From: Zhang Song <zhangsong02@qianxin.com>
Date: Tue, 19 Sep 2023 06:08:51 +0000 (+0800)
Subject: crimson/os/seastore: create page aligned bufferptr in copy ctor of CachedExtent
X-Git-Tag: v19.0.0~448^2
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=refs%2Fpull%2F53501%2Fhead;p=ceph.git

crimson/os/seastore: create page aligned bufferptr in copy ctor of CachedExtent

Signed-off-by: Zhang Song <zhangsong02@qianxin.com>
---

diff --git a/src/crimson/os/seastore/cached_extent.h b/src/crimson/os/seastore/cached_extent.h
index 497d7dcfcdc5..9615d0257e4b 100644
--- a/src/crimson/os/seastore/cached_extent.h
+++ b/src/crimson/os/seastore/cached_extent.h
@@ -707,9 +707,10 @@ protected:
       length(other.get_length()),
       version(other.version),
       poffset(other.poffset) {
+      assert((length % CEPH_PAGE_SIZE) == 0);
       if (other.is_fully_loaded()) {
-        ptr = std::make_optional<ceph::bufferptr>
-          (other.ptr->c_str(), other.ptr->length());
+        ptr.emplace(buffer::create_page_aligned(length));
+        other.ptr->copy_out(0, length, ptr->c_str());
       } else {
         // the extent must be fully loaded before CoW
         assert(length == 0); // in case of root