From: Jaegeuk Kim <jaegeuk@kernel.org>
To: Goldwyn Rodrigues <rgoldwyn@suse.de>
Cc: linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org,
linux-btrfs@vger.kernel.org, hch@infradead.org,
andres@anarazel.de, david@fromorbit.com, riteshh@linux.ibm.com,
linux-f2fs-devel@lists.sourceforge.net,
Goldwyn Rodrigues <rgoldwyn@suse.com>
Subject: Re: [PATCH 3/3] f2fs: fix inode rwsem regression
Date: Fri, 13 Sep 2019 12:46:41 -0700 [thread overview]
Message-ID: <20190913194641.GA72768@jaegeuk-macbookpro.roam.corp.google.com> (raw)
In-Reply-To: <20190911164517.16130-4-rgoldwyn@suse.de>
https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs.git/commit/?h=dev&id=ebef4d7eda0d06a6ab6dc0f9e9f848276e605962
Merged. Thanks,
On 09/11, Goldwyn Rodrigues wrote:
> From: Goldwyn Rodrigues <rgoldwyn@suse.com>
>
> This is similar to 942491c9e6d6 ("xfs: fix AIM7 regression")
> Apparently our current rwsem code doesn't like doing the trylock, then
> lock for real scheme. So change our read/write methods to just do the
> trylock for the RWF_NOWAIT case.
>
> We don't need a check for IOCB_NOWAIT and !direct-IO because it
> is checked in generic_write_checks().
>
> Fixes: b91050a80cec ("f2fs: add nowait aio support")
> Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
> ---
> fs/f2fs/file.c | 10 +++-------
> 1 file changed, 3 insertions(+), 7 deletions(-)
>
> diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
> index 3e58a6f697dd..c6f3ef815c05 100644
> --- a/fs/f2fs/file.c
> +++ b/fs/f2fs/file.c
> @@ -3134,16 +3134,12 @@ static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
> goto out;
> }
>
> - if ((iocb->ki_flags & IOCB_NOWAIT) && !(iocb->ki_flags & IOCB_DIRECT)) {
> - ret = -EINVAL;
> - goto out;
> - }
> -
> - if (!inode_trylock(inode)) {
> - if (iocb->ki_flags & IOCB_NOWAIT) {
> + if (iocb->ki_flags & IOCB_NOWAIT) {
> + if (!inode_trylock(inode)) {
> ret = -EAGAIN;
> goto out;
> }
> + } else {
> inode_lock(inode);
> }
>
> --
> 2.16.4
next prev parent reply other threads:[~2019-09-13 19:46 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20190910223327.mnegfoggopwqqy33@alap3.anarazel.de>
[not found] ` <20190911040420.GB27547@dread.disaster.area>
2019-09-11 9:39 ` Odd locking pattern introduced as part of "nowait aio support" Andres Freund
2019-09-11 10:19 ` Christoph Hellwig
2019-09-11 10:31 ` Ritesh Harjani
2019-09-11 10:55 ` Goldwyn Rodrigues
2019-09-11 16:45 ` Fix inode sem regression for nowait Goldwyn Rodrigues
2019-09-11 16:45 ` [PATCH 1/3] btrfs: fix inode rwsem regression Goldwyn Rodrigues
2019-09-11 17:21 ` David Sterba
2019-09-11 16:45 ` [PATCH 2/3] ext4: " Goldwyn Rodrigues
2019-09-12 8:52 ` Ritesh Harjani
2019-09-12 9:26 ` Matthew Bobrowski
2019-09-23 10:10 ` Jan Kara
2019-09-23 13:18 ` Theodore Y. Ts'o
2019-09-11 16:45 ` [PATCH 3/3] f2fs: " Goldwyn Rodrigues
2019-09-12 6:17 ` Chao Yu
2019-09-13 19:46 ` Jaegeuk Kim [this message]
2019-09-16 1:16 ` Chao Yu
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