Mercurial > hg > nginx
changeset 2316:402797ed988a
allow directio on XFS
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Thu, 20 Nov 2008 16:21:39 +0000 |
parents | 31fafd8e7436 |
children | 24763afa5efe |
files | src/core/ngx_output_chain.c |
diffstat | 1 files changed, 14 insertions(+), 3 deletions(-) [+] |
line wrap: on
line diff
--- a/src/core/ngx_output_chain.c +++ b/src/core/ngx_output_chain.c @@ -13,6 +13,17 @@ #define NGX_SENDFILE_LIMIT 4096 #endif +/* + * When DIRECTIO is enabled FreeBSD, Solaris, and MacOSX read directly + * to an application memory from a device if parameters are aligned + * to device sector boundary(512 bytes). They fallback to usual read + * operation if the parameters are not aligned. + * Linux allows DIRECTIO only if the parameters are aligned to a filesystem + * sector boundary, otherwise it returns EINVAL. The sector size is + * usually 512 bytes, however, on XFS it may be 4096 bytes. + */ +#define NGX_DIRECTIO_BLOCK 4096 + #define NGX_NONE 1 @@ -327,7 +338,7 @@ ngx_output_chain_align_file_buf(ngx_outp ctx->directio = 1; - size = (size_t) (in->file_pos - (in->file_pos & ~511)); + size = (size_t) (in->file_pos - (in->file_pos & ~(NGX_DIRECTIO_BLOCK - 1))); if (size == 0) { @@ -338,7 +349,7 @@ ngx_output_chain_align_file_buf(ngx_outp size = (size_t) bsize; } else { - size = 512 - size; + size = NGX_DIRECTIO_BLOCK - size; if ((off_t) size > bsize) { size = (size_t) bsize; @@ -413,7 +424,7 @@ ngx_output_chain_get_buf(ngx_output_chai * userland buffer direct usage conjunctly with directio */ - b->start = ngx_pmemalign(ctx->pool, size, 512); + b->start = ngx_pmemalign(ctx->pool, size, NGX_DIRECTIO_BLOCK); if (b->start == NULL) { return NGX_ERROR; }