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From:   Ming Lei <ming.lei@redhat.com>
To:     Jens Axboe <axboe@kernel.dk>
Cc:     linux-block@vger.kernel.org, Christoph Hellwig <hch@lst.de>,
        linux-kernel@vger.kernel.org, Ming Lei <ming.lei@redhat.com>
Subject: [PATCH 0/2] blktrace: fix trace buffer leak and limit trace buffer size
Date:   Tue, 23 Mar 2021 16:14:38 +0800
Message-Id: <20210323081440.81343-1-ming.lei@redhat.com>
MIME-Version: 1.0
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Precedence: bulk

blktrace may pass big trace buffer size via '-b', meantime the system
may have lots of CPU cores, so too much memory can be allocated for
blktrace.

The 1st patch shutdown bltrace in blkdev_close() in case of task
exiting, for avoiding trace buffer leak.

The 2nd patch limits max trace buffer size for avoiding potential
OOM.


Ming Lei (2):
  block: shutdown blktrace in case of fatal signal pending
  blktrace: limit allowed total trace buffer size

 fs/block_dev.c          |  6 ++++++
 kernel/trace/blktrace.c | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 38 insertions(+)

-- 
2.29.2