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9679df5736
There are some cases in which repositories accrue a large number of packfiles. The existing mwindow limit applies only to the total size of mmap'd files, not on their number. This leads to a situation in which having lots of small packfiles could exhaust the allowed number of open files, particularly on macOS, where the default ulimit is very low (256). This change adds a new configuration parameter (GIT_OPT_SET_MWINDOW_FILE_LIMIT) that sets the maximum number of open packfiles, with a default of 128. This is low enough so that even macOS users should not hit it during normal use. Based on PR #5386, originally written by @josharian. Fixes: #2758
37 lines
1015 B
C
37 lines
1015 B
C
#include "clar_libgit2.h"
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#include <git2.h>
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void test_pack_filelimit__open_repo_with_1025_packfiles(void)
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{
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git_repository *repo;
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git_revwalk *walk;
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git_oid id;
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int i;
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/*
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* This repository contains 1025 packfiles, each with one commit, one tree,
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* and two blobs. The first blob (README.md) has the same content in all
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* commits, but the second one (file.txt) has a different content in each
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* commit.
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*/
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cl_git_pass(git_repository_open(&repo, cl_fixture("1025.git")));
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cl_git_pass(git_revwalk_new(&walk, repo));
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cl_git_pass(git_revwalk_sorting(walk, GIT_SORT_TOPOLOGICAL));
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cl_git_pass(git_revwalk_push_ref(walk, "refs/heads/master"));
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/*
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* Walking the tree requires opening each of the 1025 packfiles. This should
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* work in all platforms, including those where the default limit of open
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* file descriptors is small (e.g. 256 in macOS).
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*/
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i = 0;
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while (git_revwalk_next(&id, walk) == 0)
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++i;
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cl_assert_equal_i(1025, i);
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git_revwalk_free(walk);
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git_repository_free(repo);
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}
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