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Jbd2: fix a bug of leaking jh->b_jcount

PATCH Yongqiang Yang 3 participants 4 messages May 25, 2011 – May 26, 2011 1 message not in the archive

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#1 lore raw
Signed-off-by line was missed.
Quoted 29 lines · On Wed, May 25, 2011 at 6:19 PM, <[email protected]> wrote:

From: Ding Dinghua <[email protected]>

drop jh->b_jcount in error path
---
 fs/jbd2/transaction.c |    2 +-

 1 files changed, 1 insertions(+), 1 deletions(-)
fs/jbd2/transaction.c +0 -1
index 05fa77a..d66672a 100644
@@ -921,8 +921,8 @@ int jbd2_journal_get_create_access(handle_t *handle, struct buffer_head *bh)
         */
        JBUFFER_TRACE(jh, "cancelling revoke");
        jbd2_journal_cancel_revoke(handle, jh);
-       jbd2_journal_put_journal_head(jh);

 out:
+       jbd2_journal_put_journal_head(jh);
       return err;
 }

--
1.7.4.1

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Best Wishes
Yongqiang Yang
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#2 lore raw
Quoted 1 line · Yongqiang Yang
Signed-off-by line was missed.

Also, one request --- if the leak is one that happens on the error path, please say so in the commit summary. That changes the priority of the patch compared to something which is much higher priority if it is always leaking on the common case code path.

Thanks!!

-- Ted

#3 lore raw
In reply to Yongqiang Yang
Quoted 1 line · Yongqiang Yang
Signed-off-by line was missed.

Ding,

Please resend the patch with the Signed-off-by, or tell me explicitly that it's OK to add:

The signed-off-by has legal meaning (see below) so it's not something I want to add on my own initiative without getting an explicit ack from the original author.

Regards,

- Ted

(From /usr/src/linux/Documentation/SubmittingPatches)

12) Sign your work

To improve tracking of who did what, especially with patches that can percolate to their final resting place in the kernel through several layers of maintainers, we've introduced a "sign-off" procedure on patches that are being emailed around.

The sign-off is a simple line at the end of the explanation for the patch, which certifies that you wrote it or otherwise have the right to pass it on as a open-source patch. The rules are pretty simple: if you can certify the below:

Developer's Certificate of Origin 1.1

By making a contribution to this project, I certify that:

(a) The contribution was created in whole or in part by me and I have the right to submit it under the open source license indicated in the file; or

(b) The contribution is based upon previous work that, to the best of my knowledge, is covered under an appropriate open source license and I have the right under that license to submit that work with modifications, whether created in whole or in part by me, under the same open source license (unless I am permitted to submit under a different license), as indicated in the file; or

(c) The contribution was provided directly to me by some other person who certified (a), (b) or (c) and I have not modified it.

(d) I understand and agree that this project and the contribution are public and that a record of the contribution (including all personal information I submit with it, including my sign-off) is maintained indefinitely and may be redistributed consistent with this project or the open source license(s) involved.

then you just add a line saying

using your real name (sorry, no pseudonyms or anonymous contributions.)

Some people also put extra tags at the end. They'll just be ignored for now, but you can do this to mark internal company procedures or just point out some special detail about the sign-off.

#4 lore raw

Hi Ted,
thanks for your suggestion, i have resent the patches, please have a look.

Quoted 71 lines · Ted Ts'o
Quoted 2 lines · Yongqiang Yang
Signed-off-by line was missed.

Ding,

Please resend the patch with the Signed-off-by, or tell me explicitly that it's OK to add:

The signed-off-by has legal meaning (see below) so it's not something I want to add on my own initiative without getting an explicit ack from the original author.

Regards,

- Ted

(From /usr/src/linux/Documentation/SubmittingPatches)

12) Sign your work

To improve tracking of who did what, especially with patches that can percolate to their final resting place in the kernel through several layers of maintainers, we've introduced a "sign-off" procedure on patches that are being emailed around.

The sign-off is a simple line at the end of the explanation for the patch, which certifies that you wrote it or otherwise have the right to pass it on as a open-source patch. The rules are pretty simple: if you can certify the below:

Developer's Certificate of Origin 1.1

By making a contribution to this project, I certify that:

(a) The contribution was created in whole or in part by me and I have the right to submit it under the open source license indicated in the file; or

(b) The contribution is based upon previous work that, to the best of my knowledge, is covered under an appropriate open source license and I have the right under that license to submit that work with modifications, whether created in whole or in part by me, under the same open source license (unless I am permitted to submit under a different license), as indicated in the file; or

(c) The contribution was provided directly to me by some other person who certified (a), (b) or (c) and I have not modified it.

(d) I understand and agree that this project and the contribution are public and that a record of the contribution (including all personal information I submit with it, including my sign-off) is maintained indefinitely and may be redistributed consistent with this project or the open source license(s) involved.

then you just add a line saying

using your real name (sorry, no pseudonyms or anonymous contributions.)

Some people also put extra tags at the end. They'll just be ignored for now, but you can do this to mark internal company procedures or just point out some special detail about the sign-off.