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branches/zip: buf_page_create(): Do not IO-fix or X-latch the block

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when not invoking buf_buddy_alloc().
This commit is contained in:
marko 2007-02-08 12:33:54 +00:00
parent 76fa1cfbdd
commit 5035ff1af4
1 changed files with 11 additions and 10 deletions
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21
buf/buf0buf.c
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@ -2573,15 +2573,16 @@ buf_page_create(
buf_block_buf_fix_inc(block, __FILE__, __LINE__);
buf_pool->n_pages_created++;
/* Prevent race conditions during buf_buddy_alloc(),
which may release and reacquire buf_pool->mutex,
by IO-fixing and X-latching the block. */
buf_page_set_io_fix(&block->page, BUF_IO_READ);
rw_lock_x_lock(&block->lock);
if (zip_size) {
void* data;
/* Prevent race conditions during buf_buddy_alloc(),
which may release and reacquire buf_pool->mutex,
by IO-fixing and X-latching the block. */
buf_page_set_io_fix(&block->page, BUF_IO_READ);
rw_lock_x_lock(&block->lock);
page_zip_set_size(&block->page.zip, zip_size);
mutex_exit(&block->mutex);
/* buf_pool->mutex may be released and reacquired by
@ -2593,10 +2594,10 @@ buf_page_create(
data = buf_buddy_alloc(zip_size, TRUE);
mutex_enter(&block->mutex);
block->page.zip.data = data;
}
buf_page_set_io_fix(&block->page, BUF_IO_NONE);
rw_lock_x_unlock(&block->lock);
buf_page_set_io_fix(&block->page, BUF_IO_NONE);
rw_lock_x_unlock(&block->lock);
}
mutex_exit(&(buf_pool->mutex));