linux-kernel - RE: [f2fs-dev] [PATCH v2] f2fs: refactor bio-related operations

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-id: <1386144643.2417.148.camel@kjgkr>
Date:	Wed, 04 Dec 2013 17:10:43 +0900
From:	Jaegeuk Kim <jaegeuk.kim@...sung.com>
To:	Chao Yu <chao2.yu@...sung.com>
Cc:	linux-kernel@...r.kernel.org,
	linux-f2fs-devel@...ts.sourceforge.net,
	linux-fsdevel@...r.kernel.org,
	谭姝 <shu.tan@...sung.com>
Subject: RE: [f2fs-dev] [PATCH v2] f2fs: refactor bio-related operations

Hi,

> > +	if (btype == META)
> > +		rw |= REQ_META;
> > +
> > +	if (is_read_io(rw)) {
> > +		if (sync)
> > +			rw |= READ_SYNC;
> > +		submit_bio(rw, io->bio);
> > +		trace_f2fs_submit_read_bio(sbi->sb, rw, type, io->bio);
> > +		io->bio = NULL;
> > +		return;
> > +	}
> > +
> > +	if (sync)
> > +		rw |= WRITE_SYNC;
> 
> rw = WRITE_SYNC; ?

No, since it removes the REQ_META.
See above.

> 
> > +	if (type >= META_FLUSH)
> > +		rw |= WRITE_FLUSH_FUA;
> 
> rw = WRITE_FLUSH_FUA; ?
> 
> > +
> > +	/*
> > +	 * META_FLUSH is only from the checkpoint procedure, and we should wait
> > +	 * this metadata bio for FS consistency.
> > +	 */
> > +	if (type == META_FLUSH) {
> > +		DECLARE_COMPLETION_ONSTACK(wait);
> > +		io->bio->bi_private = &wait;
> > +		submit_bio(rw, io->bio);
> > +		wait_for_completion(&wait);
> > +	} else {
> > +		submit_bio(rw, io->bio);
> > +	}
> > +	trace_f2fs_submit_write_bio(sbi->sb, rw, btype, io->bio);
> > +	io->bio = NULL;
> > +}
> 
> [snip]
> 
> Thanks,
> Yu
> 

-- 
Jaegeuk Kim
Samsung

--
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/