linux-kernel - Re: [PATCH 03/33] mm: slub: add knowledge of reserve pages

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 for Android: free password hash cracker in your pocket

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

Date:	Wed, 31 Oct 2007 14:08:43 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Nick Piggin <nickpiggin@...oo.com.au>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	netdev@...r.kernel.org, trond.myklebust@....uio.no
Subject: Re: [PATCH 03/33] mm: slub: add knowledge of reserve pages

On Wed, 2007-10-31 at 13:54 +0100, Peter Zijlstra wrote:
> On Wed, 2007-10-31 at 22:25 +1100, Nick Piggin wrote:

> > What I'm saying is that the slab allocator slowpath should always
> > just check watermarks against the current task. Instead of this
> > ->reserve stuff.
> 
> So what you say is to allocate a slab every time we take the slow path,
> even when we already have one?

BTW, a task that does not have reserve permissions will already attempt
to allocate a new slab - this is done to probe the current watermarks.
If this succeeds the reserve status is lifted.


-
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/