sunrpc: introduce the concept of a minimum number of threads per pool

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Add a new pool->sp_nrthrmin field to track the minimum number of threads
in a pool. Add min_threads parameters to both svc_set_num_threads() and
svc_set_pool_threads(). If min_threads is non-zero and less than the
max, svc_set_num_threads() will ensure that the number of running
threads is between the min and the max.

If the min is 0 or greater than the max, then it is ignored, and the
maximum number of threads will be started, and never spun down.

For now, the min_threads is always 0, but a later patch will pass the
proper value through from nfsd.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

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This commit is contained in:

Jeff Layton 2026-01-06 13:59:46 -05:00 • committed by Chuck Lever

parent 6cd60f4274

commit 7ffc7ade2c

5 changed files with 52 additions and 21 deletions

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4

fs/lockd/svc.c

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8

fs/nfs/callback.c

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8

fs/nfsd/nfssvc.c

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8

include/linux/sunrpc/svc.h

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45

net/sunrpc/svc.c

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