Messages in this thread | | | Date | Fri, 1 May 2009 09:09:11 +0200 | From | Ingo Molnar <> | Subject | Re: [PATCH 2/6] kill-the-BKL/reiserfs: release the write lock before rescheduling on do_journal_end() |
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* Frederic Weisbecker <fweisbec@gmail.com> wrote:
> When do_journal_end() copies data to the journal blocks buffers in memory, > it reschedules if needed between each block copied and dirtyfied. > > We can also release the write lock at this rescheduling stage, > like did the bkl implicitly. > > [ Impact: release the reiserfs write lock when it is not needed ] > > Cc: Jeff Mahoney <jeffm@suse.com> > Cc: Chris Mason <chris.mason@oracle.com> > Cc: Alexander Beregalov <a.beregalov@gmail.com> > Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> > --- > fs/reiserfs/journal.c | 2 ++ > 1 files changed, 2 insertions(+), 0 deletions(-) > > diff --git a/fs/reiserfs/journal.c b/fs/reiserfs/journal.c > index 7976d7d..373d080 100644 > --- a/fs/reiserfs/journal.c > +++ b/fs/reiserfs/journal.c > @@ -4232,7 +4232,9 @@ static int do_journal_end(struct reiserfs_transaction_handle *th, > next = cn->next; > free_cnode(sb, cn); > cn = next; > + reiserfs_write_unlock(sb); > cond_resched(); > + reiserfs_write_lock(sb);
There's 8 cond_resched()'s in the code - i'd suggest to introduce a helper for this - reiserfs_write_cond_resched(sb) or so?
Ingo
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