Mercurial > hg
view tests/test-mq-subrepo-svn.t @ 49568:da48f170d203
rust-status: query fs traversal metadata lazily
Currently, any time the status algorithm needs to read a directory from the
filesystem (because the stat-only optimization is not available), it also
stats each directory entry eagerly.
Stat'ing the entries is only needed in a few cases (like when checking
the mtime of a directory for caching): this patch creates a wrapper struct
`DirEntry` that only stats the directory entry it represents when needed.
Excerpt of an `strace` before this change on Mozilla Central:
```
openat(AT_FDCWD, ".", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=3540, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x55dc970bd440 /* 139 entries */, 32768) = 5072
statx(3, ".hg", AT_STATX_SYNC_AS_STAT|AT_SYMLINK_NOFOLLOW, STATX_ALL, {stx_mask=STATX_ALL|STATX_MNT_ID, stx_attributes=0, stx_mode=S_IFDIR|0755, stx_size=772, ...}) = 0
[... 135 other successful `statx` calls]
getdents64(3, 0x55dc970bd440 /* 0 entries */, 32768) = 0
close(3) = 0
```
After this change:
```
openat(AT_FDCWD, ".", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=3540, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0x561567c10190 /* 139 entries */, 32768) = 5072
getdents64(3, 0x561567c10190 /* 0 entries */, 32768) = 0
close(3) = 0
```
author | Raphaël Gomès <rgomes@octobus.net> |
---|---|
date | Wed, 19 Oct 2022 12:38:06 +0200 |
parents | 075a553028e2 |
children |
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#require svn13 $ cat <<EOF >> $HGRCPATH > [extensions] > mq = > [diff] > nodates = 1 > [subrepos] > allowed = true > svn:allowed = true > EOF fn to create new repository, and cd into it $ mkrepo() { > hg init $1 > cd $1 > hg qinit > } handle svn subrepos safely $ svnadmin create svn-repo-2499 $ SVNREPOPATH=`pwd`/svn-repo-2499/project $ SVNREPOURL="`"$PYTHON" $TESTDIR/svnurlof.py \"$SVNREPOPATH\"`" $ mkdir -p svn-project-2499/trunk $ svn import -qm 'init project' svn-project-2499 "$SVNREPOURL" qnew on repo w/svn subrepo $ mkrepo repo-2499-svn-subrepo $ svn co "$SVNREPOURL"/trunk sub Checked out revision 1. $ echo 'sub = [svn]sub' >> .hgsub $ hg add .hgsub $ hg status -S -X '**/format' A .hgsub $ hg qnew -m0 0.diff $ cd sub $ echo foo > a $ svn add a A a $ svn st A* a (glob) $ cd .. $ hg status -S # doesn't show status for svn subrepos (yet) $ hg qnew -m1 1.diff abort: uncommitted changes in subrepository "sub" [255] $ cd ..