linux-kernel - [PATCH 0/3] compressed in-memory swapping take2

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-next>] [day] [month] [year] [list]

Message-ID: <49C3A31D.6070208@vflare.org>
Date:	Fri, 20 Mar 2009 19:37:25 +0530
From:	Nitin Gupta <ngupta@...are.org>
To:	Pekka Enberg <penberg@...helsinki.fi>,
	Christoph Lameter <cl@...ux-foundation.org>
CC:	linux-kernel@...r.kernel.org
Subject: [PATCH 0/3] compressed in-memory swapping take2

Hi,

It allows creating a RAM based block device which acts as swap disk.
Pages swapped to this device are compressed and stored in memory itself.
This is a big win over swapping to slow hard-disk which are typically used
as swap disk. For flash, these suffer from wear-leveling issues when used
as swap disk - so again its helpful. For swapless systems, it allows more
apps to run.

* Changelog: take2 vs initial revision:
xvmalloc changes:
  - Use Linux kernel coding sytle for xvmalloc
  - Collapse all individual flag test/set/get to generic {test_set_get}_flag
  - Added BLOCK_NEXT() macro to reach next contiguous block
  - Other minor cleanups - no functional changes
compcache block device code:
  - compcache core changes due to change in xvmalloc interface names

Links to performance numbers, use cases can be found in original thread:
http://lkml.org/lkml/2009/3/17/116

Thanks to Christoph and Pekka for feedback on initial revision.

Thanks,
Nitin
--
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/