9f673f9 (gc: config option for running --auto in background -
2014-02-08) puts "gc --auto" in background to reduce user's wait
time. Part of the garbage collecting is pack-refs and pruning
reflogs. These require locking some refs and may abort other processes
trying to lock the same ref. If gc --auto is fired in the middle of a
script, gc's holding locks in the background could fail the script,
which could never happen before 9f673f9.
Keep running pack-refs and "reflog --prune" in foreground to stop
parallel ref updates. The remaining background operations (repack,
prune and rerere) should impact running git processes.
Reported-by: Adam Borowski <kilob...@angband.pl>
Signed-off-by: Nguyễn Thái Ngọc Duy <pclo...@gmail.com>
---
builtin/gc.c | 26 ++++++++++++++++++++------
1 file changed, 20 insertions(+), 6 deletions(-)
diff --git a/builtin/gc.c b/builtin/gc.c
index 85f5c2b..8d219d8 100644
--- a/builtin/gc.c
+++ b/builtin/gc.c
@@ -26,6 +26,7 @@ static const char * const builtin_gc_usage[] = {
};
static int pack_refs = 1;
+static int prune_reflogs = 1;
static int aggressive_depth = 250;
static int aggressive_window = 250;
static int gc_auto_threshold = 6700;
@@ -258,6 +259,19 @@ static const char *lock_repo_for_gc(int force, pid_t*
ret_pid)
return NULL;
}
+static int gc_before_repack(void)
+{
+ if (pack_refs && run_command_v_opt(pack_refs_cmd.argv, RUN_GIT_CMD))
+ return error(FAILED_RUN, pack_refs_cmd.argv[0]);
+
+ if (prune_reflogs && run_command_v_opt(reflog.argv, RUN_GIT_CMD))
+ return error(FAILED_RUN, reflog.argv[0]);
+
+ pack_refs = 0;
+ prune_reflogs = 0;
+ return 0;
+}
+
int cmd_gc(int argc, const char **argv, const char *prefix)
{
int aggressive = 0;
@@ -320,12 +334,15 @@ int cmd_gc(int argc, const char **argv, const char
*prefix)
fprintf(stderr, _("Auto packing the repository
for optimum performance.\n"));
fprintf(stderr, _("See \"git help gc\" for manual
housekeeping.\n"));
}
- if (detach_auto)
+ if (detach_auto) {
+ if (gc_before_repack())
+ return -1;
/*
* failure to daemonize is ok, we'll continue
* in foreground
*/
daemonize();
+ }
} else
add_repack_all_option();
@@ -337,11 +354,8 @@ int cmd_gc(int argc, const char **argv, const char *prefix)
name, (uintmax_t)pid);
}
- if (pack_refs && run_command_v_opt(pack_refs_cmd.argv, RUN_GIT_CMD))
- return error(FAILED_RUN, pack_refs_cmd.argv[0]);
-
- if (run_command_v_opt(reflog.argv, RUN_GIT_CMD))
- return error(FAILED_RUN, reflog.argv[0]);
+ if (gc_before_repack())
+ return -1;
if (run_command_v_opt(repack.argv, RUN_GIT_CMD))
return error(FAILED_RUN, repack.argv[0]);
--
1.9.1.346.ga2b5940
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