From 78a28df9388cccb1ec85aa5642808f0d3392155f Mon Sep 17 00:00:00 2001 From: Alexandre Julliard Date: Wed, 14 Feb 2007 18:11:40 +0100 Subject: [PATCH] sha1_file.c: Round the mmap offset to half the window size. This ensures that a given area is mapped at most twice, and greatly reduces the virtual address space usage. Signed-off-by: Alexandre Julliard Acked-by: Shawn O. Pearce Signed-off-by: Junio C Hamano --- sha1_file.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/sha1_file.c b/sha1_file.c index 8ad7fad825..b83f59f383 100644 --- a/sha1_file.c +++ b/sha1_file.c @@ -407,7 +407,6 @@ static unsigned int peak_pack_open_windows; static unsigned int pack_open_windows; static size_t peak_pack_mapped; static size_t pack_mapped; -static size_t page_size; struct packed_git *packed_git; void pack_report() @@ -416,7 +415,7 @@ void pack_report() "pack_report: getpagesize() = %10" SZ_FMT "\n" "pack_report: core.packedGitWindowSize = %10" SZ_FMT "\n" "pack_report: core.packedGitLimit = %10" SZ_FMT "\n", - page_size, + (size_t) getpagesize(), packed_git_window_size, packed_git_limit); fprintf(stderr, @@ -662,10 +661,9 @@ unsigned char* use_pack(struct packed_git *p, break; } if (!win) { - if (!page_size) - page_size = getpagesize(); + size_t window_align = packed_git_window_size / 2; win = xcalloc(1, sizeof(*win)); - win->offset = (offset / page_size) * page_size; + win->offset = (offset / window_align) * window_align; win->len = p->pack_size - win->offset; if (win->len > packed_git_window_size) win->len = packed_git_window_size; -- 2.11.4.GIT