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filejournal: fix buffer realignment condition; useful debug output on error

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We don't care about contiguous, only about page alignment.
This commit is contained in:
Sage Weil 2010-06-30 08:34:26 -07:00
parent 134a0d0f72
commit 2f9ea76fba
1 changed files with 6 additions and 2 deletions
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8
src/os/FileJournal.cc
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@ -498,9 +498,13 @@ int FileJournal::prepare_single_write(bufferlist& bl, off64_t& queue_pos, uint64
void FileJournal::write_bl(off64_t& pos, bufferlist& bl)
{
// make sure this is a single, contiguous buffer
if (directio && !bl.is_contiguous()) {
// make sure list segments are page aligned
if (directio && (!bl.is_page_aligned() ||
!bl.is_n_page_sized())) {
bl.rebuild_page_aligned();
if ((bl.length() & ~PAGE_MASK) != 0 ||
(pos & ~PAGE_MASK) != 0)
dout(0) << "rebuild_page_aligned failed, " << bl << dendl;
assert((bl.length() & ~PAGE_MASK) == 0);
assert((pos & ~PAGE_MASK) == 0);
}