linux-kernel - [PATCH v2 0/2] Fixes for fscache volume operations

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Message-Id: <20221226103309.953112-1-houtao@huaweicloud.com>
Date:   Mon, 26 Dec 2022 18:33:07 +0800
From:   Hou Tao <houtao@...weicloud.com>
To:     linux-cachefs@...hat.com
Cc:     David Howells <dhowells@...hat.com>,
        Jeff Layton <jlayton@...nel.org>, linux-erofs@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org,
        Jingbo Xu <jefflexu@...ux.alibaba.com>, houtao1@...wei.com
Subject: [PATCH v2 0/2] Fixes for fscache volume operations

From: Hou Tao <houtao1@...wei.com>

Hi,

The patchset includes two fixes for fscache volume operations: patch 1
fixes the hang problem during volume acquisition when the volume
acquisition process waits for the freeing of relinquished volume, patch
2 adds the missing memory barrier in fscache_create_volume_work() and it
is spotted through code review when checking whether or not these is
missing smp_mb() before invoking wake_up_bit().

Comments are always welcome.

Chang Log:
v2:
 * rebased on v6.1-rc1
 * Patch 1: use wait_on_bit() instead (Suggested by David)
 * Patch 2: add the missing smp_mb() in fscache_create_volume_work()

v1: https://listman.redhat.com/archives/linux-cachefs/2022-December/007384.html

Hou Tao (2):
  fscache: Use wait_on_bit() to wait for the freeing of relinquished
    volume
  fscache: Add the missing smp_mb__after_atomic() before wake_up_bit()

 fs/fscache/volume.c | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

-- 
2.29.2