RDMA/rxe: Limit the number of calls to each tasklet

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[ Upstream commit eff6d998ca ]

Limit the maximum number of calls to each tasklet from rxe_do_task()
before yielding the cpu. When the limit is reached reschedule the tasklet
and exit the calling loop. This patch prevents one tasklet from consuming
100% of a cpu core and causing a deadlock or soft lockup.

Link: https://lore.kernel.org/r/20220630190425.2251-9-rpearsonhpe@gmail.com
Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Bob Pearson 2022-06-30 14:04:25 -05:00 • committed by Greg Kroah-Hartman

parent f03d253ba7

commit 0a5e36832f

2 changed files with 18 additions and 4 deletions

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6

drivers/infiniband/sw/rxe/rxe_param.h

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16

drivers/infiniband/sw/rxe/rxe_task.c

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