linux-dev/drivers/block/xen-blkback, branch linus/master

xen-blkback: use bdev_discard_alignment

2022-05-04T11:24:40Z

Use bdev_discard_alignment to calculate the correct discard alignment offset even for partitions instead of just looking at the queue limit. Also switch to use bdev_discard_granularity to get rid of the last direct queue reference in xen_blkbk_discard. Signed-off-by: Christoph Hellwig Reviewed-by: Damien Le Moal Reviewed-by: Martin K. Petersen Link: https://lore.kernel.org/r/20220418045314.360785-12-hch@lst.de [axboe: fold in 'q' removal as it's now unused] Signed-off-by: Jens Axboe

block: decouple REQ_OP_SECURE_ERASE from REQ_OP_DISCARD

2022-04-18T01:49:59Z

Secure erase is a very different operation from discard in that it is a data integrity operation vs hint. Fully split the limits and helper infrastructure to make the separation more clear. Signed-off-by: Christoph Hellwig Reviewed-by: Martin K. Petersen Acked-by: Christoph Böhmwalder [drbd] Acked-by: Ryusuke Konishi [nifs2] Acked-by: Jaegeuk Kim [f2fs] Acked-by: Coly Li [bcache] Acked-by: David Sterba [btrfs] Acked-by: Chao Yu Reviewed-by: Chaitanya Kulkarni Link: https://lore.kernel.org/r/20220415045258.199825-27-hch@lst.de Signed-off-by: Jens Axboe

block: remove QUEUE_FLAG_DISCARD

2022-04-18T01:49:59Z

Just use a non-zero max_discard_sectors as an indicator for discard support, similar to what is done for write zeroes. The only places where needs special attention is the RAID5 driver, which must clear discard support for security reasons by default, even if the default stacking rules would allow for it. Signed-off-by: Christoph Hellwig Reviewed-by: Martin K. Petersen Acked-by: Christoph Böhmwalder [drbd] Acked-by: Jan Höppner [s390] Acked-by: Coly Li [bcache] Acked-by: David Sterba [btrfs] Reviewed-by: Chaitanya Kulkarni Link: https://lore.kernel.org/r/20220415045258.199825-25-hch@lst.de Signed-off-by: Jens Axboe

block: add a bdev_write_cache helper

2022-04-18T01:49:59Z

Add a helper to check the write cache flag based on the block_device instead of having to poke into the block layer internal request_queue. Signed-off-by: Christoph Hellwig Reviewed-by: Martin K. Petersen Acked-by: David Sterba [btrfs] Reviewed-by: Chaitanya Kulkarni Link: https://lore.kernel.org/r/20220415045258.199825-13-hch@lst.de Signed-off-by: Jens Axboe

Merge tag 'for-5.18/drivers-2022-04-01' of git://git.kernel.dk/linux-block

2022-04-01T23:26:57Z

Pull block driver fixes from Jens Axboe: "Followup block driver updates and fixes for the 5.18-rc1 merge window. In detail: - NVMe pull request - Fix multipath hang when disk goes live over reconnect (Anton Eidelman) - fix RCU hole that allowed for endless looping in multipath round robin (Chris Leech) - remove redundant assignment after left shift (Colin Ian King) - add quirks for Samsung X5 SSDs (Monish Kumar R) - fix the read-only state for zoned namespaces with unsupposed features (Pankaj Raghav) - use a private workqueue instead of the system workqueue in nvmet (Sagi Grimberg) - allow duplicate NSIDs for private namespaces (Sungup Moon) - expose use_threaded_interrupts read-only in sysfs (Xin Hao)" - nbd minor allocation fix (Zhang) - drbd fixes and maintainer addition (Lars, Jakob, Christoph) - n64cart build fix (Jackie) - loop compat ioctl fix (Carlos) - misc fixes (Colin, Dongli)" * tag 'for-5.18/drivers-2022-04-01' of git://git.kernel.dk/linux-block: drbd: remove check of list iterator against head past the loop body drbd: remove usage of list iterator variable after loop nbd: fix possible overflow on 'first_minor' in nbd_dev_add() MAINTAINERS: add drbd co-maintainer drbd: fix potential silent data corruption loop: fix ioctl calls using compat_loop_info nvme-multipath: fix hang when disk goes live over reconnect nvme: fix RCU hole that allowed for endless looping in multipath round robin nvme: allow duplicate NSIDs for private namespaces nvmet: remove redundant assignment after left shift nvmet: use a private workqueue instead of the system workqueue nvme-pci: add quirks for Samsung X5 SSDs nvme-pci: expose use_threaded_interrupts read-only in sysfs nvme: fix the read-only state for zoned namespaces with unsupposed features n64cart: convert bi_disk to bi_bdev->bd_disk fix build xen/blkfront: fix comment for need_copy xen-blkback: remove redundant assignment to variable i

Merge tag 'folio-5.18c' of git://git.infradead.org/users/willy/pagecache

2022-03-23T00:03:12Z

Pull folio updates from Matthew Wilcox: - Rewrite how munlock works to massively reduce the contention on i_mmap_rwsem (Hugh Dickins): https://lore.kernel.org/linux-mm/8e4356d-9622-a7f0-b2c-f116b5f2efea@google.com/ - Sort out the page refcount mess for ZONE_DEVICE pages (Christoph Hellwig): https://lore.kernel.org/linux-mm/20220210072828.2930359-1-hch@lst.de/ - Convert GUP to use folios and make pincount available for order-1 pages. (Matthew Wilcox) - Convert a few more truncation functions to use folios (Matthew Wilcox) - Convert page_vma_mapped_walk to use PFNs instead of pages (Matthew Wilcox) - Convert rmap_walk to use folios (Matthew Wilcox) - Convert most of shrink_page_list() to use a folio (Matthew Wilcox) - Add support for creating large folios in readahead (Matthew Wilcox) * tag 'folio-5.18c' of git://git.infradead.org/users/willy/pagecache: (114 commits) mm/damon: minor cleanup for damon_pa_young selftests/vm/transhuge-stress: Support file-backed PMD folios mm/filemap: Support VM_HUGEPAGE for file mappings mm/readahead: Switch to page_cache_ra_order mm/readahead: Align file mappings for non-DAX mm/readahead: Add large folio readahead mm: Support arbitrary THP sizes mm: Make large folios depend on THP mm: Fix READ_ONLY_THP warning mm/filemap: Allow large folios to be added to the page cache mm: Turn can_split_huge_page() into can_split_folio() mm/vmscan: Convert pageout() to take a folio mm/vmscan: Turn page_check_references() into folio_check_references() mm/vmscan: Account large folios correctly mm/vmscan: Optimise shrink_page_list for non-PMD-sized folios mm/vmscan: Free non-shmem folios without splitting them mm/rmap: Constify the rmap_walk_control argument mm/rmap: Convert rmap_walk() to take a folio mm: Turn page_anon_vma() into folio_anon_vma() mm/rmap: Turn page_lock_anon_vma_read() into folio_lock_anon_vma_read() ...

fs: Move many prototypes to pagemap.h

2022-03-21T16:59:02Z

These functions are page cache functionality and don't need to be declared in fs.h. Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: Christoph Hellwig Reviewed-by: Miaohe Lin

xen-blkback: remove redundant assignment to variable i

2022-03-21T12:31:36Z

Variable i is being assigned a value that is never read, it is being re-assigned later in a for-loop. The assignment is redundant and can be removed. Cleans up clang scan build warning: drivers/block/xen-blkback/blkback.c:934:14: warning: Although the value stored to 'i' is used in the enclosing expression, the value is never actually read from 'i' [deadcode.DeadStores] Signed-off-by: Colin Ian King Acked-by: Roger Pau Monné Reviewed-by: Chaitanya Kulkarni Link: https://lore.kernel.org/r/20220317234646.78158-1-colin.i.king@gmail.com Signed-off-by: Jens Axboe

block: pass a block_device and opf to bio_alloc

2022-02-02T14:49:59Z

Pass the block_device and operation that we plan to use this bio for to bio_alloc to optimize the assignment. NULL/0 can be passed, both for the passthrough case on a raw request_queue and to temporarily avoid refactoring some nasty code. Also move the gfp_mask argument after the nr_vecs argument for a much more logical calling convention matching what most of the kernel does. Signed-off-by: Christoph Hellwig Reviewed-by: Chaitanya Kulkarni Link: https://lore.kernel.org/r/20220124091107.642561-18-hch@lst.de Signed-off-by: Jens Axboe

xen-blkback: bio_alloc can't fail if it is allow to sleep

2022-02-02T14:49:59Z

Remove handling of NULL returns from sleeping bio_alloc calls given that those can't fail. Signed-off-by: Christoph Hellwig Link: https://lore.kernel.org/r/20220124091107.642561-13-hch@lst.de Signed-off-by: Jens Axboe