linux-kernel - Re: [PATCH net 2/2] Revert "sockfs: switch to ->free

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Date:   Tue, 5 May 2020 09:45:35 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     SeongJae Park <sjpark@...zon.com>
Cc:     davem@...emloft.net, viro@...iv.linux.org.uk, kuba@...nel.org,
        edumazet@...gle.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, SeongJae Park <sjpark@...zon.de>
Subject: Re: [PATCH net 2/2] Revert "sockfs: switch to ->free_inode()"

On Tue, May 05, 2020 at 09:28:41AM +0200, SeongJae Park wrote:
> From: SeongJae Park <sjpark@...zon.de>
> 
> This reverts commit 6d7855c54e1e269275d7c504f8f62a0b7a5b3f18.
> 
> 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'.
> 
> The change made 'socket_alloc' live longer than before.  As a result,
> user programs intensively repeating allocations and deallocations of
> sockets could cause memory pressure on recent kernels.
> 
> To avoid the problem, this commit reverts the change.
> ---
>  net/socket.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)

Same problems here as in patch 1/2 :(