Messages in this thread | | | Subject | Re: splice: move balance_dirty_pages_ratelimited() outside of splice actor | From | Peter Zijlstra <> | Date | Tue, 12 Jun 2007 14:16:12 +0200 |
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On Tue, 2007-06-12 at 14:10 +0200, Jens Axboe wrote: > On Tue, Jun 12 2007, Peter Zijlstra wrote: > > On Tue, 2007-06-12 at 13:31 +0200, Jens Axboe wrote: > > > > > Would you prefer this change, then? I'd prefer keeping the current code, > > > unless it's absolutely critical that we call > > > balance_dirty_pages_ratelimited() for each and every page instead of eg > > > every 16 pages here. > > > > For that we should call: > > balance_dirty_pages_ratelimited_nr(mapping, nr); > > > > Which is ok, for small nr. > > OK, then this should be better: > > diff --git a/fs/splice.c b/fs/splice.c > index 25ec9c8..ed40967 100644 > --- a/fs/splice.c > +++ b/fs/splice.c > @@ -844,6 +883,9 @@ generic_file_splice_write_nolock(struct pipe_inode_info *pipe, struct file *out, > sd.file = out; > ret = __splice_from_pipe(pipe, &sd, pipe_to_file); > if (ret > 0) { > + unsigned long nr_pages; > + > + nr_pages = (ret + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
perhaps? nr_pages = DIV_ROUND_UP(ret, PAGE_CACHE_SIZE);
not sure how horrid that turns out to be; you never know with gcc.
Otherwise, looks good.
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