From: David Howells <dhowells@redhat.com>
To: Jia Zhu <zhujia.zj@bytedance.com>
Cc: dhowells@redhat.com, linux-cachefs@redhat.com,
linux-erofs@lists.ozlabs.org, linux-kernel@vger.kernel.org,
jefflexu@linux.alibaba.com, hsiangkao@linux.alibaba.com,
yinxin.x@bytedance.com
Subject: Re: [PATCH V5 4/5] cachefiles: narrow the scope of triggering EPOLLIN events in ondemand mode
Date: Fri, 14 Apr 2023 14:48:48 +0100 [thread overview]
Message-ID: <1250225.1681480128@warthog.procyon.org.uk> (raw)
In-Reply-To: <20230329140155.53272-5-zhujia.zj@bytedance.com>
Jia Zhu <zhujia.zj@bytedance.com> wrote:
> if (cachefiles_in_ondemand_mode(cache)) {
> - if (!xa_empty(&cache->reqs))
> - mask |= EPOLLIN;
> + if (!xa_empty(xa)) {
> + rcu_read_lock();
> + xa_for_each_marked(xa, index, req, CACHEFILES_REQ_NEW) {
> + if (!cachefiles_ondemand_is_reopening_read(req)) {
> + mask |= EPOLLIN;
> + break;
> + }
> + }
> + rcu_read_unlock();
You should probably use xas_for_each_marked() instead of xa_for_each_marked()
as the former should perform better.
David
next prev parent reply other threads:[~2023-04-14 13:50 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-29 14:01 [PATCH V5 0/5] Introduce daemon failover mechanism to recover from crashing Jia Zhu
2023-03-29 14:01 ` [PATCH V5 1/5] cachefiles: introduce object ondemand state Jia Zhu
2023-03-29 14:01 ` [PATCH V5 2/5] cachefiles: extract ondemand info field from cachefiles_object Jia Zhu
2023-03-29 14:01 ` [PATCH V5 3/5] cachefiles: resend an open request if the read request's object is closed Jia Zhu
2023-03-29 14:01 ` [PATCH V5 4/5] cachefiles: narrow the scope of triggering EPOLLIN events in ondemand mode Jia Zhu
2023-03-29 14:01 ` [PATCH V5 5/5] cachefiles: add restore command to recover inflight ondemand read requests Jia Zhu
2023-04-14 13:48 ` David Howells [this message]
2023-04-14 14:13 ` Re: [PATCH V5 4/5] cachefiles: narrow the scope of triggering EPOLLIN events in ondemand mode Jia Zhu
2023-04-14 13:51 ` [PATCH V5 2/5] cachefiles: extract ondemand info field from cachefiles_object David Howells
2023-04-14 15:45 ` Jia Zhu
2023-04-14 13:53 ` [PATCH V5 5/5] cachefiles: add restore command to recover inflight ondemand read requests David Howells
2023-04-14 15:12 ` Jia Zhu
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