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Re: [PATCH v2 17/17] rename_tmp_log(): on SCLD_VANISHED, retry

From
Michael Haggerty <mhagger@alum.mit.edu>
Date
Jan 7, 2014, 10:50 UTC
Message-ID
<52CBDBD9.7020607@alum.mit.edu>
In-Reply-To
<xmqqtxdhhsyq.fsf@gitster.dls.corp.google.com>
On 01/06/2014 07:21 PM, Junio C Hamano wrote:
Show 8 quoted lines
> Michael Haggerty <mhagger@alum.mit.edu> writes:
> 
>> If safe_create_leading_directories() fails because a file along the
>> path unexpectedly vanished, try again from the beginning.  Try at most
>> 3 times.
> 
> As the previous step bumped it from 3 to 4 without explanation, the
> above no longer reflects reality ;-)

Good catch. The increment 3 -> 4 was because the first call to rename() is optimistic, and can fail once even if there is no race. I will change the commit message of 16/17 to explain this point, and of 17/17 to match reality.

> The series mostly looked sane from a cursory read.
> 
> Will re-queue.  Thanks.
Michael
-- 
Michael Haggerty
mhagger@alum.mit.edu
http://softwareswirl.blogspot.com/
Previous: Junio C Hamano
Message 29 of 29 in “Fix some mkdir/rmdir races”
  1. 00/17 Fix some mkdir/rmdir racesMichael Haggerty, Jan 6, 2014
  2. 01/17 safe_create_leading_directories(): fix format of "if" chainingMichael Haggerty, Jan 6, 2014
  3. 02/17 safe_create_leading_directories(): reduce scope of local variableMichael Haggerty, Jan 6, 2014
  4. 03/17 safe_create_leading_directories(): add explicit "slash" pointerMichael Haggerty, Jan 6, 2014
  5. Junio C HamanoJan 6, 2014
  6. Michael HaggertyJan 7, 2014
  7. Junio C HamanoJan 7, 2014
  8. Sebastian SchuberthJan 19, 2014
  9. 04/17 safe_create_leading_directories(): rename local variableMichael Haggerty, Jan 6, 2014
  10. 05/17 safe_create_leading_directories(): split on first of multiple slashesMichael Haggerty, Jan 6, 2014
  11. 06/17 safe_create_leading_directories(): always restore slash at end of loopMichael Haggerty, Jan 6, 2014
  12. 07/17 safe_create_leading_directories(): introduce enum for return valuesMichael Haggerty, Jan 6, 2014
  13. 08/17 cmd_init_db(): when creating directories, handle errors conservativelyMichael Haggerty, Jan 6, 2014
  14. 09/17 safe_create_leading_directories(): add new error value SCLD_VANISHEDMichael Haggerty, Jan 6, 2014
  15. 10/17 lock_ref_sha1_basic(): on SCLD_VANISHED, retryMichael Haggerty, Jan 6, 2014
  16. Junio C HamanoJan 6, 2014
  17. Michael HaggertyJan 7, 2014
  18. 11/17 lock_ref_sha1_basic(): if locking fails with ENOENT, retryMichael Haggerty, Jan 6, 2014
  19. 12/17 remove_dir_recurse(): tighten condition for removing unreadable dirMichael Haggerty, Jan 6, 2014
  20. 13/17 remove_dir_recurse(): handle disappearing files and directoriesMichael Haggerty, Jan 6, 2014
  21. Junio C HamanoJan 6, 2014
  22. Michael HaggertyJan 7, 2014
  23. Junio C HamanoJan 7, 2014
  24. 14/17 rename_ref(): extract function rename_tmp_log()Michael Haggerty, Jan 6, 2014
  25. 15/17 rename_tmp_log(): handle a possible mkdir/rmdir raceMichael Haggerty, Jan 6, 2014
  26. 16/17 rename_tmp_log(): limit the number of remote_empty_directories() attemptsMichael Haggerty, Jan 6, 2014
  27. 17/17 rename_tmp_log(): on SCLD_VANISHED, retryMichael Haggerty, Jan 6, 2014
  28. Junio C HamanoJan 6, 2014
  29. Michael HaggertyJan 7, 2014

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