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List:       linux-cifs
Subject:    Re: [RFC PATCH 7/7] cifs: Use netfslib to handle reads
From:       David Howells <dhowells () redhat ! com>
Date:       2022-02-28 14:28:27
Message-ID: 2498968.1646058507 () warthog ! procyon ! org ! uk
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Rohith Surabattula <rohiths.msft@gmail.com> wrote:

> R=00000006 READAHEAD c=00000000 ni=0 s=0 1000
>               vi-1631    [000] .....  2519.247540: netfs_read:

"c=00000000" would indicate that no fscache cookie was allocated for this
inode.

> COOKIE   VOLUME   REF ACT ACC S FL DEF
> ======== ======== === === === = == ================
> 00000002 00000001   1   0   0 - 4008 302559bec76a7924,
> 0a13e961000000000a13e96100000000d01f4719d01f4719
> 00000003 00000001   1   0   0 - 4000 0000000000640090,
> 37630162000000003763016200000000e8650f119c49f411

But we can see some cookies have been allocated.

Can you turn on:

  echo 1 >/sys/kernel/debug/tracing/events/fscache/fscache_acquire/enable

David

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