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Message-ID: <20121226124450.24502.28562.stgit@maximpc.sw.ru> Date: Wed, 26 Dec 2012 16:44:55 +0400 From: Maxim Patlasov <mpatlasov@...allels.com> To: miklos@...redi.hu Cc: dev@...allels.com, xemul@...allels.com, fuse-devel@...ts.sourceforge.net, bfoster@...hat.com, linux-kernel@...r.kernel.org, devel@...nvz.org Subject: [PATCH 2/3] fuse: skip blocking on allocations of synchronous requests Miklos wrote: > A task may have at most one synchronous request allocated. So these > requests need not be otherwise limited. The patch re-works fuse_get_req() to follow this idea. Signed-off-by: Maxim Patlasov <mpatlasov@...allels.com> --- fs/fuse/dev.c | 21 +++++++++++++-------- 1 files changed, 13 insertions(+), 8 deletions(-) diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c index 0b6b9d1..c7bef93 100644 --- a/fs/fuse/dev.c +++ b/fs/fuse/dev.c @@ -103,17 +103,22 @@ struct fuse_req *fuse_get_req_internal(struct fuse_conn *fc, bool for_background) { struct fuse_req *req; - sigset_t oldset; - int intr; int err; atomic_inc(&fc->num_waiting); - block_sigs(&oldset); - intr = wait_event_interruptible(fc->blocked_waitq, !fc->blocked); - restore_sigs(&oldset); - err = -EINTR; - if (intr) - goto out; + + if (for_background) { + sigset_t oldset; + int intr; + + block_sigs(&oldset); + intr = wait_event_interruptible(fc->blocked_waitq, + !fc->blocked); + restore_sigs(&oldset); + err = -EINTR; + if (intr) + goto out; + } err = -ENOTCONN; if (!fc->connected) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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