On 22/01/15 02:32, Stefan Beller wrote:
> By closing the file descriptors after creating the lock file we are not
> limiting the size of the transaction by the number of available file
> descriptors.
>
> Signed-off-by: Stefan Beller <[email protected]>
> ---
> refs.c | 17 +++++++++++++----
> t/t1400-update-ref.sh | 4 ++--
> 2 files changed, 15 insertions(+), 6 deletions(-)
>
> diff --git a/refs.c b/refs.c
> index 2013d37..9d01102 100644
> --- a/refs.c
> +++ b/refs.c
> @@ -3055,11 +3055,18 @@ int is_branch(const char *refname)
> static int write_sha1_to_lock_file(struct ref_lock *lock,
> const unsigned char *sha1)
> {
> - if (fdopen_lock_file(lock->lk, "w") < 0
> - || fprintf(lock->lk->fp, "%s\n", sha1_to_hex(sha1)) != 41)
> + if (lock->lk->fd == -1) {
> + if (reopen_lock_file(lock->lk) < 0
> + || fdopen_lock_file(lock->lk, "w") < 0
fdopen_lock_file() returns a 'FILE *', so this causes sparse to bark:
refs.c:3105:56: error: incompatible types for operation (<)
refs.c:3105:56: left side has type struct _IO_FILE [usertype] *
refs.c:3105:56: right side has type int
> + || fprintf(lock->lk->fp, "%s\n", sha1_to_hex(sha1)) != 41
> + || close_lock_file(lock->lk) < 0)
> + return -1;
> + } else {
> + if (fdopen_lock_file(lock->lk, "w") < 0
Similarly, sparse barks:
refs.c:3110:53: error: incompatible types for operation (<)
refs.c:3110:53: left side has type struct _IO_FILE [usertype] *
refs.c:3110:53: right side has type int
> + || fprintf(lock->lk->fp, "%s\n", sha1_to_hex(sha1)) != 41)
> return -1;
> - else
> - return 0;
> + }
> + return 0;
> }
>
> /*
> @@ -3761,6 +3768,8 @@ int ref_transaction_commit(struct ref_transaction
> *transaction,
> update->refname);
> goto cleanup;
> }
> + /* Do not keep all lock files open at the same time. */
> + close_lock_file(update->lock->lk);
> }
>
> /* Perform updates first so live commits remain referenced */
> diff --git a/t/t1400-update-ref.sh b/t/t1400-update-ref.sh
> index 47d2fe9..c593a1d 100755
> --- a/t/t1400-update-ref.sh
> +++ b/t/t1400-update-ref.sh
> @@ -979,7 +979,7 @@ run_with_limited_open_files () {
>
> test_lazy_prereq ULIMIT_FILE_DESCRIPTORS 'run_with_limited_open_files true'
>
> -test_expect_failure ULIMIT_FILE_DESCRIPTORS 'large transaction creating
> branches does not burst open file limit' '
> +test_expect_success ULIMIT_FILE_DESCRIPTORS 'large transaction creating
> branches does not burst open file limit' '
> (
> for i in $(test_seq 33)
> do
> @@ -990,7 +990,7 @@ test_expect_failure ULIMIT_FILE_DESCRIPTORS 'large
> transaction creating branches
> )
> '
>
> -test_expect_failure ULIMIT_FILE_DESCRIPTORS 'large transaction deleting
> branches does not burst open file limit' '
> +test_expect_success ULIMIT_FILE_DESCRIPTORS 'large transaction deleting
> branches does not burst open file limit' '
> (
> for i in $(test_seq 33)
> do
>
ATB,
Ramsay Jones
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