens Axboe

block: use memcpy_to_bvec in copy_to_high_bio_irq

2021-08-02T19:37:28Z

Use memcpy_to_bvec instead of opencoding the logic. Signed-off-by: Christoph Hellwig Reviewed-by: Martin K. Petersen Link: https://lore.kernel.org/r/20210727055646.118787-12-hch@lst.de Signed-off-by: Jens Axboe

block: stop calling blk_queue_bounce for passthrough requests

2021-04-06T15:28:18Z

Instead of overloading the passthrough fast path with the deprecated block layer bounce buffering let the users that combine an old undermaintained driver with a highmem system pay the price by always falling back to copies in that case. Signed-off-by: Christoph Hellwig Acked-by: Martin K. Petersen Reviewed-by: Hannes Reinecke Link: https://lore.kernel.org/r/20210331073001.46776-9-hch@lst.de Signed-off-by: Jens Axboe

block: refactor the bounce buffering code

2021-04-06T15:28:17Z

Get rid of all the PFN arithmetics and just use an enum for the two remaining options, and use PageHighMem for the actual bounce decision. Add a fast path to entirely avoid the call for the common case of a queue not using the legacy bouncing code. Signed-off-by: Christoph Hellwig Acked-by: Martin K. Petersen Reviewed-by: Hannes Reinecke Link: https://lore.kernel.org/r/20210331073001.46776-8-hch@lst.de Signed-off-by: Jens Axboe

block: remove BLK_BOUNCE_ISA support

2021-04-06T15:28:17Z

Remove the BLK_BOUNCE_ISA support now that all users are gone. Signed-off-by: Christoph Hellwig Acked-by: Martin K. Petersen Reviewed-by: Hannes Reinecke Link: https://lore.kernel.org/r/20210331073001.46776-7-hch@lst.de Signed-off-by: Jens Axboe

block: rename BIO_MAX_PAGES to BIO_MAX_VECS

2021-03-11T14:47:48Z

Ever since the addition of multipage bio_vecs BIO_MAX_PAGES has been horribly confusingly misnamed. Rename it to BIO_MAX_VECS to stop confusing users of the bio API. Signed-off-by: Christoph Hellwig Reviewed-by: Matthew Wilcox (Oracle) Reviewed-by: Martin K. Petersen Link: https://lore.kernel.org/r/20210311110137.1132391-2-hch@lst.de Signed-off-by: Jens Axboe

block: memory allocations in bounce_clone_bio must not fail

2021-02-24T15:55:00Z

The caller can't cope with a failure from bounce_clone_bio, so use __GFP_NOFAIL for the passthrough case. bio_alloc_bioset already won't fail due to the use of mempools. And yes, we need to get rid of this bock layer bouncing code entirely sooner or later.. Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe

block: remove the gfp_mask argument to bounce_clone_bio

2021-02-24T15:55:00Z

The only caller always passes GFP_NOIO. Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe

block: fix bounce_clone_bio for passthrough bios

2021-02-24T15:55:00Z

Now that bio_alloc_bioset does not fall back to kmalloc for a NULL bio_set, handle that case explicitly and simplify the calling conventions. Based on an earlier patch from Chaitanya Kulkarni. Fixes: 3175199ab0ac ("block: split bio_kmalloc from bio_alloc_bioset") Reported-by: Chaitanya Kulkarni Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe

block: inherit BIO_REMAPPED when cloning bios

2021-01-26T15:50:01Z

Cloned bios are can be used to on the same device, in which case we need to inherit the BIO_REMAPPED flag to avoid a double partition remap. When the cloned bios are used on another device, bio_set_dev will clear the flag. Fixes: 309dca309fc3 ("block: store a block_device pointer in struct bio") Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe