From: Andrew Morton <akpm@linux-foundation.org>
To: Matthew Wilcox <willy@infradead.org>
Cc: Ira Weiny <ira.weiny@intel.com>,
linux-mm@kvack.org, Atul Gupta <atul.gupta@chelsio.com>,
linux-crypto@vger.kernel.org
Subject: Re: [PATCH v2 1/3] mm: Introduce page_size()
Date: Fri, 20 Sep 2019 16:28:48 -0700 [thread overview]
Message-ID: <20190920162848.950dd70264e670a485f410dc@linux-foundation.org> (raw)
In-Reply-To: <20190723160248.GK363@bombadil.infradead.org>
On Tue, 23 Jul 2019 09:02:48 -0700 Matthew Wilcox <willy@infradead.org> wrote:
> On Mon, Jul 22, 2019 at 05:43:07PM -0700, Ira Weiny wrote:
> > > diff --git a/drivers/crypto/chelsio/chtls/chtls_io.c b/drivers/crypto/chelsio/chtls/chtls_io.c
> > > index 551bca6fef24..925be5942895 100644
> > > --- a/drivers/crypto/chelsio/chtls/chtls_io.c
> > > +++ b/drivers/crypto/chelsio/chtls/chtls_io.c
> > > @@ -1078,7 +1078,7 @@ int chtls_sendmsg(struct sock *sk, struct msghdr *msg, size_t size)
> > > bool merge;
> > >
> > > if (page)
> > > - pg_size <<= compound_order(page);
> > > + pg_size = page_size(page);
> > > if (off < pg_size &&
> > > skb_can_coalesce(skb, i, page, off)) {
> > > merge = 1;
> > > @@ -1105,8 +1105,7 @@ int chtls_sendmsg(struct sock *sk, struct msghdr *msg, size_t size)
> > > __GFP_NORETRY,
> > > order);
> > > if (page)
> > > - pg_size <<=
> > > - compound_order(page);
> > > + pg_size <<= order;
> >
> > Looking at the code I see pg_size should be PAGE_SIZE right before this so why
> > not just use the new call and remove the initial assignment?
>
> This driver is really convoluted. I wasn't certain I wouldn't break it
> in some horrid way. I made larger changes to it originally, then they
> touched this part of the driver and I had to rework the patch to apply
> on top of their changes. So I did something more minimal.
>
> This, on top of what's in Andrew's tree, would be my guess, but I don't
> have the hardware.
>
> diff --git a/drivers/crypto/chelsio/chtls/chtls_io.c b/drivers/crypto/chelsio/chtls/chtls_io.c
> index 925be5942895..d4eb0fcd04c7 100644
> --- a/drivers/crypto/chelsio/chtls/chtls_io.c
> +++ b/drivers/crypto/chelsio/chtls/chtls_io.c
> @@ -1073,7 +1073,7 @@ int chtls_sendmsg(struct sock *sk, struct msghdr *msg, size_t size)
> } else {
> int i = skb_shinfo(skb)->nr_frags;
> struct page *page = TCP_PAGE(sk);
> - int pg_size = PAGE_SIZE;
> + unsigned int pg_size = 0;
> int off = TCP_OFF(sk);
> bool merge;
>
> @@ -1092,7 +1092,7 @@ int chtls_sendmsg(struct sock *sk, struct msghdr *msg, size_t size)
> if (page && off == pg_size) {
> put_page(page);
> TCP_PAGE(sk) = page = NULL;
> - pg_size = PAGE_SIZE;
> + pg_size = 0;
> }
>
> if (!page) {
> @@ -1104,15 +1104,13 @@ int chtls_sendmsg(struct sock *sk, struct msghdr *msg, size_t size)
> __GFP_NOWARN |
> __GFP_NORETRY,
> order);
> - if (page)
> - pg_size <<= order;
> }
> if (!page) {
> page = alloc_page(gfp);
> - pg_size = PAGE_SIZE;
> }
> if (!page)
> goto wait_for_memory;
> + pg_size = page_size(page);
> off = 0;
> }
I didn't do anything with this. I assume the original patch (which has
been in -next since July 22) is good and the above is merely a cleanup?
next prev parent reply other threads:[~2019-09-20 23:28 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-21 10:46 [PATCH v2 0/3] Make working with compound pages easier Matthew Wilcox
2019-07-21 10:46 ` [PATCH v2 1/3] mm: Introduce page_size() Matthew Wilcox
2019-07-23 0:43 ` Ira Weiny
2019-07-23 16:02 ` Matthew Wilcox
2019-07-23 17:58 ` Ira Weiny
2019-07-23 18:14 ` Matthew Wilcox
2019-07-23 20:44 ` Ira Weiny
2019-07-23 21:03 ` Matthew Wilcox
2019-09-20 23:28 ` Andrew Morton [this message]
2019-09-21 1:09 ` Matthew Wilcox
2019-09-22 2:13 ` Weiny, Ira
2019-07-21 10:46 ` [PATCH v2 2/3] mm: Introduce page_shift() Matthew Wilcox
2019-07-23 0:44 ` Ira Weiny
2019-07-24 10:40 ` kbuild test robot
2019-07-25 0:30 ` Andrew Morton
2019-07-25 20:30 ` Ira Weiny
2019-09-23 20:30 ` Matthew Wilcox
2019-07-21 10:46 ` [PATCH v2 3/3] mm: Introduce compound_nr() Matthew Wilcox
2019-07-23 0:46 ` Ira Weiny
2019-07-23 12:55 ` [PATCH v2 0/3] Make working with compound pages easier Kirill A. Shutemov
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