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Merge pull request #3668 from libgit2/cmn/mwindow-try-harder

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mwindow: free unused windows if we fail to mmap
This commit is contained in:
Edward Thomson 2016-03-09 14:51:13 +00:00
commit 084f2c4b41
1 changed files with 12 additions and 2 deletions
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14
src/mwindow.c
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@ -296,8 +296,18 @@ static git_mwindow *new_window(
*/
if (git_futils_mmap_ro(&w->window_map, fd, w->offset, (size_t)len) < 0) {
git__free(w);
return NULL;
/*
* The first error might be down to memory fragmentation even if
* we're below our soft limits, so free up what we can and try again.
*/
while (git_mwindow_close_lru(mwf) == 0)
/* nop */;
if (git_futils_mmap_ro(&w->window_map, fd, w->offset, (size_t)len) < 0) {
git__free(w);
return NULL;
}
}
ctl->mmap_calls++;