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core.fsync: use batch mode and sync loose objects by default on Windows 

Git for Windows has defaulted to core.fsyncObjectFiles=true since
September 2017. We turn on syncing of loose object files with batch mode
in upstream Git so that we can get broad coverage of the new code
upstream.

We don't actually do fsyncs in the most of the test suite, since
GIT_TEST_FSYNC is set to 0. However, we do exercise all of the
surrounding batch mode code since GIT_TEST_FSYNC merely makes the
maybe_fsync wrapper always appear to succeed.

Signed-off-by: Neeraj Singh <neerajsi@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Neeraj Singh 2022-04-04 22:20:14 -07:00 committed by Junio C Hamano
parent 425d290ce5
commit 8a94d83349
4 changed files with 10 additions and 1 deletions
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4
cache.h
View File

@ -1028,6 +1028,10 @@ enum fsync_component {
FSYNC_COMPONENT_COMMIT_GRAPH | \
FSYNC_COMPONENT_INDEX)
#ifndef FSYNC_COMPONENTS_PLATFORM_DEFAULT
#define FSYNC_COMPONENTS_PLATFORM_DEFAULT FSYNC_COMPONENTS_DEFAULT
#endif
/*
* A bitmask indicating which components of the repo should be fsynced.
*/

3
compat/mingw.h
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@ -332,6 +332,9 @@ int mingw_getpagesize(void);
int win32_fsync_no_flush(int fd);
#define fsync_no_flush win32_fsync_no_flush
#define FSYNC_COMPONENTS_PLATFORM_DEFAULT (FSYNC_COMPONENTS_DEFAULT | FSYNC_COMPONENT_LOOSE_OBJECT)
#define FSYNC_METHOD_DEFAULT (FSYNC_METHOD_BATCH)
struct rlimit {
unsigned int rlim_cur;
};

2
config.c
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@ -1341,7 +1341,7 @@ static const struct fsync_component_name {
static enum fsync_component parse_fsync_components(const char *var, const char *string)
{
enum fsync_component current = FSYNC_COMPONENTS_DEFAULT;
enum fsync_component current = FSYNC_COMPONENTS_PLATFORM_DEFAULT;
enum fsync_component positive = 0, negative = 0;
while (string) {

2
git-compat-util.h
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@ -1257,11 +1257,13 @@ __attribute__((format (printf, 3, 4))) NORETURN
void BUG_fl(const char *file, int line, const char *fmt, ...);
#define BUG(...) BUG_fl(__FILE__, __LINE__, __VA_ARGS__)
#ifndef FSYNC_METHOD_DEFAULT
#ifdef __APPLE__
#define FSYNC_METHOD_DEFAULT FSYNC_METHOD_WRITEOUT_ONLY
#else
#define FSYNC_METHOD_DEFAULT FSYNC_METHOD_FSYNC
#endif
#endif
enum fsync_action {
FSYNC_WRITEOUT_ONLY,