generic_file_splice_read() goes into an infinite loop if it races with truncation. I've found this with fsx-linux on NFS over fuse. Perhaps the whole while() loop is bogus, but I can't tell from a cursory glance at __generic_file_splice_read() if it will return zero only on EOF, or it can do that for other reasons as well. In the latter case the loop is obviously needed. This simplistic patch fixes the issue for me. Signed-off-by: Miklos Szeredi <mszeredi@xxxxxxx> --- fs/splice.c | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-) Index: linux/fs/splice.c =================================================================== --- linux.orig/fs/splice.c 2008-04-02 13:34:58.000000000 +0200 +++ linux/fs/splice.c 2008-04-09 17:35:06.000000000 +0200 @@ -481,19 +481,20 @@ ssize_t generic_file_splice_read(struct { ssize_t spliced; int ret; - loff_t isize, left; - - isize = i_size_read(in->f_mapping->host); - if (unlikely(*ppos >= isize)) - return 0; - - left = isize - *ppos; - if (unlikely(left < len)) - len = left; ret = 0; spliced = 0; while (len && !spliced) { + loff_t isize, left; + + isize = i_size_read(in->f_mapping->host); + if (unlikely(*ppos >= isize)) + return 0; + + left = isize - *ppos; + if (unlikely(left < len)) + len = left; + ret = __generic_file_splice_read(in, ppos, pipe, len, flags); if (ret < 0) -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html