From: Vladimir Davydov <vdavydov.dev@gmail.com> To: Serge Petrenko <sergepetrenko@tarantool.org> Cc: tarantool-patches@freelists.org Subject: Re: [PATCH] box: ensure fiber processing box.cfg doesn't process messages from iproto Date: Mon, 12 Nov 2018 14:40:33 +0300 [thread overview] Message-ID: <20181112114033.srhds7nlbmq7oogq@esperanza> (raw) In-Reply-To: <20181110112436.1118-1-sergepetrenko@tarantool.org> On Sat, Nov 10, 2018 at 02:24:36PM +0300, Serge Petrenko wrote: > In box_cfg() we have a call to gc_set_wal_watcher(), which creates pipes > between 'wal' and 'tx' under the hood using cbus_pair(). > While pipes are being created, the fiber calling gc_set_wal_watcher() > will process all the messages coming to 'tx' thread from iproto. This is > wrong, since we have a separate fiber pool to handle iproto messages, > and background fibers shouldn't participate in these messages > processing. For example, this causes occasional credential corruption in > the fiber executing box_cfg(). > > Since tx fiber pool is already created at the time gc_set_wal_watcher() > is called, we may forbid message processing for the fiber which calls > the function, one of the tx fiber pool fibers will wake us up when the > pipes are created. > > Closes #3779 > --- > https://github.com/tarantool/tarantool/tree/sp/gh-3779-fix > https://github.com/tarantool/tarantool/issues/3779 > > src/box/gc.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/src/box/gc.c b/src/box/gc.c > index 467eecb91..8f0ecb0b9 100644 > --- a/src/box/gc.c > +++ b/src/box/gc.c > @@ -110,7 +110,7 @@ void > gc_set_wal_watcher(void) > { Please add a comment to the code, otherwise the patch looks OK. > wal_set_watcher(&gc.wal_watcher, "tx", gc_process_wal_event, > - cbus_process, WAL_EVENT_GC); > + NULL, WAL_EVENT_GC); > } > > void
next prev parent reply other threads:[~2018-11-12 11:40 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-11-10 11:24 Serge Petrenko 2018-11-12 11:40 ` Vladimir Davydov [this message] 2018-11-13 6:54 ` Serge Petrenko 2018-11-13 9:31 ` Vladimir Davydov
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20181112114033.srhds7nlbmq7oogq@esperanza \ --to=vdavydov.dev@gmail.com \ --cc=sergepetrenko@tarantool.org \ --cc=tarantool-patches@freelists.org \ --subject='Re: [PATCH] box: ensure fiber processing box.cfg doesn'\''t process messages from iproto' \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: link
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox