linux-kernel - Re: [PATCH v1 2/3] Treewide: Stop corrupting socket's task

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Date:   Mon, 21 Nov 2022 14:43:29 -0700
From:   Shuah Khan <skhan@...uxfoundation.org>
To:     Benjamin Coddington <bcodding@...hat.com>,
        David Howells <dhowells@...hat.com>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Philipp Reisner <philipp.reisner@...bit.com>,
        Lars Ellenberg <lars.ellenberg@...bit.com>,
        Christoph Böhmwalder 
        <christoph.boehmwalder@...bit.com>, Jens Axboe <axboe@...nel.dk>,
        Josef Bacik <josef@...icpanda.com>,
        Keith Busch <kbusch@...nel.org>,
        Christoph Hellwig <hch@....de>,
        Sagi Grimberg <sagi@...mberg.me>,
        Lee Duncan <lduncan@...e.com>, Chris Leech <cleech@...hat.com>,
        Mike Christie <michael.christie@...cle.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Valentina Manea <valentina.manea.m@...il.com>,
        Shuah Khan <shuah@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Marc Dionne <marc.dionne@...istor.com>,
        Steve French <sfrench@...ba.org>,
        Christine Caulfield <ccaulfie@...hat.com>,
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        Latchesar Ionkov <lucho@...kov.net>,
        Dominique Martinet <asmadeus@...ewreck.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Ilya Dryomov <idryomov@...il.com>,
        Xiubo Li <xiubli@...hat.com>,
        Trond Myklebust <trond.myklebust@...merspace.com>,
        Anna Schumaker <anna@...nel.org>,
        Chuck Lever <chuck.lever@...cle.com>,
        Jeff Layton <jlayton@...nel.org>, drbd-dev@...ts.linbit.com,
        linux-block@...r.kernel.org, nbd@...er.debian.org,
        linux-nvme@...ts.infradead.org, open-iscsi@...glegroups.com,
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        ocfs2-devel@....oracle.com, v9fs-developer@...ts.sourceforge.net,
        ceph-devel@...r.kernel.org, linux-nfs@...r.kernel.org,
        Shuah Khan <skhan@...uxfoundation.org>
Subject: Re: [PATCH v1 2/3] Treewide: Stop corrupting socket's task_frag

On 11/21/22 14:40, Shuah Khan wrote:
> On 11/21/22 07:34, Benjamin Coddington wrote:
>> On 21 Nov 2022, at 8:56, David Howells wrote:
>>
>>> Benjamin Coddington <bcodding@...hat.com> wrote:
>>>
>>>> Since moving to memalloc_nofs_save/restore, SUNRPC has stopped setting the
>>>> GFP_NOIO flag on sk_allocation which the networking system uses to decide
>>>> when it is safe to use current->task_frag.
>>>
>>> Um, what's task_frag?
>>
>> Its a per-task page_frag used to coalesce small writes for networking -- see:
>>
>> 5640f7685831 net: use a per task frag allocator
>>
>> Ben
>>
>>
> 
> I am not seeing this in the mainline. Where can find this commit?
> 

Okay. I see this commit in the mainline. However, I don't see the
sk_use_task_frag in mainline.

thanks,
-- Shuah