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Merge pull request #6245 from trofi/fix-nix-store-gc-limit-auto-optimise-store

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nix store gc: account for auto-optimised store
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Eelco Dolstra 2022-03-16 09:19:57 +01:00 committed by GitHub
parent 7b0eb9eaf2 6b1872312f
commit a53c1dc96d
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 25 additions and 3 deletions
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3
src/libstore/gc.cc
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@ -841,7 +841,8 @@ void LocalStore::collectGarbage(const GCOptions & options, GCResults & results)
if (unlink(path.c_str()) == -1) if (unlink(path.c_str()) == -1)
throw SysError("deleting '%1%'", path); throw SysError("deleting '%1%'", path);
results.bytesFreed += st.st_size; /* Do not accound for deleted file here. Rely on deletePath()
accounting. */
} }
struct stat st; struct stat st;

25
src/libutil/util.cc
View file

@ -406,8 +406,29 @@ static void _deletePath(int parentfd, const Path & path, uint64_t & bytesFreed)
throw SysError("getting status of '%1%'", path); throw SysError("getting status of '%1%'", path);
} }
if (!S_ISDIR(st.st_mode) && st.st_nlink == 1) if (!S_ISDIR(st.st_mode)) {
bytesFreed += st.st_size; /* We are about to delete a file. Will it likely free space? */
switch (st.st_nlink) {
/* Yes: last link. */
case 1:
bytesFreed += st.st_size;
break;
/* Maybe: yes, if 'auto-optimise-store' or manual optimisation
was performed. Instead of checking for real let's assume
it's an optimised file and space will be freed.
In worst case we will double count on freed space for files
with exactly two hardlinks for unoptimised packages.
*/
case 2:
bytesFreed += st.st_size;
break;
/* No: 3+ links. */
default:
break;
}
}
if (S_ISDIR(st.st_mode)) { if (S_ISDIR(st.st_mode)) {
/* Make the directory accessible. */ /* Make the directory accessible. */