Date: Tue, 30 Apr 2013 07:49:40 +0400 From: Vagner <vagner@bsdway.ru> To: freebsd-hackers@freebsd.org Cc: vagner@bsdway.ru Subject: Re: SystemV IPC. Segment info Message-ID: <20130430034940.GA8305@vagner-wrk.bsdway.ru> In-Reply-To: <mailman.7.1366113601.5692.freebsd-hackers@freebsd.org> References: <mailman.7.1366113601.5692.freebsd-hackers@freebsd.org>
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Tell me please, may I send this to PR, or this changes is not valid? > Hello! > A few weeks ago, I ran into problem, which related to SystemV IPC. > More than 20 processes attached to a segment shared queue. Process-initiator for > create segment was killed, as process which was accessed to segment > last. Segment didn't free memory, but tagged it as SHMSEG_REMOVED as > the result. This is a reason of memory overflow (memory assotiated as > shm). Moreover, processes, which was attached to this segment did't > get a new data. I have one resolve. I need to restarted all process, > which still attached to segment. But this reason have a problem. We > haven't list of this processes at system. Moreover, struct shmid_ds, > which described segment, haven't this info too. > > This patch is a resolve of problem. It: > - added a linked list of structures shmid_pi in struct shmid_ds. PID > (and last access time) recorded to this struct consistently. Memory > allocates with ident 'shminfo' for this list of struct shmid_pi. > - added syscall shminf for get all elements from list shmid_ds. > - added option [-P] in ipcs(1) for system call shminf. > > Thanks. > > -- > Respectfully, > Stanislav Putrya > System administrator > FotoStrana.Ru Ltd. > ICQ IM: 328585847 > Jabber-GoogleTalk: root.vagner > mob.phone SPB: +79215788755 > mob.phone RND: +79525600664 > email: vagner@bsdway.ru > email: putrya@playform.ru > email: root.vagner@gmail.com > site: bsdway.ru > site: fotostrana.ru > > ---------------------------------------- > ( ) ASCII ribbon campaign > X - against HTML, vCards and > / \ - proprietary attachments in e-mail > -------------- next part -------------- > A non-text attachment was scrubbed... > Name: shminf.patch > Type: text/x-diff > Size: 30460 bytes > Desc: not available > URL: <http://lists.freebsd.org/pipermail/freebsd-hackers/attachments/20130415/233bf05f/attachment-0001.patch>; >
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