Systems and methods for allocating read buffers based on read data sizes in non-volatile storage devices

A method for reading data from a non-volatile memory (NVM), the method comprising:

• receiving, by a controller configured to access a first memory and a second memory that has a higher speed than the first memory, a first read command from a host computer;
• determining, by the controller, a size of one or more buffers that are allocated for one or more read commands that have been received and not returned read data to the host computer;
• determining, by the controller, a number of the one or more read commands;
• determining, by the controller, that at least one of the size of the one or more buffers is smaller than or equal to a threshold buffer size and the number of the one or more read commands is smaller than or equal to a threshold command count;
• in response to determining that at least one of the size of the one or more buffers is smaller than or equal to the threshold buffer size and the number of the one or more read commands is smaller than or equal to the threshold command count, allocating, in the first memory, a first buffer for the first read command;
• and
• after allocating the first buffer but before data for the first read command has been returned to the host computer, determining to allocate a second buffer in the second higher speed memory for the first read command.