From: Maxim Patlasov <mpatlasov@parallels.com>
To: miklos@szeredi.hu
Cc: dev@parallels.com, xemul@parallels.com,
fuse-devel@lists.sourceforge.net, bfoster@redhat.com,
linux-kernel@vger.kernel.org, devel@openvz.org,
anand.avati@gmail.com
Subject: [PATCH] fuse: enable close_wait feature (v2)
Date: Tue, 15 Jan 2013 19:07:01 +0400 [thread overview]
Message-ID: <20130115150355.18759.92630.stgit@maximpc.sw.ru> (raw)
In-Reply-To: <20121220123204.4101.14064.stgit@maximpc.sw.ru>
The patch enables feature by passing 'true' to fuse_file_put in
fuse_release_common.
Previously, this was safe only in special cases when we sure that
multi-threaded userspace won't deadlock if we'll synchronously send
FUSE_RELEASE in the context of read-ahead or write-back callback. Now, it's
always safe because callbacks don't send requests to userspace anymore.
Changed in v2: update the patch to be applied cleanly on the top of
previous modified (v2) patch of the patch-set.
Signed-off-by: Maxim Patlasov <mpatlasov@parallels.com>
---
fs/fuse/file.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 150033a..83c8904 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -279,7 +279,8 @@ void fuse_release_common(struct file *file, int opcode)
* synchronous RELEASE is allowed (and desirable) in this case
* because the server can be trusted not to screw up.
*/
- fuse_file_put(ff, ff->fc->destroy_req != NULL);
+ fuse_file_put(ff, ff->fc->destroy_req != NULL ||
+ ff->fc->close_wait);
}
static int fuse_open(struct inode *inode, struct file *file)
next prev parent reply other threads:[~2013-01-15 15:07 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-20 12:30 [PATCH 0/5] fuse: close file synchronously Maxim Patlasov
2012-12-20 12:31 ` [PATCH 1/5] fuse: add close_wait flag to fuse_conn Maxim Patlasov
2012-12-20 12:31 ` [PATCH 2/5] fuse: cosmetic rework of fuse_send_readpages Maxim Patlasov
2012-12-20 12:31 ` [PATCH 3/5] fuse: wait for end of IO on release Maxim Patlasov
2013-01-02 20:35 ` Brian Foster
2013-01-15 14:04 ` Maxim V. Patlasov
2013-01-15 15:02 ` [PATCH] fuse: wait for end of IO on release (v2) Maxim Patlasov
2012-12-20 12:32 ` [PATCH 4/5] fuse: enable close_wait feature Maxim Patlasov
2013-01-15 15:07 ` Maxim Patlasov [this message]
2012-12-20 12:32 ` [PATCH 5/5] fuse: fix synchronous case of fuse_file_put() Maxim Patlasov
2013-04-11 11:21 ` [fuse-devel] [PATCH 0/5] fuse: close file synchronously Maxim V. Patlasov
2013-04-15 15:08 ` Miklos Szeredi
2013-04-15 15:30 ` Miklos Szeredi
2013-04-15 18:17 ` Al Viro
2013-04-16 9:09 ` Miklos Szeredi
2013-04-17 20:53 ` Miklos Szeredi
2013-04-18 3:25 ` Maxim Patlasov
2013-04-16 18:13 ` Maxim Patlasov
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