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(parent: 9b9feec) | patch
NFSv4: Protect the state recovery thread against direct reclaim
authorTrond Myklebust <trond.myklebust@hammerspace.com>
Sat, 29 Jan 2022 18:32:45 +0000 (13:32 -0500)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 13 Apr 2022 19:01:01 +0000 (21:01 +0200)
commit4a2544ce244bd27825a940824d1084505188695a
tree1f4b37ec705882680668c9916d501ed57a2fbc8ctree
parent9b9feec97c1fc7dd9bb69f62c4905cddf1801599commit | diff
NFSv4: Protect the state recovery thread against direct reclaim

[ Upstream commit 3e17898aca293a24dae757a440a50aa63ca29671 ]

If memory allocation triggers a direct reclaim from the state recovery
thread, then we can deadlock. Use memalloc_nofs_save/restore to ensure
that doesn't happen.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
fs/nfs/nfs4state.c diff | blob | blame | history
Linux 6.x block layer and io_uring tree(s)