linux-kernel - Re: [PATCH v2 06/11] don't put symlink bodies in pagecache into highmem

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Message-ID: <20160114233353.GC17997@ZenIV.linux.org.uk>
Date:	Thu, 14 Jan 2016 23:33:53 +0000
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Tomeu Vizoso <tomeu@...euvizoso.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Neil Brown <neilb@...e.com>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>
Subject: Re: [PATCH v2 06/11] don't put symlink bodies in pagecache into
 highmem

On Thu, Jan 14, 2016 at 10:25:44PM +0000, Al Viro wrote:

> Anyway, mm/shmem.c bit follows.  With that + NFS one we ought to be OK
> wrt that class of bogosities.  I'll write the bits for
> Documentation/filesystems/porting (basically, "if you preseed the pagecache
> at ->symlink() time, don't put highmem pages there; page_symlink() will
> take care of that, provided that inode_nohighmem() is called first") and
> push the combined patch to #for-linus.

Done and pushed.  Please, pull from
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git

Shortlog:
Al Viro (1):
      Make sure that highmem pages are not added to symlink page cache

Diffstat:
 Documentation/filesystems/porting | 6 +++++-
 fs/nfs/dir.c                      | 5 ++---
 mm/shmem.c                        | 2 +-
 3 files changed, 8 insertions(+), 5 deletions(-)