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authorNguyễn Thái Ngọc Duy <pclouds@gmail.com>2014-03-25 20:41:41 +0700
committerJunio C Hamano <gitster@pobox.com>2014-04-16 09:29:41 -0700
commit39539495acb24abfb4dee551e3e9f2e696be7abf (patch)
treefbf97b4f412312b0788e290fc4008e616bdc28eb /config.mak.uname
parent5f95c9f850b19b368c43ae399cc831b17a26a5ac (diff)
downloadgit-39539495acb24abfb4dee551e3e9f2e696be7abf.tar.gz
index-pack: work around thread-unsafe pread()nd/index-pack-one-fd-per-thread
Multi-threaing of index-pack was disabled with c0f8654 (index-pack: Disable threading on cygwin - 2012-06-26), because pread() implementations for Cygwin and MSYS were not thread safe. Recent Cygwin does offer usable pread() and we enabled multi-threading with 103d530f (Cygwin 1.7 has thread-safe pread, 2013-07-19). Work around this problem on platforms with a thread-unsafe pread() emulation by opening one file handle per thread; it would prevent parallel pread() on different file handles from stepping on each other. Also remove NO_THREAD_SAFE_PREAD that was introduced in c0f8654 because it's no longer used anywhere. This workaround is unconditional, even for platforms with thread-safe pread() because the overhead is small (a couple file handles more) and not worth fragmenting the code. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Tested-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'config.mak.uname')
-rw-r--r--config.mak.uname1
1 files changed, 0 insertions, 1 deletions
diff --git a/config.mak.uname b/config.mak.uname
index 7d31fad241..db5c249b4c 100644
--- a/config.mak.uname
+++ b/config.mak.uname
@@ -158,7 +158,6 @@ ifeq ($(uname_O),Cygwin)
NO_SYMLINK_HEAD = YesPlease
NO_IPV6 = YesPlease
OLD_ICONV = UnfortunatelyYes
- NO_THREAD_SAFE_PREAD = YesPlease
# There are conflicting reports about this.
# On some boxes NO_MMAP is needed, and not so elsewhere.
# Try commenting this out if you suspect MMAP is more efficient