linux-kernel - Re: [PATCH v2] net: 9p: advance iov on empty read

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Message-Id: <161482020724.32353.3785422808049340949.git-patchwork-notify@kernel.org>
Date:   Thu, 04 Mar 2021 01:10:07 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Jisheng Zhang <Jisheng.Zhang@...aptics.com>
Cc:     ericvh@...il.com, lucho@...kov.net, asmadeus@...ewreck.org,
        davem@...emloft.net, kuba@...nel.org,
        v9fs-developer@...ts.sourceforge.net, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] net: 9p: advance iov on empty read

Hello:

This patch was applied to netdev/net.git (refs/heads/master):

On Tue, 2 Mar 2021 17:19:32 +0800 you wrote:
> I met below warning when cating a small size(about 80bytes) txt file
> on 9pfs(msize=2097152 is passed to 9p mount option), the reason is we
> miss iov_iter_advance() if the read count is 0 for zerocopy case, so
> we didn't truncate the pipe, then iov_iter_pipe() thinks the pipe is
> full. Fix it by removing the exception for 0 to ensure to call
> iov_iter_advance() even on empty read for zerocopy case.
> 
> [...]

Here is the summary with links:
  - [v2] net: 9p: advance iov on empty read
    https://git.kernel.org/netdev/net/c/d65614a01d24

You are awesome, thank you!
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