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blk_stack_limits() uses min_not_zero() when stacking discard limits. Thus an array containing devices with different discard capabilities can expose discard support as long as at least one member has a non-zero discard limit. raid0 and raid10 use md_submit_discard_bio() to submit a discard bio to each member covered by the request. The helper currently also submits bios to members whose max_discard_sectors is zero. The block layer completes these bios with BLK_STS_NOTSUPP, and bio chaining propagates that status to the original discard request. Discard is optional, so skip members which do not support it. Members that do support discard continue to receive their portion of the request. Signed-off-by: Wale Zhang <wale.zhang.ftd@gmail.com> Link: https://patch.msgid.link/20260731074729.1885314-1-wale.zhang.ftd@gmail.com Signed-off-by: Yu Kuai <yukuai@fygo.io>
11121 lines
286 KiB
11121 lines
286 KiB