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Date:   Tue, 5 May 2020 09:45:11 +0200
From:   Greg KH <gregkh@linuxfoundation.org>
To:     SeongJae Park <sjpark@amazon.com>
Cc:     davem@davemloft.net, viro@zeniv.linux.org.uk, kuba@kernel.org,
        edumazet@google.com, netdev@vger.kernel.org,
        linux-kernel@vger.kernel.org, SeongJae Park <sjpark@amazon.de>
Subject: Re: [PATCH net 1/2] Revert "coallocate socket_wq with socket itself"
Message-ID: <20200505074511.GA4054974@kroah.com>
References: <20200505072841.25365-1-sjpark@amazon.com>
 <20200505072841.25365-2-sjpark@amazon.com>
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On Tue, May 05, 2020 at 09:28:40AM +0200, SeongJae Park wrote:
> From: SeongJae Park <sjpark@amazon.de>
> 
> This reverts commit 333f7909a8573145811c4ab7d8c9092301707721.
> 
> The commit 6d7855c54e1e ("sockfs: switch to ->free_inode()") made the
> deallocation of 'socket_alloc' to be done asynchronously using RCU, as
> same to 'sock.wq'.  And the following commit 333f7909a857 ("coallocate
> socket_sq with socket itself") made those to have same life cycle.
> 
> The changes made the code much more simple, but also made 'socket_alloc'
> live longer than before.  For the reason, user programs intensively
> repeating allocations and deallocations of sockets could cause memory
> pressure on recent kernels.
> 
> To avoid the problem, this commit separates the life cycle of
> 'socket_alloc' and 'sock.wq' again.  The following commit will make the
> deallocation of 'socket_alloc' to be done synchronously again.
> ---

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