From: "J. Bruce Fields" <bfields@redhat.com>
To: Anna Schumaker <schumaker.anna@gmail.com>
Cc: Christoph Hellwig <hch@infradead.org>, linux-nfs@vger.kernel.org
Subject: Re: [PATCH 41/52] nfsd4: turn off zero-copy-read in exotic cases
Date: Wed, 28 May 2014 10:23:20 -0400 [thread overview]
Message-ID: <20140528142320.GC13012@pad.redhat.com> (raw)
In-Reply-To: <5385EEF5.9050904@gmail.com>
On Wed, May 28, 2014 at 10:13:09AM -0400, Anna Schumaker wrote:
> On 05/28/2014 10:01 AM, J. Bruce Fields wrote:
> > On Wed, May 28, 2014 at 01:09:45AM -0700, Christoph Hellwig wrote:
> >> On Thu, May 22, 2014 at 03:32:16PM -0400, J. Bruce Fields wrote:
> >>> Later patches handle those "exotic compounds", this one just makes
> >>> sure zero-copy is turned off in those cases.
> >> How did you test these exotic compounds?
> > I have is a pynfs test that sends a compound with multiple reads in
> > it.
> >
> > I don't think that's pushed out to my regular pynfs tree, I'll try
> > to do that today.
> >
> > I could really use more of those. Maybe I'm wrong, but I'm worried
> > less about this case than the more finicky out-of-reply-space cases,
> > where I do have patches puporting to fix problems that I haven't
> > really verified.
>
> I'll eventually be using this case for READ_PLUS. I'll be sure to
> send problems your way! :)
Great, thanks.
Actually my main question there is how to handle 4.2 in pynfs.
4.1 and 4.0 are entirely separate codebases. We definitely don't want
to do that again.
There's not much point re-running all the 4.1 tests over 4.2. Maybe all
we may need is to say "use minor version 2 on this compound" in tests of
the new features.
But I haven't even tried to figure out how to tell pynfs about the new
.x files.
--b.
next prev parent reply other threads:[~2014-05-28 14:23 UTC|newest]
Thread overview: 67+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-22 19:31 xdr encoding fixes (v3) J. Bruce Fields
2014-05-22 19:31 ` [PATCH 01/52] nfsd4: READ, READDIR, etc., are idempotent J. Bruce Fields
2014-05-23 1:21 ` Kinglong Mee
2014-05-23 13:15 ` J. Bruce Fields
2014-05-22 19:31 ` [PATCH 02/52] nfsd4: allow larger 4.1 session drc slots J. Bruce Fields
2014-05-22 19:31 ` [PATCH 03/52] nfsd4: fill in some missing op_name's J. Bruce Fields
2014-05-22 19:31 ` [PATCH 04/52] nfsd4: decoding errors can still be cached and require space J. Bruce Fields
2014-05-22 19:31 ` [PATCH 05/52] nfsd4: read size estimate should include padding J. Bruce Fields
2014-05-22 19:31 ` [PATCH 06/52] nfsd4: fix write reply size estimate J. Bruce Fields
2014-05-22 19:31 ` [PATCH 07/52] nfsd4: embed xdr_stream in nfsd4_compoundres J. Bruce Fields
2014-05-22 19:31 ` [PATCH 08/52] nfsd4: tweak nfsd4_encode_getattr to take xdr_stream J. Bruce Fields
2014-05-22 19:31 ` [PATCH 09/52] nfsd4: move proc_compound xdr encode init to helper J. Bruce Fields
2014-05-22 19:31 ` [PATCH 10/52] nfsd4: reserve head space for krb5 integ/priv info J. Bruce Fields
2014-05-22 19:31 ` [PATCH 11/52] nfsd4: fix encoding of out-of-space replies J. Bruce Fields
2014-05-22 19:31 ` [PATCH 12/52] nfsd4: allow space for final error return J. Bruce Fields
2014-05-22 19:31 ` [PATCH 13/52] nfsd4: use xdr_reserve_space in attribute encoding J. Bruce Fields
2014-05-25 8:46 ` Kinglong Mee
2014-05-22 19:31 ` [PATCH 14/52] nfsd4: use xdr_stream throughout compound encoding J. Bruce Fields
2014-05-22 19:31 ` [PATCH 15/52] nfsd4: remove ADJUST_ARGS J. Bruce Fields
2014-05-22 19:31 ` [PATCH 16/52] nfsd4: no need for encode_compoundres to adjust lengths J. Bruce Fields
2014-05-22 19:31 ` [PATCH 17/52] nfsd4: keep xdr buf length updated J. Bruce Fields
2014-05-22 19:31 ` [PATCH 18/52] rpc: xdr_truncate_encode J. Bruce Fields
2014-05-22 19:31 ` [PATCH 19/52] nfsd4: use xdr_truncate_encode J. Bruce Fields
2014-05-22 19:31 ` [PATCH 20/52] nfsd4: "backfill" using write_bytes_to_xdr_buf J. Bruce Fields
2014-05-22 19:31 ` [PATCH 21/52] nfsd4: teach encoders to handle reserve_space failures J. Bruce Fields
2014-05-22 19:31 ` [PATCH 22/52] nfsd4: reserve space before inlining 0-copy pages J. Bruce Fields
2014-05-22 19:31 ` [PATCH 23/52] nfsd4: nfsd4_check_resp_size needn't recalculate length J. Bruce Fields
2014-05-22 19:31 ` [PATCH 24/52] nfsd4: remove redundant encode buffer size checking J. Bruce Fields
2014-05-22 19:32 ` [PATCH 25/52] nfsd4: size-checking cleanup J. Bruce Fields
2014-05-22 19:32 ` [PATCH 26/52] nfsd4: allow encoding across page boundaries J. Bruce Fields
2014-05-22 19:32 ` [PATCH 27/52] nfsd4: convert 4.1 replay encoding J. Bruce Fields
2014-05-22 19:32 ` [PATCH 28/52] nfsd4: don't try to encode conflicting owner if low on space J. Bruce Fields
2014-05-22 19:32 ` [PATCH 29/52] nfsd4: more precise nfsd4_max_reply J. Bruce Fields
2014-05-22 19:32 ` [PATCH 30/52] nfsd4: minor encode_read cleanup J. Bruce Fields
2014-05-22 19:32 ` [PATCH 31/52] nfsd4: nfsd4_check_resp_size should check against whole buffer J. Bruce Fields
2014-05-22 19:32 ` [PATCH 32/52] nfsd4: fix buflen calculation after read encoding J. Bruce Fields
2014-05-22 19:32 ` [PATCH 33/52] rpc: define xdr_restrict_buflen J. Bruce Fields
2014-05-22 19:32 ` [PATCH 34/52] nfsd4: adjust buflen to session channel limit J. Bruce Fields
2014-05-22 19:32 ` [PATCH 35/52] nfsd4: use session limits to release send buffer reservation J. Bruce Fields
2014-05-22 19:32 ` [PATCH 36/52] nfsd4: allow large readdirs J. Bruce Fields
2014-05-22 19:32 ` [PATCH 37/52] nfsd4: enforce rd_dircount J. Bruce Fields
2014-05-22 19:32 ` [PATCH 38/52] nfsd4: don't treat readlink like a zero-copy operation J. Bruce Fields
2014-05-22 19:32 ` [PATCH 39/52] nfsd4: better estimate of getattr response size J. Bruce Fields
2014-05-22 19:32 ` [PATCH 40/52] nfsd4: estimate sequence " J. Bruce Fields
2014-05-22 19:32 ` [PATCH 41/52] nfsd4: turn off zero-copy-read in exotic cases J. Bruce Fields
2014-05-28 8:09 ` Christoph Hellwig
2014-05-28 14:01 ` J. Bruce Fields
2014-05-28 14:13 ` Anna Schumaker
2014-05-28 14:23 ` J. Bruce Fields [this message]
2014-05-28 14:27 ` Anna Schumaker
2014-06-03 4:18 ` Weston Andros Adamson
2014-06-03 14:10 ` J. Bruce Fields
2014-06-03 14:24 ` Weston Andros Adamson
2014-06-03 14:35 ` J. Bruce Fields
2014-05-28 21:08 ` J. Bruce Fields
2014-06-02 22:12 ` J. Bruce Fields
2014-05-22 19:32 ` [PATCH 42/52] nfsd4: nfsd_vfs_read doesn't use file handle parameter J. Bruce Fields
2014-05-22 19:32 ` [PATCH 43/52] nfsd4: separate splice and readv cases J. Bruce Fields
2014-05-22 19:32 ` [PATCH 44/52] nfsd4: read encoding cleanup J. Bruce Fields
2014-05-22 19:32 ` [PATCH 45/52] nfsd4: more " J. Bruce Fields
2014-05-22 19:32 ` [PATCH 46/52] nfsd4: allow exotic read compounds J. Bruce Fields
2014-05-22 19:32 ` [PATCH 47/52] nfsd4: really fix nfs4err_resource in 4.1 case J. Bruce Fields
2014-05-22 19:32 ` [PATCH 48/52] nfsd4: kill WRITE32 J. Bruce Fields
2014-05-22 19:32 ` [PATCH 49/52] nfsd4: kill WRITE64 J. Bruce Fields
2014-05-22 19:32 ` [PATCH 50/52] nfsd4: kill WRITEMEM J. Bruce Fields
2014-05-22 19:32 ` [PATCH 51/52] nfsd4: kill write32, write64 J. Bruce Fields
2014-05-22 19:32 ` [PATCH 52/52] nfsd4: better reservation of head space for krb5 J. Bruce Fields
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