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From:   SeongJae Park <sjpark@amazon.com>
To:     Greg KH <gregkh@linuxfoundation.org>
CC:     SeongJae Park <sjpark@amazon.com>, <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: Re: [PATCH net 2/2] Revert "sockfs: switch to ->free_inode()"
Date:   Tue, 5 May 2020 10:09:23 +0200
Message-ID: <20200505080923.6970-1-sjpark@amazon.com>
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On Tue, 5 May 2020 09:45:35 +0200 Greg KH <gregkh@linuxfoundation.org> wrote:

> On Tue, May 05, 2020 at 09:28:41AM +0200, SeongJae Park wrote:
> > From: SeongJae Park <sjpark@amazon.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 :(

Yes, indeed.  I will send next version right now.


Thanks,
SeongJae Park

>