From f1512ee61e2f22186ac16481a09d86112b2d6788 Mon Sep 17 00:00:00 2001 From: Matthew Ahrens Date: Mon, 3 Nov 2014 12:15:08 -0800 Subject: Illumos 5027 - zfs large block support 5027 zfs large block support Reviewed by: Alek Pinchuk Reviewed by: George Wilson Reviewed by: Josef 'Jeff' Sipek Reviewed by: Richard Elling Reviewed by: Saso Kiselkov Reviewed by: Brian Behlendorf Approved by: Dan McDonald References: https://www.illumos.org/issues/5027 https://github.com/illumos/illumos-gate/commit/b515258 Porting Notes: * Included in this patch is a tiny ISP2() cleanup in zio_init() from Illumos 5255. * Unlike the upstream Illumos commit this patch does not impose an arbitrary 128K block size limit on volumes. Volumes, like filesystems, are limited by the zfs_max_recordsize=1M module option. * By default the maximum record size is limited to 1M by the module option zfs_max_recordsize. This value may be safely increased up to 16M which is the largest block size supported by the on-disk format. At the moment, 1M blocks clearly offer a significant performance improvement but the benefits of going beyond this for the majority of workloads are less clear. * The illumos version of this patch increased DMU_MAX_ACCESS to 32M. This was determined not to be large enough when using 16M blocks because the zfs_make_xattrdir() function will fail (EFBIG) when assigning a TX. This was immediately observed under Linux because all newly created files must have a security xattr created and that was failing. Therefore, we've set DMU_MAX_ACCESS to 64M. * On 32-bit platforms a hard limit of 1M is set for blocks due to the limited virtual address space. We should be able to relax this one the ABD patches are merged. Ported-by: Brian Behlendorf Closes #354 --- include/sys/zil_impl.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/sys/zil_impl.h') diff --git a/include/sys/zil_impl.h b/include/sys/zil_impl.h index 0db4b525c..0c426a15d 100644 --- a/include/sys/zil_impl.h +++ b/include/sys/zil_impl.h @@ -140,7 +140,7 @@ typedef struct zil_bp_node { avl_node_t zn_node; } zil_bp_node_t; -#define ZIL_MAX_LOG_DATA (SPA_MAXBLOCKSIZE - sizeof (zil_chain_t) - \ +#define ZIL_MAX_LOG_DATA (SPA_OLD_MAXBLOCKSIZE - sizeof (zil_chain_t) - \ sizeof (lr_write_t)) #ifdef __cplusplus -- cgit v1.2.3