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1122c0c1cc
Move the cache control settings into the queue_limits so that the flags can be set atomically with the device queue frozen. Add new features and flags field for the driver set flags, and internal (usually sysfs-controlled) flags in the block layer. Note that we'll eventually remove enough field from queue_limits to bring it back to the previous size. The disable flag is inverted compared to the previous meaning, which means it now survives a rescan, similar to the max_sectors and max_discard_sectors user limits. The FLUSH and FUA flags are now inherited by blk_stack_limits, which simplified the code in dm a lot, but also causes a slight behavior change in that dm-switch and dm-unstripe now advertise a write cache despite setting num_flush_bios to 0. The I/O path will handle this gracefully, but as far as I can tell the lack of num_flush_bios and thus flush support is a pre-existing data integrity bug in those targets that really needs fixing, after which a non-zero num_flush_bios should be required in dm for targets that map to underlying devices. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Damien Le Moal <dlemoal@kernel.org> Reviewed-by: Hannes Reinecke <hare@suse.de> Link: https://lore.kernel.org/r/20240617060532.127975-14-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk> |
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badrange.c | ||
btt_devs.c | ||
btt.c | ||
btt.h | ||
bus.c | ||
claim.c | ||
core.c | ||
dax_devs.c | ||
dimm_devs.c | ||
dimm.c | ||
e820.c | ||
Kconfig | ||
label.c | ||
label.h | ||
Makefile | ||
namespace_devs.c | ||
nd_perf.c | ||
nd_virtio.c | ||
nd-core.h | ||
nd.h | ||
of_pmem.c | ||
pfn_devs.c | ||
pfn.h | ||
pmem.c | ||
pmem.h | ||
region_devs.c | ||
region.c | ||
security.c | ||
virtio_pmem.c | ||
virtio_pmem.h |