GGLinnk/bees
1
0
Fork 0
mirror of https://github.com/Zygo/bees.git synced 2025-05-17 21:35:45 +02:00
Code Packages

context: process PREALLOC extents synchronously in extent's Task worker

Browse Source 
Inode-oriented scan workers must do all of their work sequentially,
so it's counterproductive to spawn a Task to do a background dedupe.

Signed-off-by: Zygo Blaxell <bees@furryterror.org>
This commit is contained in:
Zygo Blaxell 2021-11-16 01:00:30 -05:00
parent 84f91af503
commit d725f3c66c
1 changed files with 17 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
src/bees-context.cc
View File

@ -332,14 +332,11 @@ BeesContext::scan_one_extent(const BeesFileRange &bfr, const Extent &e)
if (e.flags() & Extent::PREALLOC) {
// Prealloc is all zero and we replace it with a hole.
// No special handling is required here. Nuke it and move on.
Task(
"dedup_prealloc",
[m_ctx, bfr, e]() {
BEESLOGINFO("prealloc extent " << e);
// Must not extend past EOF
auto extent_size = min(e.end(), bfr.file_size()) - e.begin();
// Must hold tmpfile until dedupe is done
auto tmpfile = m_ctx->tmpfile();
const auto tmpfile = m_ctx->tmpfile();
BeesFileRange prealloc_bfr(tmpfile->make_hole(extent_size));
// Apparently they can both extend past EOF
BeesFileRange copy_bfr(bfr.fd(), e.begin(), e.begin() + extent_size);
@ -348,14 +345,11 @@ BeesContext::scan_one_extent(const BeesFileRange &bfr, const Extent &e)
if (m_ctx->dedup(brp)) {
BEESCOUNT(dedup_prealloc_hit);
BEESCOUNTADD(dedup_prealloc_bytes, e.size());
// return bfr;
return bfr;
} else {
BEESCOUNT(dedup_prealloc_miss);
}
}
).run();
return bfr; // if dedupe success, which we now blindly assume
}
// OK we need to read extent now
bees_readahead(bfr.fd(), bfr.begin(), bfr.size());