From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Vrabel Subject: [PATCH 6/8] HACK! evtchn: increase number of buckets to support the FIFO ABI Date: Tue, 19 Mar 2013 21:00:16 +0000 Message-ID: <1363726818-25409-7-git-send-email-david.vrabel@citrix.com> References: <1363726818-25409-1-git-send-email-david.vrabel@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1363726818-25409-1-git-send-email-david.vrabel@citrix.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: xen-devel@lists.xen.org Cc: Wei Liu , Keir Fraser , David Vrabel , Konrad Rzeszutek Wilk List-Id: xen-devel@lists.xenproject.org From: David Vrabel Increase NR_EVTCHN_BUCKETS so 2^17 event channels are possible. This required increasing EVTCHN_PER_BUCKET so the bucket list fits into a page. HACK! because each bucket is now > PAGE_SIZE. Signed-off-by: David Vrabel --- xen/include/xen/sched.h | 5 +++-- 1 files changed, 3 insertions(+), 2 deletions(-) diff --git a/xen/include/xen/sched.h b/xen/include/xen/sched.h index 1e849aa..f825113 100644 --- a/xen/include/xen/sched.h +++ b/xen/include/xen/sched.h @@ -51,8 +51,9 @@ extern struct domain *dom0; #define BITS_PER_EVTCHN_WORD(d) (has_32bit_shinfo(d) ? 32 : BITS_PER_LONG) #endif #define MAX_EVTCHNS(d) (BITS_PER_EVTCHN_WORD(d) * BITS_PER_EVTCHN_WORD(d)) -#define EVTCHNS_PER_BUCKET 128 -#define NR_EVTCHN_BUCKETS (NR_EVENT_CHANNELS / EVTCHNS_PER_BUCKET) +/* FIXME: this causes each bucket to be > PAGE_SIZE. */ +#define EVTCHNS_PER_BUCKET 256 +#define NR_EVTCHN_BUCKETS ((1 << EVTCHN_FIFO_LINK_BITS) / EVTCHNS_PER_BUCKET) struct evtchn { -- 1.7.2.5