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| author | Josef Bacik <josef@toxicpanda.com> | 2026-10-28 10:41:32 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2026-10-29 07:15:47 -0600 |
| commit | 620cfc7a664278a55d068ed88fff1242fddc4ef2 (patch) | |
| tree | 5c4d1cc749ec4c4008b69f8a7b439ccb93af3cb7 /tools/lib/python/kdoc | |
| parent | 24974185999fd80b676fbe2a6c7a97bbd38aaf3a (diff) | |
blk-mq: keep sharing tags fairly after a queue update
A hctx only gets BLK_MQ_F_TAG_QUEUE_SHARED from
blk_mq_add_queue_tag_set(). The hctxs blk_mq_update_nr_hw_queues()
allocates for queues that joined long ago never get it, so they aren't
counted in active_queues and hctx_may_queue() lets them take all the
tags. One NVMe namespace can starve the others after the first update.
Set the flag on the new hctxs.
Fixes: 868f2f0b7206 ("blk-mq: dynamic h/w context count")
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://patch.msgid.link/20261028164415.1262013-30-axboe@kernel.dk
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'tools/lib/python/kdoc')
0 files changed, 0 insertions, 0 deletions