From: Wei Liu <wei.liu2@citrix.com>
To: Juergen Gross <jgross@suse.com>
Cc: tim@xen.org, sstabellini@kernel.org, wei.liu2@citrix.com,
George.Dunlap@eu.citrix.com, andrew.cooper3@citrix.com,
ian.jackson@eu.citrix.com, xen-devel@lists.xen.org,
jbeulich@suse.com
Subject: Re: [PATCH v3 11/12] xenstore: add small default data buffer to internal struct
Date: Sat, 12 Nov 2016 15:11:45 +0000 [thread overview]
Message-ID: <20161112151145.GM23528@citrix.com> (raw)
In-Reply-To: <1478851210-6251-12-git-send-email-jgross@suse.com>
On Fri, Nov 11, 2016 at 09:00:09AM +0100, Juergen Gross wrote:
> Instead of always allocating a data buffer for incoming or outgoing
> xenstore wire data add a small buffer to the buffered_data structure
> of xenstored. This has the advantage that especially sending simple
> response messages like errors or "OK" will no longer need allocating
> a data buffer. This requires adding a memory context where the
> allocated buffer was used for that purpose.
>
> In order to avoid allocating a new buffered_data structure for each
> response reuse the structure of the original request. This in turn
> will avoid any new memory allocations for sending e.g. an ENOMEM
> response making it possible to send it at all. To do this the
> allocation of the buffered_data structure for the incoming request
> must be done when a new request is recognized instead of doing it
> when accepting a new connect.
>
> Signed-off-by: Juergen Gross <jgross@suse.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
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next prev parent reply other threads:[~2016-11-12 15:11 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-11 7:59 [PATCH v3 00/12] xenstore: support reading directory with many children Juergen Gross
2016-11-11 7:59 ` [PATCH v3 01/12] xenstore: modify add_change_node() parameter types Juergen Gross
2016-11-12 15:09 ` Wei Liu
2016-11-11 8:00 ` [PATCH v3 02/12] xenstore: call add_change_node() directly when writing node Juergen Gross
2016-11-12 15:10 ` Wei Liu
2016-11-13 10:50 ` Juergen Gross
2016-11-14 8:46 ` Wei Liu
2016-11-11 8:00 ` [PATCH v3 03/12] xenstore: use common tdb record header in xenstore Juergen Gross
2016-11-12 15:10 ` Wei Liu
2016-11-11 8:00 ` [PATCH v3 04/12] xenstore: add per-node generation counter Juergen Gross
2016-11-12 15:10 ` Wei Liu
2016-11-11 8:00 ` [PATCH v3 05/12] xenstore: add support for reading directory with many children Juergen Gross
2016-11-11 10:09 ` Jan Beulich
[not found] ` <5825A6D6020000780011DEA4@suse.com>
2016-11-11 10:43 ` Juergen Gross
2016-11-11 11:12 ` Jan Beulich
[not found] ` <5825B59B020000780011DF28@suse.com>
2016-11-11 11:15 ` Juergen Gross
2016-11-12 15:11 ` Wei Liu
2016-11-11 8:00 ` [PATCH v3 06/12] xenstore: support XS_DIRECTORY_PART in libxenstore Juergen Gross
2016-11-12 15:11 ` Wei Liu
2016-11-11 8:00 ` [PATCH v3 07/12] xenstore: use array for xenstore wire command handling Juergen Gross
2016-11-12 15:11 ` Wei Liu
2016-11-11 8:00 ` [PATCH v3 08/12] xenstore: let command functions return error or success Juergen Gross
2016-11-12 15:11 ` Wei Liu
2016-11-13 11:05 ` Juergen Gross
2016-11-11 8:00 ` [PATCH v3 09/12] xenstore: make functions static Juergen Gross
2016-11-11 13:02 ` Andrew Cooper
2016-11-11 13:19 ` Juergen Gross
2016-11-11 8:00 ` [PATCH v3 10/12] xenstore: add helper functions for wire argument parsing Juergen Gross
2016-11-12 15:11 ` Wei Liu
2016-11-11 8:00 ` [PATCH v3 11/12] xenstore: add small default data buffer to internal struct Juergen Gross
2016-11-12 15:11 ` Wei Liu [this message]
2016-11-11 8:00 ` [PATCH v3 12/12] xenstore: handle memory allocation failures in xenstored Juergen Gross
2016-11-11 11:07 ` Juergen Gross
2016-11-12 15:11 ` Wei Liu
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