https://jira.whamcloud.com This file is an XML representation of an issue en-us 9.4.14 940014 05-12-2023 https://jira.whamcloud.com/browse/LU-4793 Lustre <p>Running some simple read and write tests using "dd" to large files I see a huge amount of memory allocated by the size-1024 slab - about 1/4 if all RAM of the system.</p> <p>The size of the per-page allocation must be reduced in some manner, since this is far to much memory wasted for CLIO overhead. </p> LU-4793

CLIO per-page allocations use size-1024 slab

Bug Critical Resolved Fixed Jinshan Xiong Andreas Dilger Thu, 20 Mar 2014 18:01:08 +0000 Mon, 8 Sep 2014 13:13:57 +0000 Wed, 11 Jun 2014 14:08:26 +0000 Lustre 2.6.0 0 5 <p>The size of cl_page is now 584 bytes. A cl_page is composed of the following sub pages: ccc_page(88 bytes), lov_page(56 bytes), lovsub_page(48 bytes), and osc_page(232 bytes). In osc_page, it has an embedded osc_async_page which is 120 bytes.</p> <p>I think the short term target is to shrink the cl_page down to below 512 bytes so that it can fit into size-512 slab.</p> <p>patch is at: <a href="http://review.whamcloud.com/10070" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/10070</a></p> <p>Increase priority to critical so that patch will be tracked for landing in 2.6.0.</p> <p>Patch landed to Master.</p> Development Rank 1|hzwi1z: Rank (Obsolete) 13192 Severity