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Date: Tue, 28 Dec 2021 23:13:50 +0800 From: Wen Gu <guwen@...ux.alibaba.com> To: kgraul@...ux.ibm.com, davem@...emloft.net, kuba@...nel.org Cc: linux-s390@...r.kernel.org, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, dust.li@...ux.alibaba.com, tonylu@...ux.alibaba.com Subject: [RFC PATCH net v2 0/2] net/smc: Fix for race in smc link group termination We encountered some crashes recently and they are caused by the race between the access and free of link/link group in smc link group termination. The crashes can be reproduced in frequent abnormal link group termination, like set RNICs up/down. This set of patches tries to fix this by extending the life cycle of link/link group to ensure that they won't be referred to after cleared or freed. v1->v2 - Declare __smcr_link_clear() as 'static' Best wishes, Wen Gu Wen Gu (2): net/smc: Resolve the race between link group access and termination net/smc: Resolve the race between SMC-R link access and clear net/smc/smc.h | 1 + net/smc/smc_core.c | 80 ++++++++++++++++++++++++++++++++++++++++++++++++------ net/smc/smc_core.h | 7 +++++ 3 files changed, 79 insertions(+), 9 deletions(-) -- 1.8.3.1
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