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SubjectRe: [RFC/PATCH] - revert generic_fillattr stat->blksize to PAGE_CACHE_SIZE
Dave Kleikamp wrote:
> On Tue, 2006-11-07 at 07:40 -0600, Dave Kleikamp wrote:
>
>> It would probably be best to just set stat->blksize to the negotiated
>> buffer size.
>>
>
> But be careful here. I don't know how applications/glibc may behave if
> stat->blksize is not a power of 2.
>
The man page is not particularly helpful either as it simply indicates:
"The st_blksize field gives the preferred blocksize for efficient
file system I/O. "
but it appears that blksize would affects readdir performance more than
read/write
(since read/write go through the pagecache and thus readpages/writepages
will request readahead/writebehind for many pages at a time) unless the
application
opens the file direct i/o.
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